[jira] [Created] (FLINK-14378) Cleanup rocksDB lib folder if fail to load library

[Shang Yuanchun (Jira)]

Yun Tang created FLINK-14378:
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             Summary: Cleanup rocksDB lib folder if fail to load library
                 Key: FLINK-14378
                 URL: https://issues.apache.org/jira/browse/FLINK-14378
             Project: Flink
          Issue Type: Improvement
            Reporter: Yun Tang


This improvement is inspired due to some of our machines need some time to load the rocksDB library. When some other unrecoverable exceptions continue to happen and the process to load library would be interrupted which cause the {{rocksdb-lib}} folder created but not cleaned up. As the job continues to failover, the {{rocksdb-lib}} folder would be created more and more. We even come across that machine was running out of inodes!

Details could refer to current [implementation|https://github.com/apache/flink/blob/80b27a150026b7b5cb707bd9fa3e17f565bb8112/flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBStateBackend.java#L860]



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