[jira] [Commented] (FLINK-3310) Add back pressure statistics to web frontend

["Maximilian Michels (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-3310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15128559#comment-15128559 ] 

Maximilian Michels commented on FLINK-3310:
-------------------------------------------

I also created an issue some time ago: FLINK-3127

> Add back pressure statistics to web frontend
> --------------------------------------------
>
>                 Key: FLINK-3310
>                 URL: https://issues.apache.org/jira/browse/FLINK-3310
>             Project: Flink
>          Issue Type: Improvement
>          Components: Webfrontend
>            Reporter: Ufuk Celebi
>            Assignee: Ufuk Celebi
>            Priority: Minor
>
> When a task is receiving data at a higher rate than it can process, the task is back pressuring preceding tasks. Currently, there is no way to tell whether this is the case or not. An indicator for back pressure is tasks being stuck in buffer requests on the network stack. This means that they have filled all their buffers with data, but the following tasks/network are not consuming them fast enough.
> A simple way to measure back pressure is to sample running tasks and report back pressure if they are stuck in the blocking buffers calls.



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