[jira] [Commented] (FLINK-27481) Flink checkpoints are very slow after upgrading from Flink 1.13.1 to Flink 1.14.3

["Sebastian Mattheis (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-27481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17534723#comment-17534723 ] 

Sebastian Mattheis commented on FLINK-27481:
--------------------------------------------

Thanks for reporting the problem. This may indeed be a bug. However, I think we need some more information. You would help us best if you could include the following:
 * Screenshot of the jobgraph (The one with backpressure stats.) to get an overview of the tasks
 * Screenshots of operator/sub-task details of checkpointing (expand the plus symbol in the UI) <-- If you could include this for for version 1.13.x and 1.14.x it would be best to compare.
 * Log of the JobManager as it may be a problem on that side.

Best, Sebastian

> Flink checkpoints are very slow after upgrading from Flink 1.13.1 to Flink 1.14.3
> ---------------------------------------------------------------------------------
>
>                 Key: FLINK-27481
>                 URL: https://issues.apache.org/jira/browse/FLINK-27481
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Checkpointing
>    Affects Versions: 1.14.3, 1.14.4
>            Reporter: Monika Hristova
>            Priority: Major
>
> I am experiencing extremely slow checkpoints after upgrading flink version from 1.13.1 to 1.14.3. The checkpointing is slow because of the sink/source. Example [!https://i.stack.imgur.com/oChk9.png!|https://i.stack.imgur.com/oChk9.png]
> This source is a kafka topic that have some messages inside and still, it might take up to minutes to be checkpointed.
> I am using incremental checkpoints, unaligned checkpoints are not enabled. Configurations are the default ones, and this source was checkpointed for milliseconds with flink 1.13.1 and now it times out(the timeout is 3 minutes) for every second chechpoint.
> [!https://i.stack.imgur.com/kTbSx.png!|https://i.stack.imgur.com/kTbSx.png]
> [FlinkKafkaConsumer|https://nightlies.apache.org/flink/flink-docs-release-1.14/api/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumer.html]/[Producer|https://nightlies.apache.org/flink/flink-docs-release-1.14/api/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer.html] are used which are deprecated.
>  
> After removing the topic with the few configurational messages the checkpoint time improved drastically but it still takes around a minute for the checkpoint due to alignment duration in the kafka sinks. 
>  
> [Link |https://stackoverflow.com/questions/70986139/flink-checkpoints-are-very-slow-after-upgrading-from-flink-1-13-1-to-flink-1-14]to stackoverflow discusstion



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