Has anyone seen this NullPointerException after enabling checkpoint file merging? I'm running a job with Flink 1.20.2 with these configs:
execution.checkpointing.file-merging.enabled: true execution.checkpointing.file-merging.max-file-size: 32m execution.checkpointing.timeout: "10min" execution.checkpointing.tolerable-failed-checkpoints: 3 execution.checkpointing.min-pause: "2min" execution.checkpointing.interval: "2min" java.lang.NullPointerException at org.apache.flink.runtime.checkpoint.filemerging.FileMergingSnapshotManagerBase.isManagedByFileMergingManager(FileMergingSnapshotManagerBase.java:927) at org.apache.flink.runtime.checkpoint.filemerging.FileMergingSnapshotManagerBase.lambda$restoreStateHandles$11(FileMergingSnapshotManagerBase.java:866) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1220) at org.apache.flink.runtime.checkpoint.filemerging.FileMergingSnapshotManagerBase.lambda$restoreStateHandles$12(FileMergingSnapshotManagerBase.java:861) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.ArrayList$Itr.forEachRemaining(ArrayList.java:1003) at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845) at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at org.apache.flink.runtime.checkpoint.filemerging.FileMergingSnapshotManagerBase.restoreStateHandles(FileMergingSnapshotManagerBase.java:858) at org.apache.flink.runtime.checkpoint.filemerging.SubtaskFileMergingManagerRestoreOperation.restore(SubtaskFileMergingManagerRestoreOperation.java:102) at org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.registerRestoredStateToFileMergingManager(StreamTaskStateInitializerImpl.java:353) at org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.streamOperatorStateContext(StreamTaskStateInitializerImpl.java:163) at org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:275) at org.apache.flink.streaming.runtime.tasks.RegularOperatorChain.initializeStateAndOpenOperators(RegularOperatorChain.java:106) at org.apache.flink.streaming.runtime.tasks.StreamTask.restoreStateAndGates(StreamTask.java:858) at org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$restoreInternal$5(StreamTask.java:812) at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.call(StreamTaskActionExecutor.java:55) at org.apache.flink.streaming.runtime.tasks.StreamTask.restoreInternal(StreamTask.java:812) at org.apache.flink.streaming.runtime.tasks.StreamTask.restore(StreamTask.java:771) at org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:970) at org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:939) at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:763) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:575) at java.base/java.lang.Thread.run(Thread.java:840)
