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https://issues.apache.org/jira/browse/FLINK-12576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16849862#comment-16849862
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aitozi commented on FLINK-12576:
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Hi, [~pnowojski] I check the code, for localInputChannel do we just have to
count the buffer queued in resultsubpartition? I think the outQueueLength of
localInputChannel should equal to the inputQueueLength, right?
> inputQueueLength metric does not work for LocalInputChannels
> ------------------------------------------------------------
>
> Key: FLINK-12576
> URL: https://issues.apache.org/jira/browse/FLINK-12576
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Metrics, Runtime / Network
> Affects Versions: 1.6.4, 1.7.2, 1.8.0
> Reporter: Piotr Nowojski
> Assignee: aitozi
> Priority: Major
>
> Currently {{inputQueueLength}} ignores LocalInputChannels
> ({{SingleInputGate#getNumberOfQueuedBuffers}}). This can can cause mistakes
> when looking for causes of back pressure (If task is back pressuring whole
> Flink job, but there is a data skew and only local input channels are being
> used).
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