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https://issues.apache.org/jira/browse/AMBARI-22473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16263730#comment-16263730
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David B Dean commented on AMBARI-22473:
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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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