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Posted to issues@flink.apache.org by "eugen yushin (JIRA)" <ji...@apache.org> on 2018/09/02 10:29:00 UTC
[jira] [Comment Edited] (FLINK-10050) Support 'allowedLateness' in
CoGroupedStreams
[ https://issues.apache.org/jira/browse/FLINK-10050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16601172#comment-16601172 ]
eugen yushin edited comment on FLINK-10050 at 9/2/18 10:28 AM:
---------------------------------------------------------------
[~aljoscha], [~till.rohrmann]
Guys, please can you take a look at PR?
I didn't add unit tests because of:
a. there're no mock tests for referenced files in master branch to cover such kind of delegates as evictor/trigger/...
b. 'allowedLateness' is a feature of WindowedStream, and proposed fix simply delegates all the work to WindowedStream logic
Regards
was (Author: eyushin):
[~aljoscha], [~till.rohrmann]
Guys, please can you take a look at PR?
I didn't add unit tests because of:
a. there're no mock tests for referenced files in master branch to cover such kind of delegates as evictor/trigger/...
b. 'allowedLateness' is an feature of WindowedStream, and proposed fix simply delegates all the work to WindowedStream logic
Regards
> Support 'allowedLateness' in CoGroupedStreams
> ---------------------------------------------
>
> Key: FLINK-10050
> URL: https://issues.apache.org/jira/browse/FLINK-10050
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Affects Versions: 1.5.1, 1.6.0
> Reporter: eugen yushin
> Priority: Major
> Labels: pull-request-available, ready-to-commit, windows
>
> WindowedStream has a support of 'allowedLateness' feature, while CoGroupedStreams are not. At the mean time, WindowedStream is an inner part of CoGroupedStreams and all main functionality (like evictor/trigger/...) is simply delegated to WindowedStream.
> There's no chance to operate with late arriving data from previous steps in cogroups (and joins). Consider the following flow:
> a. read data from source1 -> aggregate data with allowed lateness
> b. read data from source2 -> aggregate data with allowed lateness
> c. cogroup/join streams a and b, and compare aggregated values
> Step c doesn't accept any late data from steps a/b due to lack of `allowedLateness` API call in CoGroupedStreams.java.
> Scope: add method `WithWindow.allowedLateness` to Java API (flink-streaming-java) and extend scala API (flink-streaming-scala).
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