Ted Yu created HDFS-5705: ---------------------------- Summary: 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
>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(). -- This message was sent by Atlassian JIRA (v6.1.5#6160)