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https://issues.apache.org/jira/browse/FLINK-2292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14620768#comment-14620768
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ASF GitHub Bot commented on FLINK-2292:
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Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/896#issuecomment-120054333
The is a potential modification conflict: Drawing a snapshot for
serialization and registering a new accumulator can lead to a
ConcurrentModificationException in the drawing of the snapshot.
> Report accumulators periodically while job is running
> -----------------------------------------------------
>
> Key: FLINK-2292
> URL: https://issues.apache.org/jira/browse/FLINK-2292
> Project: Flink
> Issue Type: Sub-task
> Components: JobManager, TaskManager
> Reporter: Maximilian Michels
> Assignee: Maximilian Michels
> Fix For: 0.10
>
>
> Accumulators should be sent periodically, as part of the heartbeat that sends
> metrics. This allows them to be updated in real time.
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