Hey,
Hope you all are doing well!

I am using flink v1.9 with RocksDBStateBackend, but over time the state size is 
increasing exponentially.

I am using MapState in my project & seeing memory spike, after looking at heap 
dump I see duplicates in it.

I also have logic added to remove expired events form the MapState
Eg.: MapState.remove(key)

Can anyone give me pointers to find more details on it.

Heap Dump pointed to 
https://github.com/apache/flink/blob/master/flink-runtime/src/main/java/org/apache/flink/runtime/state/heap/CopyOnWriteStateMap.java#L811

Thanks,
Julius

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