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From "Bo Wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-76) killApplication doesn't fully kill application master
Date Sat, 01 Sep 2012 00:13:07 GMT
Bo Wang created YARN-76:

             Summary: killApplication doesn't fully kill application master
                 Key: YARN-76
                 URL: https://issues.apache.org/jira/browse/YARN-76
             Project: Hadoop YARN
          Issue Type: Bug
         Environment: Failed on MacOS. OK on Linux
            Reporter: Bo Wang

When client sends a ClientRMProtocol#killApplication to RM, the corresponding AM is supposed
to be killed. However, on Mac OS, the AM is still alive (w/o any interruption).

I figured out part of the reason after some debugging. NM starts a AM with command like "/bin/bash
-c /path/to/java SampleAM". This command is executed in a process (say with PID 0001), which
starts another Java process (say with PID 0002). When NM kills the AM, it send SIGTERM and
then SIGKILL to the bash process (PID 0001). In Linux, the death of the bash process (PID
0001) will trigger the kill of the Java process (PID 0002). However, in Mac OS, only the bash
process is killed. The Java process is in the wild since then.

Note: on Mac OS, DefaultContainerExecutor is used rather than LinuxContainerExecutor.

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