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Posted to dev@kafka.apache.org by "Kevin Chen (JIRA)" <ji...@apache.org> on 2017/06/06 14:47:18 UTC

[jira] [Created] (KAFKA-5393) in-memory state store memory issue

Kevin Chen created KAFKA-5393:
---------------------------------

             Summary: in-memory state store memory issue 
                 Key: KAFKA-5393
                 URL: https://issues.apache.org/jira/browse/KAFKA-5393
             Project: Kafka
          Issue Type: Bug
          Components: streams
    Affects Versions: 0.10.2.1
            Reporter: Kevin Chen
         Attachments: Screen Shot 2017-06-06 at 9.45.42 AM.png

We are running 2 kafka stream instance that use low level Processor API, and we are using in-memory state store.

When we upgrade  instance A, which will move all the tasks to instance B, and re-balance between the 2 after A is back up and running. 

But the problem is that, even after the re-balance, the memory in instance A did not drop to the previous level(the load is about the same).

see the screen shot below.



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