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Type:
Bug
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Status: Resolved
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Priority:
Blocker
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Resolution: Fixed
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Affects Version/s: 0.18.3, 0.19.0, 0.19.1, 0.19.2, 0.20.0, 0.20.1
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Fix Version/s: 0.20.2
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Component/s: ipc
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Labels:None
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Hadoop Flags:Reviewed
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Release Note:Correct synchronization error in IPC where handler thread could hang if request reader got an error.
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)
- duplicates
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HADOOP-5760 Task process hanging on an RPC call
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- Resolved
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