Process cannot exit when there is many RPC readers more that actual client
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Key: HADOOP-7689
URL: https://issues.apache.org/jira/browse/HADOOP-7689
Project: Hadoop Common
Issue Type: Bug
Components: ipc
Affects Versions: 0.21.0
Environment: local
Reporter: Denny Ye
I met a strange issue that process cannot exit when I run RPC test cases in my
Eclipse.
Conditions:
1. Only one Server and one client(local)
2. I have set many readers(conf.setInt("ipc.server.read.threadpool.size", 5)),
it great than client number.
After any test cases, the process cannot exit. I tested with several cases and
found the root cause.
RPC serves socket with reader(transferring binary to Call), and even shutdown
the thread pool. But all the free readers are blocked at
"readSelector.select()" (they are useless by Listener)
Those threads and process cannot exit always.
It can be fixed by invoking corresponding selector for each reader.The same
thing was done at 0.20 version.
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