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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5760) Task process hanging on an RPC call
Date Thu, 30 Apr 2009 17:46:30 GMT
Task process hanging on an RPC call
-----------------------------------

                 Key: HADOOP-5760
                 URL: https://issues.apache.org/jira/browse/HADOOP-5760
             Project: Hadoop Core
          Issue Type: Bug
          Components: ipc
            Reporter: Devaraj Das


On a random node on a cluster, I found one task process waiting on an RPC call. The process
has been in that state for a few days at least.

"main" prio=10 tid=0x08069400 nid=0x6f52 in Object.wait() [0xf7e6c000..0xf7e6d1f8]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0xf1215700> (a org.apache.hadoop.ipc.Client$Call)
        at java.lang.Object.wait(Object.java:485)
        at org.apache.hadoop.ipc.Client.call(Client.java:725)
        - locked <0xf1215700> (a org.apache.hadoop.ipc.Client$Call)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
        at org.apache.hadoop.mapred.$Proxy0.statusUpdate(Unknown Source)
        at org.apache.hadoop.mapred.Task.statusUpdate(Task.java:691)
        at org.apache.hadoop.mapred.Task.taskCleanup(Task.java:795)
        at org.apache.hadoop.mapred.Child.main(Child.java:176)

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