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From "Ruyue Ma (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6498) IPC client bug may cause rpc call hang
Date Mon, 18 Jan 2010 16:22:54 GMT
IPC client  bug may cause rpc call hang
---------------------------------------

                 Key: HADOOP-6498
                 URL: https://issues.apache.org/jira/browse/HADOOP-6498
             Project: Hadoop Common
          Issue Type: Bug
          Components: ipc
    Affects Versions: 0.20.1, 0.20.0, 0.19.2, 0.19.1, 0.19.0, 0.18.3
            Reporter: Ruyue Ma
            Assignee: Ruyue Ma
            Priority: Critical
             Fix For: 0.21.0


I can reproduce some rpc call  hang bug when connection thread of ipc client receives response
for outstanding call. 

The stacks when hang occurs (TaskTracker):

  Waiting on org.apache.hadoop.ipc.Client$Call@1c3cbb4b
  Stack:
    java.lang.Object.wait(Native Method)
    java.lang.Object.wait(Object.java:485)
    org.apache.hadoop.ipc.Client.call(Client.java:691)
    org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
    org.apache.hadoop.mapred.$Proxy4.heartbeat(Unknown Source)
    org.apache.hadoop.mapred.TaskTracker.transmitHeartBeat(TaskTracker.java:1250)
    org.apache.hadoop.mapred.TaskTracker.offerService(TaskTracker.java:1082)
    org.apache.hadoop.mapred.TaskTracker.run(TaskTracker.java:1785)
    org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:2796)

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