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https://issues.apache.org/jira/browse/FLUME-2991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Denes Arvay updated FLUME-2991:
-------------------------------
    Description: 
It causes invalid data to appear in JMX monitoring and also makes 
{{TestExecSource.testMonitoredCounterGroup}} failing/flaky.

starting the `sourceCounter` before submitting the `ExecRunnable` to the 
`executor` solves the problem.

https://github.com/apache/flume/blob/trunk/flume-ng-core/src/main/java/org/apache/flume/source/ExecSource.java#L176-L183

  was:
It causes invalid data to appear in JMX monitoring and also makes 
`TestExecSource.testMonitoredCounterGroup` failing/flaky.

starting the `sourceCounter` before submitting the `ExecRunnable` to the 
`executor` solves the problem.

https://github.com/apache/flume/blob/trunk/flume-ng-core/src/main/java/org/apache/flume/source/ExecSource.java#L176-L183


> ExecSource command execution starts before starting the sourceCounter
> ---------------------------------------------------------------------
>
>                 Key: FLUME-2991
>                 URL: https://issues.apache.org/jira/browse/FLUME-2991
>             Project: Flume
>          Issue Type: Bug
>          Components: Sinks+Sources
>            Reporter: Denes Arvay
>            Assignee: Denes Arvay
>
> It causes invalid data to appear in JMX monitoring and also makes 
> {{TestExecSource.testMonitoredCounterGroup}} failing/flaky.
> starting the `sourceCounter` before submitting the `ExecRunnable` to the 
> `executor` solves the problem.
> https://github.com/apache/flume/blob/trunk/flume-ng-core/src/main/java/org/apache/flume/source/ExecSource.java#L176-L183



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