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Xiao Chen commented on HDFS-8915: --------------------------------- Thanks for the fix. Linking HDFS-8883 here to make it more explicit. > TestFSNamesystem.testFSLockGetWaiterCount fails intermittently in jenkins > ------------------------------------------------------------------------- > > Key: HDFS-8915 > URL: https://issues.apache.org/jira/browse/HDFS-8915 > Project: Hadoop HDFS > Issue Type: Bug > Components: test > Affects Versions: 2.8.0 > Reporter: Anu Engineer > Assignee: Masatake Iwasaki > Priority: Minor > Fix For: 2.7.4, 3.0.0-alpha1 > > Attachments: HDFS-8915.001.patch, HDFS-8915.002.patch > > > This test was added as part of HDFS-8883, There is a race condition in the > test and it has failed *once* in the Apache Jenkins run. > Here is the stack > FAILED: > org.apache.hadoop.hdfs.server.namenode.TestFSNamesystem.testFSLockGetWaiterCount > Error Message: > Expected number of blocked thread not found expected:<3> but was:<1> > Stack Trace: > java.lang.AssertionError: Expected number of blocked thread not found > expected:<3> but was:<1> > at org.junit.Assert.fail(Assert.java:88) > at org.junit.Assert.failNotEquals(Assert.java:743) > at org.junit.Assert.assertEquals(Assert.java:118) > at org.junit.Assert.assertEquals(Assert.java:555) > at > org.apache.hadoop.hdfs.server.namenode.TestFSNamesystem.testFSLockGetWaiterCount(TestFSNamesystem.java:261) > From cursory code reading , even though we call into readlock.lock() there is > no guarantee that our thread is put in the wait queue. A proposed fix could > be to check for any thread in the lock queue instead of all 3, or disable the > test. > It could also indicate an issue with the test infra-structure but any test > open to variations in result due to infra-structure issues creates noise in > tests so we are better off fixing it. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org