[jira] [Created] (FLINK-8715) RocksDB does propagate reconfiguration of serializer to the states

[Arvid Heise (JIRA)]

Arvid Heise created FLINK-8715:
----------------------------------

             Summary: RocksDB does propagate reconfiguration of serializer to 
the states
                 Key: FLINK-8715
                 URL: https://issues.apache.org/jira/browse/FLINK-8715
             Project: Flink
          Issue Type: Bug
    Affects Versions: 1.3.2
            Reporter: Arvid Heise


Any changes to the serializer done in #ensureCompability are lost during the 
state creation.

In particular, 
[https://github.com/apache/flink/blob/2f7392d77d85823d3db1f1e5a8d4f6c94358d773/flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBValueState.java#L68]
 always uses a fresh copy of the StateDescriptor.

An easy fix is to pass the reconfigured serializer as an additional parameter 
in 
[https://github.com/apache/flink/blob/2f7392d77d85823d3db1f1e5a8d4f6c94358d773/flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBKeyedStateBackend.java#L1681]
 , which can be retrieved through the side-output of getColumnFamily

```
kvStateInformation.get(stateDesc.getName()).f1.getStateSerializer()
```

I encountered it in 1.3.2 but the code in the master seems unchanged (hence the 
pointer into master).



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)