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  1. Sub-task FLINK-33990
    Use default classloader in TaskManager when there are no user jars for job
  2. Sub-task FLINK-33792
    Generate the same code for the same logic
  3. Sub-task FLINK-33532
    Move the serialization of ShuffleDescriptorGroup out of the RPC main thread
  4. Sub-task FLINK-33266
    Support plan cache for DQL in SQL Gateway
  5. Sub-task FLINK-33054
    Align the job execution result fetching timeout in CollectResultFetcher with akka timeout
  6. Sub-task FLINK-32863
    Improve Flink UI's time precision from second level to millisecond level
  7. Sub-task FLINK-32764
    SlotManager supports pulling up all TaskManagers at initialization
  8. Sub-task FLINK-32762
    Support concurrency control when submitting OLAP jobs to Dispatcher
  9. Sub-task FLINK-32746
    Using ZGC in JDK17 to solve long time class unloading STW
  10. Sub-task FLINK-32299
    Upload python jar when sql contains python udf jar
  11. Sub-task FLINK-32265
    Use default classloader in jobmanager when there are no user jars for job
  12. Sub-task FLINK-32118
    Support customized listener during task manager startup
  13. Sub-task FLINK-29637
    Improve to reuse threads in TaskManager for different tasks between jobs
  14. Sub-task FLINK-29317
    Add WebSocket in Dispatcher to support olap query submission and push results in session cluster
  15. Sub-task FLINK-28691
    Improve cache hit rate of generated class
  16. Sub-task FLINK-26675
    Parallelized heavy serialization operations in StreamingJobGraphGenerator
  17. Sub-task FLINK-26641
    Optimize the time of fetching job status in the job submission of session cluster
  18. Sub-task FLINK-25794
    Memory pages in LazyMemorySegmentPool should be clear after they are released to MemoryManager
  19. Sub-task FLINK-25742
    Remove the redundant serialization of RPC invocation at Flink side.
  20. Sub-task FLINK-25741
    Ignore buffer pools which have no floating buffer in buffer redistributing
  21. Sub-task FLINK-25586
    ExecutionGraphInfoStore in session cluster should split failed and successful jobs
  22. Sub-task FLINK-25445
    TaskExecutor always creates local file for task even when local state store is not used
  23. Sub-task FLINK-25376
    Too many JM logs in flink session cluster for olap queries
  24. Sub-task FLINK-25372
    Add thread dump feature for jobmanager
  25. Sub-task FLINK-25338
    Improvement of connection from TM to JM in session cluster
  26. Sub-task FLINK-25335
    HiveSourceFileEnumerator should fetch splits asynchronously
  27. Sub-task FLINK-25334
    Manage and share gateways of taskmanagers between jobs in session cluster
  28. Sub-task FLINK-25329
    Improvement of execution graph store in flink session cluster for jobs
  29. Sub-task FLINK-25328
    Improvement of reuse segments for join/agg/sort operators in TaskManager for flink olap queries
  30. Sub-task FLINK-25055
    Support listen and notify mechanism for PartitionRequest
  31. Sub-task FLINK-25015
    job name should not always be `collect` submitted by sql client
  32. Sub-task FLINK-15959
    Add min number of slots configuration to limit total number of slots
  33. Sub-task FLINK-15455
    Enable TCP connection reuse across multiple jobs.
  34. Sub-task FLINK-15024
    System classloader memory leak after loading too many codegen classes.
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