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From "Eric Badger (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-13709) Clean up subprocesses spawned by Shell.java:runCommand when the shell process exits
Date Fri, 02 Dec 2016 17:43:58 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Badger updated HADOOP-13709:
---------------------------------
    Attachment: HADOOP-13709.008.patch

That all makes sense, [~jlowe]. I believe that I've fixed those all now. I left the synchronized
map in and just got rid of the redundant synchronized blocks. Let me know if you'd rather
use a regular map along with the synchronized blocks. 

> 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, HADOOP-13709.002.patch, HADOOP-13709.003.patch,
HADOOP-13709.004.patch, HADOOP-13709.005.patch, HADOOP-13709.006.patch, HADOOP-13709.007.patch,
HADOOP-13709.008.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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