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https://issues.apache.org/jira/browse/HDFS-16213?focusedWorklogId=648242&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-648242
]
ASF GitHub Bot logged work on HDFS-16213:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 08/Sep/21 21:52
Start Date: 08/Sep/21 21:52
Worklog Time Spent: 10m
Work Description: LeonGao91 commented on pull request #3386:
URL: https://github.com/apache/hadoop/pull/3386#issuecomment-915598330
Thanks @virajjasani for reporting this issue!
Seems like this happens consistently when running the same test multiple
times, but doesn't fail when running it the first time (happy case), like you
mentioned, this can reproduce it consistently:
@Test
public void t1() throws Exception {
testDnRestartWithHardLink();
testDnRestartWithHardLink();
}
Based on this I am not sure if the root cause is the rare race condition you
mentioned. I suspect it is due to the cache behavior when rerun the same code
the replica loading changed a little bit.
I can spend some more time investigating in the next few days. Let's try to
fix this in the unit test itself
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Issue Time Tracking
-------------------
Worklog Id: (was: 648242)
Time Spent: 3.5h (was: 3h 20m)
> Flaky test TestFsDatasetImpl#testDnRestartWithHardLink
> ------------------------------------------------------
>
> Key: HDFS-16213
> URL: https://issues.apache.org/jira/browse/HDFS-16213
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Labels: pull-request-available
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
> Failure case:
> [here|https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3359/4/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt]
> {code:java}
> [ERROR]
> testDnRestartWithHardLink(org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.TestFsDatasetImpl)
> Time elapsed: 7.768 s <<< FAILURE![ERROR]
> testDnRestartWithHardLink(org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.TestFsDatasetImpl)
> Time elapsed: 7.768 s <<< FAILURE!java.lang.AssertionError at
> org.junit.Assert.fail(Assert.java:87) at
> org.junit.Assert.assertTrue(Assert.java:42) at
> org.junit.Assert.assertTrue(Assert.java:53) at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.TestFsDatasetImpl.testDnRestartWithHardLink(TestFsDatasetImpl.java:1344)
> 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:498) at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:299)
> at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:293)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266) at
> java.lang.Thread.run(Thread.java:748)
> {code}
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