Zakelly commented on code in PR #24640: URL: https://github.com/apache/flink/pull/24640#discussion_r1574334314
########## flink-runtime/src/main/java/org/apache/flink/runtime/taskexecutor/TaskExecutor.java: ########## @@ -830,6 +832,8 @@ public CompletableFuture<Acknowledge> submitTask( channelStateExecutorFactoryManager.getOrCreateExecutorFactory(jobId)); taskMetricGroup.gauge(MetricNames.IS_BACK_PRESSURED, task::isBackPressured); + registerTaskRestoreInfoToFileMergingManager( + fileMergingSnapshotManager, task.getTaskInfo(), taskRestore); Review Comment: I suggest move this part into `StreamTaskStateInitializerImpl#streamOperatorStateContext`, where the state backends are performing restoration. ########## flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/filemerging/FileMergingSnapshotManagerBase.java: ########## @@ -575,8 +576,51 @@ private void createManagedDirectory(Path managedPath) { @Override public void close() throws IOException {} + // ------------------------------------------------------------------------ + // restore + // ------------------------------------------------------------------------ + + @Override + public void restoreStateHandles( + long checkpointId, SubtaskKey subtaskKey, Stream<SegmentFileStateHandle> stateHandles) { + + Set<LogicalFile> uploadedLogicalFiles; + synchronized (lock) { + uploadedLogicalFiles = + uploadedStates.computeIfAbsent(checkpointId, id -> new HashSet<>()); + } + + stateHandles.forEach( + fileHandle -> { + PhysicalFile physicalFile = + new PhysicalFile( + null, + fileHandle.getFilePath(), + physicalFileDeleter, Review Comment: So for now will this `FileMergingSnapshotManager` delete underlying files after rescaling? ########## flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/filemerging/FileMergingSnapshotManagerBase.java: ########## @@ -575,8 +576,51 @@ private void createManagedDirectory(Path managedPath) { @Override public void close() throws IOException {} + // ------------------------------------------------------------------------ + // restore + // ------------------------------------------------------------------------ + + @Override + public void restoreStateHandles( + long checkpointId, SubtaskKey subtaskKey, Stream<SegmentFileStateHandle> stateHandles) { + + Set<LogicalFile> uploadedLogicalFiles; + synchronized (lock) { + uploadedLogicalFiles = + uploadedStates.computeIfAbsent(checkpointId, id -> new HashSet<>()); + } + + stateHandles.forEach( + fileHandle -> { + PhysicalFile physicalFile = + new PhysicalFile( + null, + fileHandle.getFilePath(), + physicalFileDeleter, + fileHandle.getScope()); Review Comment: Should we have shared `PhysicalFile` instance for multiple `LogicalFile` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org