[jira] [Created] (UIMA-4643) DUCC Agent logs exceptions while collecting metrics from dead process

["Jerry Cwiklik (JIRA)" <de...@uima.apache.org>]

Jerry Cwiklik created UIMA-4643:
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             Summary: 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, 2.0.1-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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