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From "Eric Badger (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13709) Clean up subprocesses spawned by Shell.java:runCommand when the shell process exits
Date Thu, 13 Oct 2016 22:43:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15573445#comment-15573445
] 

Eric Badger commented on HADOOP-13709:
--------------------------------------

Thanks, [~jlowe], [~daryn]. I will work on a patch that implements a shutdown hook to destroy
all of the created subprocesses. 

> Clean up subprocesses spawned by Shell.java:runCommand when the shell process exits
> -----------------------------------------------------------------------------------
>
>                 Key: HADOOP-13709
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13709
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>            Reporter: Eric Badger
>            Assignee: Eric Badger
>         Attachments: HADOOP-13709.001.patch
>
>
> The runCommand code in Shell.java can get into a situation where it will ignore InterruptedExceptions
and refuse to shutdown due to being in I/O waiting for the return value of the subprocess
that was spawned. We need to allow for the subprocess to be interrupted and killed when the
shell process gets killed. Currently the JVM will shutdown and all of the subprocesses will
be orphaned and not killed.



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