Uploaded image for project: 'Hadoop HDFS'
  1. Hadoop HDFS
  2. HDFS-9659

EditLogTailerThread to Active Namenode RPC should timeout

VotersStop watchingWatchersCreate sub-taskLinkCloneUpdate Comment AuthorReplace String in CommentUpdate Comment VisibilityDelete Comments
    XMLWordPrintableJSON

Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • 3.0.0-alpha1
    • 3.0.0-alpha1
    • ha, namenode
    • None
    • Reviewed

    Description

      EditLogTailerThread to Active Namenode RPC doesn't have timeout and it’s removed in HDFS-6440.

      When inject the disk slow and consume system IO to the active name node, the nameservice can't switch and this is because SNN not able to stop EditLogTailerThread.

      Thread dump from SNN

      "IPC Server handler 33 on 25000" #118 daemon prio=5 os_prio=0 tid=0x00007f2384409800 nid=0x26c89 in Object.wait() [0x00007f2376ac7000]
         java.lang.Thread.State: WAITING (on object monitor)
      	at java.lang.Object.wait(Native Method)
      	at java.lang.Thread.join(Thread.java:1245)
      	- locked <0x00000006d517f538> (a org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread)
      	at java.lang.Thread.join(Thread.java:1319)
      	at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.stop(EditLogTailer.java:183)
      	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.stopStandbyServices(FSNamesystem.java:1284)
      	at org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.stopStandbyServices(NameNode.java:1852)
      	at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.exitState(StandbyState.java:72)
      	at org.apache.hadoop.hdfs.server.namenode.ha.HAState.setStateInternal(HAState.java:62)
      	at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.setState(StandbyState.java:49)
      	at org.apache.hadoop.hdfs.server.namenode.NameNode.transitionToActive(NameNode.java:1684)
      

      Thread dump for EditLogTailerThread, it is stuck in NamenodeProtocolTranslatorPB.rollEditLog() rpc call.

      "Edit log tailer" #150 prio=5 os_prio=0 tid=0x00007f2395569800 nid=0x26cac in Object.wait() [0x00007f2374aa7000]
         java.lang.Thread.State: WAITING (on object monitor)
      	at java.lang.Object.wait(Native Method)
      	at java.lang.Object.wait(Object.java:502)
      	at org.apache.hadoop.ipc.Client.call(Client.java:1503)
      	- locked <0x00000006d581bb90> (a org.apache.hadoop.ipc.Client$Call)
      	at org.apache.hadoop.ipc.Client.call(Client.java:1448)
      	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
      	at com.sun.proxy.$Proxy16.rollEditLog(Unknown Source)
      	at org.apache.hadoop.hdfs.protocolPB.NamenodeProtocolTranslatorPB.rollEditLog(NamenodeProtocolTranslatorPB.java:148)
      	at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$2.doWork(EditLogTailer.java:301)
      	at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$2.doWork(EditLogTailer.java:298)
      	at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$MultipleNameNodeProxy.call(EditLogTailer.java:420)
      

      Attachments

        1. HDFS-9659.patch
          1 kB
          Surendra Singh Lilhore
        2. HDFS-9659.01.patch
          2 kB
          Surendra Singh Lilhore
        3. HDFS-9659.02.patch
          1 kB
          Surendra Singh Lilhore

        Issue Links

        Activity

          This comment will be Viewable by All Users Viewable by All Users
          Cancel

          People

            surendralilhore Surendra Singh Lilhore
            surendralilhore Surendra Singh Lilhore
            Votes:
            0 Vote for this issue
            Watchers:
            8 Stop watching this issue

            Dates

              Created:
              Updated:
              Resolved:

              Slack

                Issue deployment