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https://issues.apache.org/jira/browse/HDFS-11660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wang updated HDFS-11660:
-------------------------------
Attachment: HDFS-11660.001.patch
Mockito mocking isn't threadsafe, so I think this happens when we insert the
mock for the heartbeat. Added a semaphore to pause all the BPOS threads before
mocking, and unpause after.
> TestFsDataset#testPageRounder fails intermittently with AssertionError
> ----------------------------------------------------------------------
>
> Key: HDFS-11660
> URL: https://issues.apache.org/jira/browse/HDFS-11660
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 2.6.5
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Attachments: HDFS-11660.001.patch
>
>
> We've seen this test fail occasionally with an error like the following:
> {noformat}
> java.lang.AssertionError
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:510)
> at
> org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:695)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> This assertion fires when the heartbeat response is null
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