nemon lou created HADOOP-9655:
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Summary: IPC Client call to the same host with multi thread takes
very long time to report connection time out for many times
Key: HADOOP-9655
URL: https://issues.apache.org/jira/browse/HADOOP-9655
Project: Hadoop Common
Issue Type: Bug
Components: ipc
Affects Versions: 2.0.4-alpha
Reporter: nemon lou
When one machine power off during running a job ,MRAppMaster find tasks timed
out on that host and then call stop container for each container concurrently.
But the IPC layer did it serially, for each call,the connection time out
exception toke a few minutes to raise after 45 times reties. And AM hang for
many hours to wait for stopContainer to finish.
The jstack output file shows that most threads stuck at Connection.addCall
waiting for a lock object hold by Connection.setupIOstreams.
(The setupIOstreams method run slowlly becauseof connection time out during
setupconnection.)
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