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  1. Hadoop HDFS
  2. HDFS-9445

Datanode may deadlock while handling a bad volume

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Details

    • Bug
    • Status: Closed
    • Blocker
    • Resolution: Fixed
    • 2.7.2
    • 2.8.0, 2.7.2, 2.6.4, 3.0.0-alpha1
    • None
    • None
    • Reviewed

    Description

      Found one Java-level deadlock:
      =============================
      "DataXceiver for client DFSClient_attempt_xxx at /1.2.3.4:100 [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"
      

      Attachments

        1. HDFS-9445.00.patch
          5 kB
          Walter Su
        2. HDFS-9445.01.patch
          8 kB
          Walter Su
        3. HDFS-9445.02.patch
          7 kB
          Walter Su
        4. HDFS-9445-branch-2.6_02.patch
          7 kB
          Walter Su
        5. HDFS-9445-branch-2.6.02.patch
          7 kB
          Akira Ajisaka

        Activity

          People

            walter.k.su Walter Su
            kihwal Kihwal Lee
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            Dates

              Created:
              Updated:
              Resolved: