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https://issues.apache.org/jira/browse/BEAM-2486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16075681#comment-16075681
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ASF GitHub Bot commented on BEAM-2486:
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GitHub user kennknowles opened a pull request:
https://github.com/apache/beam/pull/3502
[BEAM-2486] Reject stateful ParDo if coder not deterministic KvCoder
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---
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kennknowles/beam state-KV
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/beam/pull/3502.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3502
----
commit 5a5445f237e84a4092158c45bb93af0c0b05b69d
Author: Kenneth Knowles <[email protected]>
Date: 2017-07-06T00:24:25Z
Reject stateful ParDo if coder not deterministic KvCoder
----
> Should throws some useful messages when statefulParDo use non-KV input
> ----------------------------------------------------------------------
>
> Key: BEAM-2486
> URL: https://issues.apache.org/jira/browse/BEAM-2486
> Project: Beam
> Issue Type: Improvement
> Components: runner-core, runner-flink
> Reporter: Jingsong Lee
> Assignee: Kenneth Knowles
> Fix For: 2.2.0
>
>
> Now Flink runner will throws a ClassCastException without detail messages
> when a statefulParDo use non-KV input. It is not easy for users to find
> errors and causes.
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