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https://issues.apache.org/jira/browse/FLINK-23886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18019324#comment-18019324
]
Feifan Wang commented on FLINK-23886:
-------------------------------------
Encountered a similar issue with deserializing user keys on Flink 1.12.2 again：
{code}
2025-09-10 06:19:45
org.apache.flink.util.FlinkRuntimeException: Error while deserializing the
element.
at
org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet.deserializeElement(RocksDBCachingPriorityQueueSet.java:387)
at
org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet.peek(RocksDBCachingPriorityQueueSet.java:144)
at
org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet.peek(RocksDBCachingPriorityQueueSet.java:57)
at
org.apache.flink.runtime.state.heap.KeyGroupPartitionedPriorityQueue.peek(KeyGroupPartitionedPriorityQueue.java:109)
at
org.apache.flink.streaming.api.operators.InternalTimerServiceImpl.startTimerService(InternalTimerServiceImpl.java:188)
at
org.apache.flink.streaming.api.operators.InternalTimeServiceManagerImpl.getInternalTimerService(InternalTimeServiceManagerImpl.java:152)
at
org.apache.flink.streaming.api.operators.AbstractStreamOperator.getInternalTimerService(AbstractStreamOperator.java:620)
at
org.apache.flink.streaming.runtime.operators.windowing.WindowOperator.open(WindowOperator.java:225)
at
org.apache.flink.streaming.runtime.tasks.OperatorChain.initializeStateAndOpenOperators(OperatorChain.java:478)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$beforeInvoke$2(StreamTask.java:547)
at
org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:50)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:537)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:577)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:784)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:595)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.EOFException
at
org.apache.flink.core.memory.DataInputDeserializer.readUnsignedByte(DataInputDeserializer.java:329)
at org.apache.flink.types.StringValue.readString(StringValue.java:786)
at
org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:73)
at
org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:31)
at
org.apache.flink.streaming.api.operators.TimerSerializer.deserialize(TimerSerializer.java:161)
at
org.apache.flink.streaming.api.operators.TimerSerializer.deserialize(TimerSerializer.java:43)
at
org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet.deserializeElement(RocksDBCachingPriorityQueueSet.java:385)
... 15 more{code}
> An exception is thrown out when recover job timers from checkpoint file
> -----------------------------------------------------------------------
>
> Key: FLINK-23886
> URL: https://issues.apache.org/jira/browse/FLINK-23886
> Project: Flink
> Issue Type: Bug
> Components: Runtime / State Backends
> Affects Versions: 1.10.0, 1.11.3, 1.12.2, 1.13.2, 1.13.5, 1.14.4
> Reporter: Jing Zhang
> Assignee: Yuan Mei
> Priority: Major
> Attachments: image-2021-08-25-16-38-04-023.png,
> image-2021-08-25-16-38-12-308.png, image-2021-08-25-17-06-29-806.png,
> image-2021-08-25-17-07-38-327.png, image-2024-07-08-16-55-53-243.png,
> segment-drop-corrupted-timer-state.diff
>
>
> A user report the bug in the [mailist.
> |http://mail-archives.apache.org/mod_mbox/flink-user/202108.mbox/%3ccakmsf43j14nkjmgjuy4dh5qn2vbjtw4tfh4pmmuyvcvfhgf...@mail.gmail.com%3E]I
> paste the content here.
> Setup Specifics:
> Version: 1.6.2
> RocksDB Map State
> Timers stored in rocksdb
>
> When we have this job running for long periods of time like > 30 days, if
> for some reason the job restarts, we encounter "Error while deserializing the
> element". Is this a known issue fixed in later versions? I see some changes
> to code for FLINK-10175, but we don't use any queryable state
>
> Below is the stack trace
>
> org.apache.flink.util.FlinkRuntimeException: Error while deserializing the
> element.
> at
> org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet.deserializeElement(RocksDBCachingPriorityQueueSet.java:389)
> at
> org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet.peek(RocksDBCachingPriorityQueueSet.java:146)
> at
> org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet.peek(RocksDBCachingPriorityQueueSet.java:56)
> at
> org.apache.flink.runtime.state.heap.KeyGroupPartitionedPriorityQueue$InternalPriorityQueueComparator.comparePriority(KeyGroupPartitionedPriorityQueue.java:274)
> at
> org.apache.flink.runtime.state.heap.KeyGroupPartitionedPriorityQueue$InternalPriorityQueueComparator.comparePriority(KeyGroupPartitionedPriorityQueue.java:261)
> at
> org.apache.flink.runtime.state.heap.HeapPriorityQueue.isElementPriorityLessThen(HeapPriorityQueue.java:164)
> at
> org.apache.flink.runtime.state.heap.HeapPriorityQueue.siftUp(HeapPriorityQueue.java:121)
> at
> org.apache.flink.runtime.state.heap.HeapPriorityQueue.addInternal(HeapPriorityQueue.java:85)
> at
> org.apache.flink.runtime.state.heap.AbstractHeapPriorityQueue.add(AbstractHeapPriorityQueue.java:73)
> at
> org.apache.flink.runtime.state.heap.KeyGroupPartitionedPriorityQueue.<init>(KeyGroupPartitionedPriorityQueue.java:89)
> at
> org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend$RocksDBPriorityQueueSetFactory.create(RocksDBKeyedStateBackend.java:2792)
> at
> org.apache.flink.contrib.streaming.state.RocksDBKeyedStateBackend.create(RocksDBKeyedStateBackend.java:450)
> at
> org.apache.flink.streaming.api.operators.InternalTimeServiceManager.createTimerPriorityQueue(InternalTimeServiceManager.java:121)
> at
> org.apache.flink.streaming.api.operators.InternalTimeServiceManager.registerOrGetTimerService(InternalTimeServiceManager.java:106)
> at
> org.apache.flink.streaming.api.operators.InternalTimeServiceManager.getInternalTimerService(InternalTimeServiceManager.java:87)
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.getInternalTimerService(AbstractStreamOperator.java:764)
> at
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.open(KeyedProcessOperator.java:61)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.openAllOperators(StreamTask.java:424)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:290)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.io.EOFException
> at java.io.DataInputStream.readUnsignedByte(DataInputStream.java:290)
> at org.apache.flink.types.StringValue.readString(StringValue.java:769)
> at
> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:69)
> at
> org.apache.flink.api.common.typeutils.base.StringSerializer.deserialize(StringSerializer.java:28)
> at
> org.apache.flink.api.java.typeutils.runtime.RowSerializer.deserialize(RowSerializer.java:179)
> at
> org.apache.flink.api.java.typeutils.runtime.RowSerializer.deserialize(RowSerializer.java:46)
> at
> org.apache.flink.streaming.api.operators.TimerSerializer.deserialize(TimerSerializer.java:168)
> at
> org.apache.flink.streaming.api.operators.TimerSerializer.deserialize(TimerSerializer.java:45)
> at
> org.apache.flink.contrib.streaming.state.RocksDBCachingPriorityQueueSet.deserializeElement(RocksDBCachingPriorityQueueSet.java:387)
> ... 20 more
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