Uma Maheswara Rao G created HDFS-3616:
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Summary: ConcurrentModificationException in DN shutdown.
Key: HDFS-3616
URL: https://issues.apache.org/jira/browse/HDFS-3616
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 2.0.0-alpha, 3.0.0
Reporter: Uma Maheswara Rao G
I have seen this in precommit build #2743
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java.util.ConcurrentModificationException
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:209)
at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeList.shutdown(FsVolumeList.java:168)
at
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.shutdown(FsDatasetImpl.java:1214)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.shutdown(DataNode.java:1105)
at
org.apache.hadoop.hdfs.MiniDFSCluster.shutdownDataNodes(MiniDFSCluster.java:1324)
at
org.apache.hadoop.hdfs.MiniDFSCluster.shutdown(MiniDFSCluster.java:1304)
at
org.apache.hadoop.hdfs.web.TestWebHdfsWithMultipleNameNodes.shutdownCluster(TestWebHdfsWithMultipleNameNodes.java:100)
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