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Posted to issues@flink.apache.org by "Francis (Jira)" <ji...@apache.org> on 2026/06/10 11:46:00 UTC

[jira] [Created] (FLINK-39900) Support configuring the number of threads used in ForStStateDataTransfer

Francis created FLINK-39900:
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             Summary: Support configuring the number of threads used in ForStStateDataTransfer
                 Key: FLINK-39900
                 URL: https://issues.apache.org/jira/browse/FLINK-39900
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / State Backends
            Reporter: Francis


Currently it is not possible to configure the thread pool used in the 
`ForStStateDataTransfer` class. This limits the amount of threads available when transferring or writing state using ForSt. Whenever a `ForStStateDataTransfer` class is created, the default `DEFAULT_THREAD_NUM` of 4 is passed in via the class constructor. 
 

When working with Flink applications that handle large amounts of state it would be helpful to tune this value. We should add a `ConfigOption` that allows configuring the amount of threads made available to the `ForStStateDataTransfer` class.



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