[
https://issues.apache.org/jira/browse/HDFS-5705?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ted Yu updated HDFS-5705:
-------------------------
Status: Patch Available (was: Open)
> TestSecondaryNameNodeUpgrade#testChangeNsIDFails may fail due to
> ConcurrentModificationException
> ------------------------------------------------------------------------------------------------
>
> Key: HDFS-5705
> URL: https://issues.apache.org/jira/browse/HDFS-5705
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: hdfs-5705.html, hdfs-5705.txt
>
>
> From
> https://builds.apache.org/job/Hadoop-Hdfs-trunk/1626/testReport/org.apache.hadoop.hdfs.server.namenode/TestSecondaryNameNodeUpgrade/testChangeNsIDFails/
> :
> {code}
> java.util.ConcurrentModificationException: null
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
> at java.util.HashMap$EntryIterator.next(HashMap.java:834)
> at java.util.HashMap$EntryIterator.next(HashMap.java:832)
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl.shutdown(FsVolumeImpl.java:251)
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeList.shutdown(FsVolumeList.java:218)
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.shutdown(FsDatasetImpl.java:1414)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.shutdown(DataNode.java:1309)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.shutdownDataNodes(MiniDFSCluster.java:1464)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:1439)
> at
> org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:1423)
> at
> org.apache.hadoop.hdfs.server.namenode.TestSecondaryNameNodeUpgrade.doIt(TestSecondaryNameNodeUpgrade.java:97)
> at
> org.apache.hadoop.hdfs.server.namenode.TestSecondaryNameNodeUpgrade.testChangeNsIDFails(TestSecondaryNameNodeUpgrade.java:116)
> {code}
> The above happens when shutdown() is called in parallel to addBlockPool() or
> shutdownBlockPool().
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