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From "Jerry Cwiklik (JIRA)" <...@uima.apache.org>
Subject [jira] [Updated] (UIMA-4643) DUCC Agent logs exceptions while collecting metrics from dead process
Date Thu, 08 Oct 2015 18:25:26 GMT

     [ https://issues.apache.org/jira/browse/UIMA-4643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jerry Cwiklik updated UIMA-4643:
--------------------------------
    Fix Version/s:     (was: 2.0.1-Ducc)

> DUCC Agent logs exceptions while collecting metrics from dead process 
> ----------------------------------------------------------------------
>
>                 Key: UIMA-4643
>                 URL: https://issues.apache.org/jira/browse/UIMA-4643
>             Project: UIMA
>          Issue Type: Bug
>          Components: DUCC
>            Reporter: Jerry Cwiklik
>            Assignee: Jerry Cwiklik
>             Fix For: 2.1.0-Ducc
>
>
> The agent tries to access /proc/PID/statm and also tries to collect metrics via JMX from
a process that may no longer be running producing exceptions in an agent log. The process
metric collector runs at regular interval in a dedicated thread driven by a camel timer route.
There seems to be a race condition when a process exits and before an agent can change its
internal state, the metric collector thread attempts to access statm which is no longer in
there.
> When an exception is caught, check the state of the process and if it is not running
dont log an exception



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