[jira] [Commented] (FLINK-10949) When use flink-1.6.2's intervalJoin funtion, the thread is stucked in rockdb's seek for too long time

["Stefan Richter (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-10949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16714613#comment-16714613 ] 

Stefan Richter commented on FLINK-10949:
----------------------------------------

Is there any new insight or update on this or can we close the issue?

> When use flink-1.6.2's intervalJoin funtion, the thread is stucked in rockdb's seek for too long time
> -----------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-10949
>                 URL: https://issues.apache.org/jira/browse/FLINK-10949
>             Project: Flink
>          Issue Type: Bug
>          Components: State Backends, Checkpointing
>    Affects Versions: 1.6.2
>         Environment: flink1.6.2, linux
>            Reporter: Liu
>            Priority: Major
>              Labels: features, performance
>
> 0down vote [favorite|https://stackoverflow.com/questions/53393775/when-use-flink-1-6-2s-intervaljoin-funtion-the-thread-is-stucked-in-seek-for-t]
>   
>  I am using IntervalJoin function to join two streams within 10 minutes. As below:
>  
>  {{labelStream.intervalJoin(adLogStream)}}
>                          .between(Time.milliseconds(0), Time.milliseconds(600000)) 
>  {{           .process(new processFunction())}}
>  {{           .sink(kafkaProducer)}}
>  labelStream and adLogStream are proto-buf class that are keyed by Long id.
> Our two input-streams are huge. After running about 30minutes, the output to kafka go down slowly, like this: 
> !https://i.stack.imgur.com/UW4V1.png!
> When data output begins going down, I use jstack and pstack sevaral times to get these: 
> !https://i.stack.imgur.com/uxOZn.png!
> !https://i.stack.imgur.com/JTyIC.png!
> It seems the program is stucked in rockdb's seek. And I find that some rockdb's srt file are accessed slowly by iteration. [!https://i.stack.imgur.com/Avdyo.png!|https://i.stack.imgur.com/Avdyo.png]
> I have tried several ways:
> {{1)Reduce the input amount to half. This works well.}}
> 2)Replace labelStream and adLogStream with simple Strings. This way, data amount will not change. This works well.}}
> 3)Use PredefinedOptions like SPINNING_DISK_OPTIMIZED and SPINNING_DISK_OPTIMIZED_HIGH_MEM. This still fails.}}
> 4)Use new versions of rocksdbjni. This still fails.}}
> {{Can anyone give me some suggestions? Thank you very much.}}



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