1996fanrui commented on code in PR #24653:
URL: https://github.com/apache/flink/pull/24653#discussion_r1594880568
##########
flink-runtime/src/main/java/org/apache/flink/runtime/state/filesystem/FsCheckpointStorageAccess.java:
##########
@@ -232,7 +232,9 @@ public FsMergingCheckpointStorageAccess
toFileMergingStorage(
FileMergingSnapshotManager mergingSnapshotManager, Environment
environment)
throws IOException {
return new FsMergingCheckpointStorageAccess(
- fileSystem,
+ /* Multiple subtask/threads would share one output stream,
+ SafetyNetWrapperFileSystem cannot be used to prevent different
threads from interfering with each other when exiting. */
+
FileSystem.getUnguardedFileSystem(checkpointsDirectory.toUri()),
Review Comment:
Also, I have a concern here: When we use `GuardedFileSystem`, all streams
can be closed properly when the corresponding thread is exiting. After this
change, if we use `UnguardedFileSystem`, it may cause stream leak.
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