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From "David B Dean (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-22473) shell.process_executor races process exit
Date Thu, 23 Nov 2017 03:07:00 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-22473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16263730#comment-16263730
] 

David B Dean commented on AMBARI-22473:
---------------------------------------

For further reference, I work with Jonathan, and this is the bug that is causing the problems
I outlined at https://community.hortonworks.com/questions/147790/timeout-error-in-namenode-installation-on-new-clus.html.

> shell.process_executor races process exit
> -----------------------------------------
>
>                 Key: AMBARI-22473
>                 URL: https://issues.apache.org/jira/browse/AMBARI-22473
>             Project: Ambari
>          Issue Type: Bug
>    Affects Versions: 2.6.0
>            Reporter: Jonathan Matthew
>         Attachments: 0001-AMBARI-22473-shell.process_executor-races-process-ex.patch
>
>
> By calling cmd.poll(), shell.process_executor assumes that the subcommand will have exited
once it has finished reading from its stdout pipe. This isn't necessarily the case, so it
should call cmd.wait() instead.



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