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https://issues.apache.org/jira/browse/FLINK-13384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16891059#comment-16891059
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Till Rohrmann commented on FLINK-13384:
---------------------------------------

Would it work to fix the issue by increasing the sampling size and leave the 
proper fix for the sources for later if this is a bigger endeavor? I think this 
issue might resolve itself once we have the new source interface.

> The backpressure monitoring does not work for StreamSources
> -----------------------------------------------------------
>
>                 Key: FLINK-13384
>                 URL: https://issues.apache.org/jira/browse/FLINK-13384
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Metrics, Runtime / Task
>    Affects Versions: 1.9.0
>            Reporter: Dawid Wysakowicz
>            Assignee: Dawid Wysakowicz
>            Priority: Blocker
>             Fix For: 1.9.0
>
>
> I think it is caused by: [FLINK-12483]. The reason is that the 
> {{BackPressureStatsTrackerImpl}} samples only the main thread. FLINK-12483 
> introduced a separate thread for executing the sources in the mailbox model. 
> It is similar to other old bug that concerned only Kafka source: [FLINK-3456]



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