[jira] [Resolved] (SPARK-6952) spark-daemon.sh PID reuse check fails on long classpath

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-6952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen resolved SPARK-6952.
------------------------------
       Resolution: Fixed
    Fix Version/s: 1.4.0

Issue resolved by pull request 5535
[https://github.com/apache/spark/pull/5535]

> spark-daemon.sh PID reuse check fails on long classpath
> -------------------------------------------------------
>
>                 Key: SPARK-6952
>                 URL: https://issues.apache.org/jira/browse/SPARK-6952
>             Project: Spark
>          Issue Type: Bug
>          Components: Deploy
>    Affects Versions: 1.3.0
>            Reporter: Punya Biswal
>             Fix For: 1.4.0
>
>
> {{sbin/spark-daemon.sh}} uses {{ps -p "$TARGET_PID" -o args=}} to figure out whether the process running with the expected PID is actually a Spark daemon. When running with a large classpath, the output of {{ps}} gets truncated and the check fails spuriously.
> I think we should weaken the check to see if it's a java command (which is something we do in other parts of the script) rather than looking for the specific main class name. This means that SPARK-4832 might happen under a slightly broader range of circumstances (a *java* program happened to reuse the same PID), but it seems worthwhile compared to failing consistently with a large classpath.



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