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https://issues.apache.org/jira/browse/FLINK-4471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15434829#comment-15434829
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ASF GitHub Bot commented on FLINK-4471:
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Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/2413
It should be fixed by not loading the `StateDescriptor` anymore, yes. We
should maybe only merge it on the 1.1.* release branch because for 1.2 it will
be overwritten by our changes.
> Rocks backend fully async snapshot restore fails with custom serializers
> ------------------------------------------------------------------------
>
> Key: FLINK-4471
> URL: https://issues.apache.org/jira/browse/FLINK-4471
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing, Streaming
> Affects Versions: 1.1.0
> Reporter: Gyula Fora
> Assignee: Gyula Fora
> Priority: Critical
>
> The StateDescriptor is not deserialized with the usercode classloader. This
> makes restore fail with NoClassDefFound error if the user uses custom type
> serializers:
> https://github.com/apache/flink/blob/master/flink-contrib/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBStateBackend.java#L583
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