[HADOOP-5760] Task process hanging on an RPC call

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: ipc
• Assignee: Unassigned
• Reporter: Devaraj Das
• Created: 30/Apr/09 17:45
• Updated: 22/Jul/14 19:19
• Resolved: 22/Jul/14 19:18

Description

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)

Issue Links

• is duplicated by: HADOOP-6498 IPC client bug may cause rpc call hang