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https://issues.apache.org/jira/browse/FLINK-31560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17706835#comment-17706835
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Yanfei Lei commented on FLINK-31560:
------------------------------------
Although the checkpoint type of is no longer hardcoded in
[SourceOperatorStreamTask|[https://github.com/apache/flink/pull/19138/files#diff-c15a9905db161a6cc3ff209ec2f15628a2f105bc47fe109e35599fd13d6722dfL167]],
savepoint will still be transformed into checkpoint in some cases.
[~Leonard] [~renqs] Could you please help take a look?
> Savepoint failing to complete with incremental RocksDB statebackend
> -------------------------------------------------------------------
>
> Key: FLINK-31560
> URL: https://issues.apache.org/jira/browse/FLINK-31560
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing
> Affects Versions: 1.16.0
> Reporter: Fan Yang
> Priority: Major
> Attachments: image-2023-03-23-18-03-05-943.png,
> image-2023-03-23-18-19-24-482.png, jobmanager_log.txt,
> taskmanager_172.28.17.19_6123-f2dbff_log,
> tmp_tm_172.28.17.19_6123-f2dbff_tmp_job_83ad4f408d0e7bf30f940ddfa5fe00e3_op_WindowOperator_137df028a798f504a6900a4081c9990c__1_1__uuid_edc681f0-3825-45ce-a123-9ff69ce6d8f1_db_LOG
>
>
> Flink version: 1.16.0
>
> We are using Flink to run some streaming applications with Pravega as source
> and use window and reduce transformations. We use RocksDB state backend with
> incremental checkpointing enabled. We don't enable the latest changelog state
> backend.
> When we try to stop the job, we encounter issues with the savepoint failing
> to complete for the job. This happens most of the time. On rare occasions,
> the job gets canceled suddenly with its savepoint get completed successfully.
> Savepointing shows below error:
>
> {code:java}
> 2023-03-22 08:55:57,521 [jobmanager-io-thread-1] WARN
> org.apache.flink.runtime.checkpoint.CheckpointFailureManager [] - Failed to
> trigger or complete checkpoint 189 for job 7354442cd6f7c121249360680c04284d.
> (0 consecutive failed attempts so
> far)org.apache.flink.runtime.checkpoint.CheckpointException: Failure to
> finalize checkpoint. at
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.finalizeCheckpoint(CheckpointCoordinator.java:1375)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.completePendingCheckpoint(CheckpointCoordinator.java:1265)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.receiveAcknowledgeMessage(CheckpointCoordinator.java:1157)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.scheduler.ExecutionGraphHandler.lambda$acknowledgeCheckpoint$1(ExecutionGraphHandler.java:89)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.scheduler.ExecutionGraphHandler.lambda$processCheckpointCoordinatorMessage$3(ExecutionGraphHandler.java:119)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> [?:?] at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> [?:?] at java.lang.Thread.run(Thread.java:829) [?:?]
> Caused by: java.io.IOException: Unknown implementation of StreamStateHandle:
> class org.apache.flink.runtime.state.PlaceholderStreamStateHandle at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV2V3SerializerBase.serializeStreamStateHandle(MetadataV2V3SerializerBase.java:699)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV2V3SerializerBase.serializeStreamStateHandleMap(MetadataV2V3SerializerBase.java:813)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV2V3SerializerBase.serializeKeyedStateHandle(MetadataV2V3SerializerBase.java:344)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV2V3SerializerBase.serializeKeyedStateCol(MetadataV2V3SerializerBase.java:269)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV2V3SerializerBase.serializeSubtaskState(MetadataV2V3SerializerBase.java:262)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV3Serializer.serializeSubtaskState(MetadataV3Serializer.java:142)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV3Serializer.serializeOperatorState(MetadataV3Serializer.java:122)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV2V3SerializerBase.serializeMetadata(MetadataV2V3SerializerBase.java:146)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV3Serializer.serialize(MetadataV3Serializer.java:83)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.metadata.MetadataV4Serializer.serialize(MetadataV4Serializer.java:56)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.Checkpoints.storeCheckpointMetadata(Checkpoints.java:100)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.Checkpoints.storeCheckpointMetadata(Checkpoints.java:87)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.Checkpoints.storeCheckpointMetadata(Checkpoints.java:82)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.PendingCheckpoint.finalizeCheckpoint(PendingCheckpoint.java:333)
> ~[flink-dist-1.16.0.jar:1.16.0] at
> org.apache.flink.runtime.checkpoint.CheckpointCoordinator.finalizeCheckpoint(CheckpointCoordinator.java:1361)
> ~[flink-dist-1.16.0.jar:1.16.0] ... 7 more {code}
>
> Prior to Flink 1.16, we did not observe this error. Since
> `PlaceholderStreamStateHandle` is used to indicate it's a reusable RocksDB
> data for incremental checkpoint, we believe that the new improvements of
> incremental checkpoint introduced in flink 1.16 release might be related to
> this issue.
> We require assistance in investigating this issue and finding a solution.
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