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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9445) Deadlock in datanode
Date Fri, 20 Nov 2015 16:41:11 GMT
Kihwal Lee created HDFS-9445:
--------------------------------

             Summary: Deadlock in datanode
                 Key: HDFS-9445
                 URL: https://issues.apache.org/jira/browse/HDFS-9445
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Kihwal Lee
            Priority: Blocker


{noformat}
Found one Java-level deadlock:
=============================
"DataXceiver for client DFSClient_attempt_xxx at /10.217.77.219:52900 [Sending block BP-xxxxx:blk_123_456]":
  waiting to lock monitor 0x00007f77d0731768 (object 0x00000000d60d9930, a org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl),
  which is held by "Thread-565"
"Thread-565":
  waiting for ownable synchronizer 0x00000000d55613c8, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
  which is held by "DataNode: heartbeating to my-nn:8020"
"DataNode: heartbeating to my-nn:8020":
  waiting to lock monitor 0x00007f77d0731768 (object 0x00000000d60d9930, a org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl),
  which is held by "Thread-565"
{noformat}



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