[
https://issues.apache.org/jira/browse/BEAM-315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15309976#comment-15309976
]
Aljoscha Krettek commented on BEAM-315:
---------------------------------------
I played around this morning and finally found the problem thanks to
[~frances]'s remark.
The problem is that the Flink {{KvCoderComparator}} (this is used to do
comparisons/hasing for shuffle and sorting) uses the hash of the key instead of
the hash of the encoded key while using the encoded key for doing comparisons.
I already fixed it, but I want to include a test for this as well.
[~pawelszc...@gmail.com], can I include a modified version of your program as a
test?
> GroupByKey/CoGroupByKey doesn't group correctly in batch mode of
> FlinkPipelineRunner
> ------------------------------------------------------------------------------------
>
> Key: BEAM-315
> URL: https://issues.apache.org/jira/browse/BEAM-315
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Affects Versions: 0.1.0-incubating
> Reporter: Pawel Szczur
> Attachments: CoGroupPipelineStringKey.java
>
>
> Same keys are processed multiple times.
> A repo to reproduce the bug:
> https://github.com/orian/cogroup-wrong-grouping
> Discussion:
> http://mail-archives.apache.org/mod_mbox/incubator-beam-user/201605.mbox/%3CCAB2uKkG2xHsWpLFUkYnt8eEzdxU%3DB_nu6crTwVi-ZuUpugxkPQ%40mail.gmail.com%3E
> Notice: I haven't tested other runners (didn't manage to configure Spark).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
