Build: http://jenkins.thetaphi.de/job/Lucene-Solr-6.x-Linux/28/
Java: 64bit/jdk-9-ea+107 -XX:+UseCompressedOops -XX:+UseG1GC

8 tests failed.
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_D2DEA7708D1B350C-001/dvduel-005/_1a.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_D2DEA7708D1B350C-001/dvduel-005/_1a.fdx")
        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:495D73285453C5BF]: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.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_D2DEA7708D1B350C-001/dvduel-007/_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_D2DEA7708D1B350C-001/dvduel-007/_0_Lucene50_0.dvd")
        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:A7AD16BC9AE66D5A]: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.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)
        ... 55 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_D2DEA7708D1B350C-001/dvduel-015/_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_D2DEA7708D1B350C-001/dvduel-015/_0_Lucene50_0.dvd")
        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:222EE015BE009083]: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.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)
        ... 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_D2DEA7708D1B350C-001/dvduel-018/_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_D2DEA7708D1B350C-001/dvduel-018/_0_Lucene50_0.dvd")
        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:F6CFF68CE9E722A1]: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.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_D2DEA7708D1B350C-001/dvduel-021/_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_D2DEA7708D1B350C-001/dvduel-021/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:91BE36652591F71]: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.testSortedFixedLengthVsStoredFields

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_D2DEA7708D1B350C-001/dvduel-028/_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_D2DEA7708D1B350C-001/dvduel-028/_0_Lucene50_0.dvd")
        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:3E5BD4E0421297BB]: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.testSortedFixedLengthVsStoredFields(BaseDocValuesFormatTestCase.java:1496)
        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.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_D2DEA7708D1B350C-001/tempDir-007/_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_D2DEA7708D1B350C-001/tempDir-007/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:17E2B38F30A40B47]: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.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)
        ... 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_D2DEA7708D1B350C-001/dvduel-029/_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_D2DEA7708D1B350C-001/dvduel-029/_0.si")
        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:9451B1813A33FE78]: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 4249 lines...]
   [junit4] Suite: org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat
   [junit4] IGNOR/A 0.01s J2 | 
TestLucene50DocValuesFormat.testSortedSetVariableLengthManyVsStoredFields
   [junit4]    > Assumption #1: 'nightly' test group is disabled (@Nightly())
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedSetVariableLengthFewUniqueSetsVsStoredFields 
-Dtests.seed=D2DEA7708D1B350C -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=hr -Dtests.timezone=Etc/GMT+5 -Dtests.asserts=true 
-Dtests.file.encoding=US-ASCII
   [junit4] ERROR   0.86s J2 | 
TestLucene50DocValuesFormat.testSortedSetVariableLengthFewUniqueSetsVsStoredFields
 <<<
   [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_D2DEA7708D1B350C-001/dvduel-005/_1a.fdx")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:495D73285453C5BF]: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.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
   [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.testSortedSetVariableLengthFewUniqueSetsVsStoredFields(BaseDocValuesFormatTestCase.java:2176)
   [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$1(MMapDirectory.java:375)
   [junit4]    >        ... 55 more
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedSetFixedLengthVsStoredFields 
-Dtests.seed=D2DEA7708D1B350C -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=hr -Dtests.timezone=Etc/GMT+5 -Dtests.asserts=true 
-Dtests.file.encoding=US-ASCII
   [junit4] ERROR   1.20s J2 | 
TestLucene50DocValuesFormat.testSortedSetFixedLengthVsStoredFields <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_D2DEA7708D1B350C-001/dvduel-007/_0_Lucene50_0.dvd")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:A7AD16BC9AE66D5A]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$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.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
   [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$1(MMapDirectory.java:375)
   [junit4]    >        ... 55 more
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedVariableLengthBigVsStoredFields 
-Dtests.seed=D2DEA7708D1B350C -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=hr -Dtests.timezone=Etc/GMT+5 -Dtests.asserts=true 
-Dtests.file.encoding=US-ASCII
   [junit4] ERROR   5.72s J2 | 
TestLucene50DocValuesFormat.testSortedVariableLengthBigVsStoredFields <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_D2DEA7708D1B350C-001/dvduel-015/_0_Lucene50_0.dvd")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:222EE015BE009083]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$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.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
   [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.doTestSortedVsStoredFields(BaseDocValuesFormatTestCase.java:1451)
   [junit4]    >        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testSortedVariableLengthBigVsStoredFields(TestLucene50DocValuesFormat.java:83)
   [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$1(MMapDirectory.java:375)
   [junit4]    >        ... 55 more
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedSetVariableLengthVsStoredFields 
-Dtests.seed=D2DEA7708D1B350C -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=hr -Dtests.timezone=Etc/GMT+5 -Dtests.asserts=true 
-Dtests.file.encoding=US-ASCII
   [junit4] ERROR   1.00s J2 | 
TestLucene50DocValuesFormat.testSortedSetVariableLengthVsStoredFields <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_D2DEA7708D1B350C-001/dvduel-018/_0_Lucene50_0.dvd")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:F6CFF68CE9E722A1]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$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.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
   [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.testSortedSetVariableLengthVsStoredFields(BaseDocValuesFormatTestCase.java:2143)
   [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$1(MMapDirectory.java:375)
   [junit4]    >        ... 55 more
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedSetVariableLengthManyValuesPerDocVsStoredFields 
-Dtests.seed=D2DEA7708D1B350C -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=hr -Dtests.timezone=Etc/GMT+5 -Dtests.asserts=true 
-Dtests.file.encoding=US-ASCII
   [junit4] ERROR   0.32s J2 | 
TestLucene50DocValuesFormat.testSortedSetVariableLengthManyValuesPerDocVsStoredFields
 <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_D2DEA7708D1B350C-001/dvduel-021/_0.si")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:91BE36652591F71]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
   [junit4]    >        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
   [junit4]    >        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
   [junit4]    >        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
   [junit4]    >        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.doTestSortedSetVsStoredFields(BaseDocValuesFormatTestCase.java:1983)
   [junit4]    >        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedSetVariableLengthManyValuesPerDocVsStoredFields(BaseDocValuesFormatTestCase.java:2184)
   [junit4]    >        at java.lang.Thread.run(Thread.java:804)
   [junit4]    > Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
   [junit4]    >        at java.security.AccessController.doPrivileged(Native 
Method)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
   [junit4]    >        ... 50 more
   [junit4] IGNOR/A 0.00s J2 | 
TestLucene50DocValuesFormat.testSortedVariableLengthManyVsStoredFields
   [junit4]    > Assumption #1: 'nightly' test group is disabled (@Nightly())
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedFixedLengthVsStoredFields 
-Dtests.seed=D2DEA7708D1B350C -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=hr -Dtests.timezone=Etc/GMT+5 -Dtests.asserts=true 
-Dtests.file.encoding=US-ASCII
   [junit4] ERROR   0.01s J2 | 
TestLucene50DocValuesFormat.testSortedFixedLengthVsStoredFields <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_D2DEA7708D1B350C-001/dvduel-028/_0_Lucene50_0.dvd")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:3E5BD4E0421297BB]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$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.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat.write(Lucene50CompoundFormat.java:90)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.createCompoundFile(IndexWriter.java:4680)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.sealFlushedSegment(DocumentsWriterPerThread.java:496)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:460)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:502)
   [junit4]    >        at 
org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:614)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2815)
   [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.doTestSortedVsStoredFields(BaseDocValuesFormatTestCase.java:1451)
   [junit4]    >        at 
org.apache.lucene.index.BaseDocValuesFormatTestCase.testSortedFixedLengthVsStoredFields(BaseDocValuesFormatTestCase.java:1496)
   [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$1(MMapDirectory.java:375)
   [junit4]    >        ... 55 more
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testTermsEnumVariableWidth -Dtests.seed=D2DEA7708D1B350C 
-Dtests.multiplier=3 -Dtests.slow=true -Dtests.locale=hr 
-Dtests.timezone=Etc/GMT+5 -Dtests.asserts=true -Dtests.file.encoding=US-ASCII
   [junit4] ERROR   10.6s J2 | 
TestLucene50DocValuesFormat.testTermsEnumVariableWidth <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_D2DEA7708D1B350C-001/tempDir-007/_0.si")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:17E2B38F30A40B47]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:384)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.freeBuffer(ByteBufferIndexInput.java:376)
   [junit4]    >        at 
org.apache.lucene.store.ByteBufferIndexInput.close(ByteBufferIndexInput.java:355)
   [junit4]    >        at 
org.apache.lucene.util.LuceneTestCase.slowFileExists(LuceneTestCase.java:2695)
   [junit4]    >        at 
org.apache.lucene.store.MockDirectoryWrapper.openInput(MockDirectoryWrapper.java:732)
   [junit4]    >        at 
org.apache.lucene.store.FilterDirectory.openInput(FilterDirectory.java:94)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.slowFileExists(IndexWriter.java:4814)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.filesExist(IndexWriter.java:4351)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4422)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2876)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2989)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2956)
   [junit4]    >        at 
org.apache.lucene.index.RandomIndexWriter.commit(RandomIndexWriter.java:288)
   [junit4]    >        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.doTestTermsEnumRandom(TestLucene50DocValuesFormat.java:171)
   [junit4]    >        at 
org.apache.lucene.codecs.lucene50.TestLucene50DocValuesFormat.testTermsEnumVariableWidth(TestLucene50DocValuesFormat.java:107)
   [junit4]    >        at java.lang.Thread.run(Thread.java:804)
   [junit4]    > Caused by: java.lang.IncompatibleClassChangeError: Found class 
jdk.internal.ref.Cleaner, but interface was expected
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$0(MMapDirectory.java:377)
   [junit4]    >        at java.security.AccessController.doPrivileged(Native 
Method)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$unmapHackImpl$1(MMapDirectory.java:375)
   [junit4]    >        ... 50 more
   [junit4]   2> NOTE: reproduce with: ant test  
-Dtestcase=TestLucene50DocValuesFormat 
-Dtests.method=testSortedSetFixedLengthManyValuesPerDocVsStoredFields 
-Dtests.seed=D2DEA7708D1B350C -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=hr -Dtests.timezone=Etc/GMT+5 -Dtests.asserts=true 
-Dtests.file.encoding=US-ASCII
   [junit4] ERROR   0.04s J2 | 
TestLucene50DocValuesFormat.testSortedSetFixedLengthManyValuesPerDocVsStoredFields
 <<<
   [junit4]    > Throwable #1: java.io.IOException: Unable to unmap the mapped 
buffer: 
MMapIndexInput(path="/home/jenkins/workspace/Lucene-Solr-6.x-Linux/lucene/build/backward-codecs/test/J2/temp/lucene.codecs.lucene50.TestLucene50DocValuesFormat_D2DEA7708D1B350C-001/dvduel-029/_0.si")
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([D2DEA7708D1B350C:9451B1813A33FE78]:0)
   [junit4]    >        at 
org.apache.lucene.store.MMapDirectory.lambda$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] IGNOR/A 0.00s J2 | 
TestLucene50DocValuesFormat.testTermsEnumRandomMany
   [junit4]    > Assumption #1: 'nightly' test group is disabled (@Nightly())
   [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_D2DEA7708D1B350C-001
   [junit4]   2> NOTE: test params are: 
codec=FastDecompressionCompressingStoredFields(storedFieldsFormat=CompressingStoredFieldsFormat(compressionMode=FAST_DECOMPRESSION,
 chunkSize=1, maxDocsPerChunk=996, blockSize=2), 
termVectorsFormat=CompressingTermVectorsFormat(compressionMode=FAST_DECOMPRESSION,
 chunkSize=1, blockSize=2)), sim=RandomSimilarity(queryNorm=true,coord=no): 
{fieldname=DFR I(n)BZ(0.3), docId=DFR I(ne)L2, id=LM Jelinek-Mercer(0.700000)}, 
locale=hr, timezone=Etc/GMT+5
   [junit4]   2> NOTE: Linux 3.19.0-51-generic amd64/Oracle Corporation 9-ea 
(64-bit)/cpus=12,threads=1,free=422853016,total=526385152
   [junit4]   2> NOTE: All tests run in this JVM: [TestMaxPositionInOldIndex, 
TestLucene50DocValuesFormat]
   [junit4] Completed [4/4 (1!)] on J2 in 92.52s, 105 tests, 8 errors, 3 
skipped <<< FAILURES!

[...truncated 18 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, 8 errors, 11 ignored (11 
assumptions) [seed: D2DEA7708D1B350C]

Total time: 12 minutes 38 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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