[JENKINS-EA] Lucene-Solr-6.x-Linux (32bit/jdk-9-ea+107) - Build # 29 - Still Failing!

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Build: http://jenkins.thetaphi.de/job/Lucene-Solr-6.x-Linux/29/
Java: 32bit/jdk-9-ea+107 -server -XX:+UseG1GC

15 tests failed.
FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetFixedLengthSingleValuedVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-002/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-002/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:7255F5797508793A]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetFixedLengthSingleValuedVsStoredFields(BaseDocValuesFormatTestCase.java:2152)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 50 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetFixedLengthFewUniqueSetsVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-004/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-004/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:B0135437650F9028]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.maybeFlushOrCommit(RandomIndexWriter.java:188)
        at 
org.apache.lucene.index.RandomIndexWriter.addDocument(RandomIndexWriter.java:173)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1981)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetFixedLengthFewUniqueSetsVsStoredFields(BaseDocValuesFormatTestCase.java:2168)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 51 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testTermsEnumFixedWidth

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/tempDir-004/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/tempDir-004/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:B24FB44CC68676B]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.doTestTermsEnumRandom(TestLucene50DocValuesFormat.java:171)
        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testTermsEnumFixedWidth(TestLucene50DocValuesFormat.java:99)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 50 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testThreads3

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/tempDir-005/_3.fdx")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/tempDir-005/_3.fdx")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:8D24BC8E54AF60B6]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
        at 
org.apache.lucene.index.DocumentsWriter.postUpdate(DocumentsWriter.java:376)
        at 
org.apache.lucene.index.DocumentsWriter.updateDocument(DocumentsWriter.java:466)
        at 
org.apache.lucene.index.IndexWriter.updateDocument(IndexWriter.java:1492)
        at 
org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:1271)
        at 
org.apache.lucene.index.RandomIndexWriter.addDocument(RandomIndexWriter.java:170)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testThreads3(BaseDocValuesFormatTestCase.java:2720)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 54 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetVariableLengthBigVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-010/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-010/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:933CC8230502816C]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetVariableLengthBigVsStoredFields(TestLucene50DocValuesFormat.java:67)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 50 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedVariableLengthVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-013/_0_Lucene50_0.dvd")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-013/_0_Lucene50_0.dvd")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:C59E8DF5A841146C]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedVsStoredFields(BaseDocValuesFormatTestCase.java:1451)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedVariableLengthVsStoredFields(BaseDocValuesFormatTestCase.java:1503)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 55 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testMultiClose

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/justSoYouGetSomeChannelErrors-001/_0_Asserting_0.doc")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/justSoYouGetSomeChannelErrors-001/_0_Asserting_0.doc")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:7219ACA489138B3F]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.codecs.lucene50.Lucene50PostingsReader.<init>(Lucene50PostingsReader.java:81)
        at 
org.apache.lucene.codecs.lucene50.Lucene50PostingsFormat.fieldsProducer(Lucene50PostingsFormat.java:443)
        at 
org.apache.lucene.codecs.asserting.AssertingPostingsFormat.fieldsProducer(AssertingPostingsFormat.java:58)
        at 
org.apache.lucene.codecs.perfield.PerFieldPostingsFormat$FieldsReader.<init>(PerFieldPostingsFormat.java:261)
        at 
org.apache.lucene.codecs.perfield.PerFieldPostingsFormat.fieldsProducer(PerFieldPostingsFormat.java:341)
        at 
org.apache.lucene.index.BaseIndexFileFormatTestCase.testMultiClose(BaseIndexFileFormatTestCase.java:326)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testMultiClose(BaseDocValuesFormatTestCase.java:77)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 47 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testMergeStability

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/index-MMapDirectory-001/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/index-MMapDirectory-001/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:826806B09B9BE091]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.BaseIndexFileFormatTestCase.testMergeStability(BaseIndexFileFormatTestCase.java:213)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testMergeStability(BaseDocValuesFormatTestCase.java:77)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 49 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testTermsEnumVariableWidth

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/tempDir-002/_1w.fdx")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/tempDir-002/_1w.fdx")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:331854602BCEDC6C]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.doTestTermsEnumRandom(TestLucene50DocValuesFormat.java:171)
        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testTermsEnumVariableWidth(TestLucene50DocValuesFormat.java:107)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 55 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetVariableLengthManyValuesPerDocVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-001/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-001/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:2DE104894933C85A]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetVariableLengthManyValuesPerDocVsStoredFields(BaseDocValuesFormatTestCase.java:2184)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 50 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedVariableLengthBigVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-011/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-011/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:6D407FAA56A47A8]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedVsStoredFields(BaseDocValuesFormatTestCase.java:1451)
        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedVariableLengthBigVsStoredFields(TestLucene50DocValuesFormat.java:83)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 50 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetVariableLengthFewUniqueSetsVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-014/_0_Lucene50_0.dvd")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-014/_0_Lucene50_0.dvd")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:6DA794C74F391294]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetVariableLengthFewUniqueSetsVsStoredFields(BaseDocValuesFormatTestCase.java:2176)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 55 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetVariableLengthVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-017/_0_Lucene50_0.dvd")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-017/_0_Lucene50_0.dvd")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:D2351163F28DF58A]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetVariableLengthVsStoredFields(BaseDocValuesFormatTestCase.java:2143)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 55 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetFixedLengthVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-024/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-024/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:8357F153818CBA71]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetFixedLengthVsStoredFields(BaseDocValuesFormatTestCase.java:2047)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 50 more


FAILED:  
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedSetFixedLengthManyValuesPerDocVsStoredFields

Error Message:
Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-025/_0.si")

Stack Trace:
java.io.IOException: Unable to unmap the mapped buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-025/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:B0AB566E21592953]:0)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
        at org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
        at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetFixedLengthManyValuesPerDocVsStoredFields(BaseDocValuesFormatTestCase.java:2192)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:520)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1764)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:871)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:907)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:921)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:809)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:460)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:880)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:781)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:816)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:827)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:367)
        at java.lang.Thread.run(Thread.java:804)
Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
        at java.security.AccessController.doPrivileged(Native Method)
        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
        ... 50 more




Build Log:
[...truncated 4253 lines...]
   [junit4] Suite: org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat
   [

[...truncated too long message...]

Directory-001/_0.si")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:826806B09B9BE091]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
   [junit4]    >        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
   [junit4]    >        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
   [junit4]    >        at 
org.apache.lucene.index.BaseIndexFileFormatTestCase.testMergeStability(BaseIndexFileFormatTestCase.java:213)
   [junit4]    >        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testMergeStability(BaseDocValuesFormatTestCase.java:77)
   [junit4]    >        at java.lang.Thread.run(Thread.java:804)
   [junit4]    > Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
   [junit4]    >        at java.security.AccessController.doPrivileged(Native 
Method)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
   [junit4]    >        ... 49 more
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedSetFixedLengthVsStoredFields 
-Dtests.seed=F624409F9671E227 -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=sw -Dtests.timezone=Asia/Tel_Aviv -Dtests.asserts=true 
-Dtests.file.encoding=UTF-8
   [junit4] ERROR   1.34s J2 | 
TestLucene50DocValuesFormat.testSortedSetFixedLengthVsStoredFields <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-024/_0.si")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:8357F153818CBA71]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
   [junit4]    >        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
   [junit4]    >        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
   [junit4]    >        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
   [junit4]    >        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
   [junit4]    >        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetFixedLengthVsStoredFields(BaseDocValuesFormatTestCase.java:2047)
   [junit4]    >        at java.lang.Thread.run(Thread.java:804)
   [junit4]    > Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
   [junit4]    >        at java.security.AccessController.doPrivileged(Native 
Method)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
   [junit4]    >        ... 50 more
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedSetFixedLengthManyValuesPerDocVsStoredFields 
-Dtests.seed=F624409F9671E227 -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=sw -Dtests.timezone=Asia/Tel_Aviv -Dtests.asserts=true 
-Dtests.file.encoding=UTF-8
   [junit4] ERROR   0.02s J2 | 
TestLucene50DocValuesFormat.testSortedSetFixedLengthManyValuesPerDocVsStoredFields
 <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001/dvduel-025/_0.si")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([F624409F9671E227:B0AB566E21592953]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
   [junit4]    >        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
   [junit4]    >        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
   [junit4]    >        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
   [junit4]    >        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
   [junit4]    >        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetFixedLengthManyValuesPerDocVsStoredFields(BaseDocValuesFormatTestCase.java:2192)
   [junit4]    >        at java.lang.Thread.run(Thread.java:804)
   [junit4]    > Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
   [junit4]    >        at java.security.AccessController.doPrivileged(Native 
Method)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
   [junit4]    >        ... 50 more
   [junit4]   2> NOTE: leaving temporary files on disk at: 
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_F624409F9671E227-001
   [junit4]   2> NOTE: test params are: codec=Asserting(Lucene60), 
sim=RandomSimilarity(queryNorm=true,coord=yes): {fieldname=IB SPL-L1, docId=IB 
LL-DZ(0.3), id=DFR GL1}, locale=sw, timezone=Asia/Tel_Aviv
   [junit4]   2> NOTE: Linux 3.19.0-51-generic i386/Oracle Corporation 9-ea 
(32-bit)/cpus=12,threads=1,free=64863840,total=101711872
   [junit4]   2> NOTE: All tests run in this JVM: [TestMaxPositionInOldIndex, 
TestLucene50DocValuesFormat]
   [junit4] Completed [4/4 (1!)] on J2 in 73.69s, 105 tests, 15 errors, 3 
skipped <<< FAILURES!

[...truncated 20 lines...]
BUILD FAILED
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/build.xml:740: The following 
error occurred while executing this line:
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/build.xml:684: The following 
error occurred while executing this line:
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/build.xml:59: The following error 
occurred while executing this line:
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build.xml:476: The 
following error occurred while executing this line:
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/common-build.xml:2187: The 
following error occurred while executing this line:
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/module-build.xml:58: The 
following error occurred while executing this line:
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/common-build.xml:1457: The 
following error occurred while executing this line:
/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/common-build.xml:1014: 
There were test failures: 4 suites, 152 tests, 15 errors, 11 ignored (11 
assumptions) [seed: F624409F9671E227]

Total time: 12 minutes 59 seconds
Build step 'Invoke Ant' marked build as failure
Archiving artifacts
[WARNINGS] Skipping publisher since build result is FAILURE
Recording test results
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any



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