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https://issues.apache.org/jira/browse/HADOOP-7331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13039479#comment-13039479
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Todd Lipcon commented on HADOOP-7331:
-------------------------------------
I think we need something a lot more involved to really do a useful job of
this. The issue is that most of our daemons start and then exit a few seconds
after startup (eg once the JVM has loaded and it has had a chance to do some
basic initialization). For example, with an invalid config or bind address,
hadoop-daemon.sh will still return 0 in this case.
Regarding the patch itself: no need to use wc -l on the output of {{ps}}.
Instead, something like:
{code}
if ! ps -p $! > /dev/null ; then
exit 1
fi
{code}
since ps has a non-zero exit code if the process is running.
> Makes hadoop-daemon.sh to return 1 if daemon processes did not get started
> --------------------------------------------------------------------------
>
> Key: HADOOP-7331
> URL: https://issues.apache.org/jira/browse/HADOOP-7331
> Project: Hadoop Common
> Issue Type: Improvement
> Components: scripts
> Affects Versions: 0.23.0
> Reporter: Tanping Wang
> Assignee: Tanping Wang
> Priority: Trivial
> Fix For: 0.23.0
>
> Attachments: HADOOP-7331.patch
>
>
> Makes hadoop-daemon.sh to return 1 if daemon processes did not get started.
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