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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2016/02/22 10:49:18 UTC
[jira] [Commented] (FLINK-3450) RocksDB Backed Window Fails with
KryoSerializer
[ https://issues.apache.org/jira/browse/FLINK-3450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15156696#comment-15156696 ]
ASF GitHub Bot commented on FLINK-3450:
---------------------------------------
GitHub user aljoscha opened a pull request:
https://github.com/apache/flink/pull/1686
[FLINK-3450] Duplicate TypeSerializer in StateDescriptor.writeObject
The StateDescriptor can be serializer asynchronously in case of
asynchronous checkpoints. In that case two threads would try to
concurrently use the TypeSerializer: The normal state updating and the
checkpoint serialization. If the TypeSerializer is a KryoSerializer this
can lead to problems. Therefore the need to duplicate it before using in
"writeObject".
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aljoscha/flink state-descriptor-kryo-fix
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/1686.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 #1686
----
commit 51d8dc9fa5cdd84b6cc1c7711af96ddabf12aaf6
Author: Aljoscha Krettek <al...@gmail.com>
Date: 2016-02-19T14:38:57Z
[FLINK-3450] Duplicate TypeSerializer in StateDescriptor.writeObject
The StateDescriptor can be serializer asynchronously in case of
asynchronous checkpoints. In that case two threads would try to
concurrently use the TypeSerializer: The normal state updating and the
checkpoint serialization. If the TypeSerializer is a KryoSerializer this
can lead to problems. Therefore the need to duplicate it before using in
"writeObject".
----
> RocksDB Backed Window Fails with KryoSerializer
> -----------------------------------------------
>
> Key: FLINK-3450
> URL: https://issues.apache.org/jira/browse/FLINK-3450
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 1.0.0
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Priority: Blocker
> Fix For: 1.0.0
>
>
> It fails due to concurrent use of the KryoSerializer when asynchronously serializing the {{StateDescriptor}} during checkpointing.
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