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https://issues.apache.org/jira/browse/FLINK-6853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16038397#comment-16038397
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ASF GitHub Bot commented on FLINK-6853:
---------------------------------------
GitHub user tzulitai opened a pull request:
https://github.com/apache/flink/pull/4079
[FLINK-6853] [DataStream] Let StreamRecordSerializer be compatible with
MultiplexingStreamRecordSerializer
This PR lets `StreamRecordSerializer.ensureCompatibility` be tolerable for
config snapshots taken from the legacy `MultiplexingStreamRecordSerializer`.
This is required for users which originally used
`MultiplexingStreamRecordSerializer` to serialize stream elements as part of
their checkpointed state (e.g. FlinkCEP).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tzulitai/flink FLINK-6853
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4079.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 #4079
----
commit 54f5a33f8fb88d2219f06b6b874921d1d063ddca
Author: Tzu-Li (Gordon) Tai <[email protected]>
Date: 2017-06-06T08:41:03Z
[FLINK-6853] [DataStream] Let StreamRecordSerializer be compatible with
MultiplexingStreamRecordSerializer
This commit lets StreamRecordSerializer.ensureCompatibility be tolerable
for config snapshots taken from the legacy
MultiplexingStreamRecordSerializer. This is required for users which
originally used MultiplexingStreamRecordSerializer to serialize stream
elements as part of their checkpointed state (e.g. FlnkCEP).
----
> Migrating from Flink 1.1 fails for FlinkCEP
> -------------------------------------------
>
> Key: FLINK-6853
> URL: https://issues.apache.org/jira/browse/FLINK-6853
> Project: Flink
> Issue Type: Bug
> Components: CEP
> Affects Versions: 1.3.0
> Reporter: Tzu-Li (Gordon) Tai
> Assignee: Tzu-Li (Gordon) Tai
>
> Migrating from Flink 1.1 fails for CEP, since in 1.1, the legacy
> {{MultiplexingStreamRecordSerializer}} is used for stream elements in the
> serialized priority queue (via the {{PriorityQueueSerializer}}).
> In newer versions, the {{StreamElementSerializer}} is used instead. For this
> to work, we need to implement the compatibility methods for
> {{StreamElementSerializer}} such that it is also compatible with
> configuration snapshots taken from the {{MultiplexingStreamRecordSerializer}}.
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