Could you show us how you interact with the map state (ideally the full code of your function that accesses the state)?

On 3/25/2021 1:13 AM, Almeida, Julius wrote:

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 <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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