zhijiangW commented on issue #9132: [FLINK-13245][network] Fix the bug of file resource leak while canceling partition request URL: https://github.com/apache/flink/pull/9132#issuecomment-513301073 @zentol , for the case of `SlotCountExceedingParallelismTest` it would not generate `ReleaseOnConsumptionResultPartition` because of blocking partition. Then the reference counter is not actually used for releasing partitions, but the partitions would finally be release via `RegionPartitionReleaseStrategy`. This PR change seems only make reference counter work for pipelined partitions. I run the `SlotCountExceedingParallelismTest` locally in Mac system, and it does not have file leaks before/after this fix. If in windows system it has file leaks then I guess it might be relevant with mmap mechanism in different systems. In addition, how do you test as mentioned above? Do you mean shutting down the cluster/job during test running? If the tests are not running finished, then it would indeed leftover `.channel` files.
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