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Posted to dev@uima.apache.org by "Jerry Cwiklik (JIRA)" <de...@uima.apache.org> on 2013/12/20 18:18:14 UTC

[jira] [Updated] (UIMA-3087) Fix NPE in Ducc Agent

     [ https://issues.apache.org/jira/browse/UIMA-3087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jerry Cwiklik updated UIMA-3087:
--------------------------------

    Fix Version/s: 1.0-Ducc

> Fix NPE in Ducc Agent 
> ----------------------
>
>                 Key: UIMA-3087
>                 URL: https://issues.apache.org/jira/browse/UIMA-3087
>             Project: UIMA
>          Issue Type: Bug
>          Components: DUCC
>    Affects Versions: 1.0-Ducc
>            Reporter: Jerry Cwiklik
>            Assignee: Jerry Cwiklik
>             Fix For: 1.0-Ducc
>
>
> There is NPE occuring in the Agent's DuccGarbageStatsCollector. The collector is meant to collect GC information via JMX. This collector is periodically running under the control of Camel route which starts immediately after the process is launched. It seems like there is a race where the route is stating ahead of the process. Modify code to start the route only when the process reports back to the agent. For some reason the route is currently starting in CommandExecutor.postExecStep() and apparently a reference to a Process object is not yet valid causing the NPE



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