You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@flink.apache.org by "Yun Tang (Jira)" <ji...@apache.org> on 2021/04/20 07:20:00 UTC

[jira] [Created] (FLINK-22369) RocksDB state backend might occur ClassNotFoundException when deserializing on TM side

Yun Tang created FLINK-22369:
--------------------------------

             Summary: RocksDB state backend might occur ClassNotFoundException when deserializing on TM side
                 Key: FLINK-22369
                 URL: https://issues.apache.org/jira/browse/FLINK-22369
             Project: Flink
          Issue Type: Bug
    Affects Versions: 1.13.0
            Reporter: Yun Tang
             Fix For: 1.13.0
         Attachments: image-2021-04-20-15-18-49-706.png

FLINK-19467 introduced new {{EmbeddedRocksDBStateBackend}} and added new interface {{[EmbeddedRocksDBStateBackend#setLogger|https://github.com/apache/flink/blob/24031e55e4cf35a5818db2e927e65b290a9b2aed/flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/EmbeddedRocksDBStateBackend.java#L287]}} to ensures users of the legacy {{RocksDBStateBackend}} see consistent logging.

However, this change introduce another non transient {{[logger|https://github.com/apache/flink/blob/24031e55e4cf35a5818db2e927e65b290a9b2aed/flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/EmbeddedRocksDBStateBackend.java#L115]}} and it would be deserialized on TM side first. If the client has different log4j implementation, we might meet ClassNotFoundException:
 !image-2021-04-20-15-18-49-706.png! 



--
This message was sent by Atlassian Jira
(v8.3.4#803005)