Rushabh S Shah created HDFS-10878:
-------------------------------------
Summary: TestDFSClientRetries#testIdempotentAllocateBlockAndClose
throwing ConcurrentModificationException
Key: HDFS-10878
URL: https://issues.apache.org/jira/browse/HDFS-10878
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client
Affects Versions: 2.7.3
Reporter: Rushabh S Shah
Assignee: Rushabh S Shah
This failed in out internal build
{noformat}
java.util.ConcurrentModificationException: null
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.next(ArrayList.java:851)
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoContiguousUnderConstruction.appendUCParts(BlockInfoContiguousUnderConstruction.java:396)
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoContiguousUnderConstruction.appendStringTo(BlockInfoContiguousUnderConstruction.java:382)
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoContiguousUnderConstruction.toString(BlockInfoContiguousUnderConstruction.java:375)
at java.lang.String.valueOf(String.java:2982)
at java.lang.StringBuilder.append(StringBuilder.java:131)
at
org.apache.hadoop.hdfs.protocol.ExtendedBlock.toString(ExtendedBlock.java:121)
at com.google.common.base.Joiner.toString(Joiner.java:533)
at com.google.common.base.Joiner.appendTo(Joiner.java:124)
at com.google.common.base.Joiner.appendTo(Joiner.java:181)
at com.google.common.base.Joiner.join(Joiner.java:237)
at com.google.common.base.Joiner.join(Joiner.java:226)
at com.google.common.base.Joiner.join(Joiner.java:245)
at
org.apache.hadoop.hdfs.TestDFSClientRetries$3.answer(TestDFSClientRetries.java:485)
at
org.apache.hadoop.hdfs.TestDFSClientRetries$3.answer(TestDFSClientRetries.java:477)
at
org.mockito.internal.stubbing.StubbedInvocationMatcher.answer(StubbedInvocationMatcher.java:31)
at org.mockito.internal.MockHandler.handle(MockHandler.java:97)
at
org.mockito.internal.creation.MethodInterceptorFilter.intercept(MethodInterceptorFilter.java:47)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer$$EnhancerByMockitoWithCGLIB$$cca97ed1.complete(<generated>)
at
org.apache.hadoop.hdfs.DFSOutputStream.completeFile(DFSOutputStream.java:2303)
at
org.apache.hadoop.hdfs.DFSOutputStream.closeImpl(DFSOutputStream.java:2279)
at
org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:2243)
at
org.apache.hadoop.hdfs.TestDFSClientRetries.testIdempotentAllocateBlockAndClose(TestDFSClientRetries.java:507)
{noformat}
Its getting NPE in following Log message
{code:title=TestDFSClientRetries.java|borderStyle=solid}
@Test
public void testIdempotentAllocateBlockAndClose() throws Exception {
...
public Boolean answer(InvocationOnMock invocation) throws Throwable
{
// complete() may return false a few times before it returns
// true. We want to wait until it returns true, and then
// make it retry one more time after that.
LOG.info("Called complete(: " +
Joiner.on(",").join(invocation.getArguments()) + ")");
...
}
{code}
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