[ 
https://issues.apache.org/jira/browse/FLINK-38403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18023062#comment-18023062
 ] 

Zakelly Lan edited comment on FLINK-38403 at 9/26/25 9:56 AM:
--------------------------------------------------------------

In 
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=69874&view=logs&j=5c8e7682-d68f-54d1-16a2-a09310218a49&t=9d734c8c-6253-55e6-3bce-47e7cdf68ac4
I found:

{code:java}
04:59:42,896 [  Sink: sink (5/5)#2] ERROR 
org.apache.flink.runtime.taskexecutor.TaskExecutor           [] - FATAL - 
exception in exception handler of task Sink: sink (5/5)#2 
(89aa0a66a44252eb4c9b9811686b3bd5_2e588ce1c86a9d46e2e85186773ce4fd_4_2).
java.lang.RuntimeException: 
org.apache.flink.runtime.io.network.netty.exception.RemoteTransportException: 
Error at remote task manager 'localhost/127.0.0.1:45253 [ 
b9be95dc-38ff-46cf-9706-33c27a822bb0 ] '.
        at 
org.apache.flink.util.ExceptionUtils.rethrow(ExceptionUtils.java:321) 
~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.partition.consumer.BufferManager.recycle(BufferManager.java:237)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.buffer.NetworkBuffer.deallocate(NetworkBuffer.java:189)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractReferenceCountedByteBuf.handleRelease(AbstractReferenceCountedByteBuf.java:111)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractReferenceCountedByteBuf.release(AbstractReferenceCountedByteBuf.java:101)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.runtime.io.network.buffer.NetworkBuffer.recycleBuffer(NetworkBuffer.java:161)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.clear(SpillingAdaptiveSpanningRecordDeserializer.java:140)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.releaseDeserializer(AbstractStreamTaskNetworkInput.java:328)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.close(AbstractStreamTaskNetworkInput.java:320)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.close(StreamTaskNetworkInput.java:142)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.close(StreamOneInputProcessor.java:88)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInternal(StreamTask.java:1110)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.util.IOUtils.closeAll(IOUtils.java:257) 
~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.core.fs.AutoCloseableRegistry.doClose(AutoCloseableRegistry.java:83)
 ~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.util.AbstractAutoCloseableRegistry.close(AbstractAutoCloseableRegistry.java:127)
 ~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUp(StreamTask.java:1101)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.lambda$restoreAndInvoke$2(Task.java:958)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:973)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.lambda$restoreAndInvoke$3(Task.java:958)
 [flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.util.IOUtils.closeAll(IOUtils.java:257) 
~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.core.fs.AutoCloseableRegistry.doClose(AutoCloseableRegistry.java:83)
 ~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.util.AbstractAutoCloseableRegistry.close(AbstractAutoCloseableRegistry.java:127)
 ~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:794) 
[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.runtime.taskmanager.Task.run(Task.java:569) 
[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at java.base/java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: 
org.apache.flink.runtime.io.network.netty.exception.RemoteTransportException: 
Error at remote task manager 'localhost/127.0.0.1:45253 [ 
b9be95dc-38ff-46cf-9706-33c27a822bb0 ] '.
        at 
org.apache.flink.runtime.io.network.netty.CreditBasedPartitionRequestClientHandler.decodeMsg(CreditBasedPartitionRequestClientHandler.java:333)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.CreditBasedPartitionRequestClientHandler.channelRead(CreditBasedPartitionRequestClientHandler.java:197)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.runtime.io.network.netty.NettyMessageClientDecoderDelegate.channelRead(NettyMessageClientDecoderDelegate.java:112)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:509)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:407)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        ... 1 more
Caused by: 
org.apache.flink.runtime.io.network.partition.ProducerFailedException: 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$TestException: 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$TestException: 
Failing map @ 7 (2 attempt); last value 48914
        at 
org.apache.flink.runtime.io.network.partition.PipelinedSubpartitionView.getFailureCause(PipelinedSubpartitionView.java:96)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.CreditBasedSequenceNumberingViewReader.getFailureCause(CreditBasedSequenceNumberingViewReader.java:282)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.writeAndFlushNextMessageIfPossible(PartitionRequestQueue.java:325)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.enqueueAvailableReader(PartitionRequestQueue.java:126)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.userEventTriggered(PartitionRequestQueue.java:254)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:400)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireUserEventTriggered(AbstractChannelHandlerContext.java:368)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter.userEventTriggered(ChannelInboundHandlerAdapter.java:117)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.userEventTriggered(ByteToMessageDecoder.java:387)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:400)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireUserEventTriggered(AbstractChannelHandlerContext.java:368)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline$HeadContext.userEventTriggered(DefaultChannelPipeline.java:1428)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:396)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline.fireUserEventTriggered(DefaultChannelPipeline.java:913)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.lambda$notifyReaderNonEmpty$0(PartitionRequestQueue.java:94)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:413)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        ... 1 more
Caused by: org.apache.flink.util.SerializedThrowable: 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$TestException: 
Failing map @ 7 (2 attempt); last value 48914
        at 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$FailingMapper.failMapper(UnalignedCheckpointTestBase.java:875)
 ~[test-classes/:?]
        at 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$FailingMapper.checkFail(UnalignedCheckpointTestBase.java:870)
 ~[test-classes/:?]
        at 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$FailingMapper.map(UnalignedCheckpointTestBase.java:863)
 ~[test-classes/:?]
        at 
org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:37)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:247)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.processElement(AbstractStreamTaskNetworkInput.java:206)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:163)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:646)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:231)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:988)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:925) 
~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:973)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:955) 
~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:760) 
~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        ... 2 more
{code}

It seems that the artificial error caused the TM exit? 



was (Author: zakelly):
In 
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=69874&view=logs&j=5c8e7682-d68f-54d1-16a2-a09310218a49&t=9d734c8c-6253-55e6-3bce-47e7cdf68ac4
I found:

{code:java}
ERROR org.apache.flink.runtime.minicluster.MiniCluster             [] - 
TaskManager #0 failed.
java.lang.RuntimeException: 
org.apache.flink.runtime.io.network.netty.exception.RemoteTransportException: 
Error at remote task manager 'localhost/127.0.0.1:45253 [ 
b9be95dc-38ff-46cf-9706-33c27a822bb0 ] '.
        at 
org.apache.flink.util.ExceptionUtils.rethrow(ExceptionUtils.java:321) 
~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.partition.consumer.BufferManager.recycle(BufferManager.java:237)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.buffer.NetworkBuffer.deallocate(NetworkBuffer.java:189)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractReferenceCountedByteBuf.handleRelease(AbstractReferenceCountedByteBuf.java:111)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractReferenceCountedByteBuf.release(AbstractReferenceCountedByteBuf.java:101)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.runtime.io.network.buffer.NetworkBuffer.recycleBuffer(NetworkBuffer.java:161)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.clear(SpillingAdaptiveSpanningRecordDeserializer.java:140)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.releaseDeserializer(AbstractStreamTaskNetworkInput.java:328)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.close(AbstractStreamTaskNetworkInput.java:320)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.close(StreamTaskNetworkInput.java:142)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.close(StreamOneInputProcessor.java:88)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInternal(StreamTask.java:1110)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.util.IOUtils.closeAll(IOUtils.java:257) 
~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.core.fs.AutoCloseableRegistry.doClose(AutoCloseableRegistry.java:83)
 ~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.util.AbstractAutoCloseableRegistry.close(AbstractAutoCloseableRegistry.java:127)
 ~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUp(StreamTask.java:1101)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.lambda$restoreAndInvoke$2(Task.java:958)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:973)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.lambda$restoreAndInvoke$3(Task.java:958)
 [flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.util.IOUtils.closeAll(IOUtils.java:257) 
~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.core.fs.AutoCloseableRegistry.doClose(AutoCloseableRegistry.java:83)
 ~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.util.AbstractAutoCloseableRegistry.close(AbstractAutoCloseableRegistry.java:127)
 ~[flink-core-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:794) 
[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.runtime.taskmanager.Task.run(Task.java:569) 
[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at java.base/java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: 
org.apache.flink.runtime.io.network.netty.exception.RemoteTransportException: 
Error at remote task manager 'localhost/127.0.0.1:45253 [ 
b9be95dc-38ff-46cf-9706-33c27a822bb0 ] '.
        at 
org.apache.flink.runtime.io.network.netty.CreditBasedPartitionRequestClientHandler.decodeMsg(CreditBasedPartitionRequestClientHandler.java:333)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.CreditBasedPartitionRequestClientHandler.channelRead(CreditBasedPartitionRequestClientHandler.java:197)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.runtime.io.network.netty.NettyMessageClientDecoderDelegate.channelRead(NettyMessageClientDecoderDelegate.java:112)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:509)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:407)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        ... 1 more
Caused by: 
org.apache.flink.runtime.io.network.partition.ProducerFailedException: 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$TestException: 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$TestException: 
Failing map @ 7 (2 attempt); last value 48914
        at 
org.apache.flink.runtime.io.network.partition.PipelinedSubpartitionView.getFailureCause(PipelinedSubpartitionView.java:96)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.CreditBasedSequenceNumberingViewReader.getFailureCause(CreditBasedSequenceNumberingViewReader.java:282)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.writeAndFlushNextMessageIfPossible(PartitionRequestQueue.java:325)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.enqueueAvailableReader(PartitionRequestQueue.java:126)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.userEventTriggered(PartitionRequestQueue.java:254)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:400)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireUserEventTriggered(AbstractChannelHandlerContext.java:368)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter.userEventTriggered(ChannelInboundHandlerAdapter.java:117)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.userEventTriggered(ByteToMessageDecoder.java:387)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:400)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireUserEventTriggered(AbstractChannelHandlerContext.java:368)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline$HeadContext.userEventTriggered(DefaultChannelPipeline.java:1428)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:396)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeUserEventTriggered(AbstractChannelHandlerContext.java:376)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline.fireUserEventTriggered(DefaultChannelPipeline.java:913)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.lambda$notifyReaderNonEmpty$0(PartitionRequestQueue.java:94)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:413)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        at 
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
 ~[flink-shaded-netty-4.1.100.Final-20.0.jar:?]
        ... 1 more
Caused by: org.apache.flink.util.SerializedThrowable: 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$TestException: 
Failing map @ 7 (2 attempt); last value 48914
        at 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$FailingMapper.failMapper(UnalignedCheckpointTestBase.java:875)
 ~[test-classes/:?]
        at 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$FailingMapper.checkFail(UnalignedCheckpointTestBase.java:870)
 ~[test-classes/:?]
        at 
org.apache.flink.test.checkpointing.UnalignedCheckpointTestBase$FailingMapper.map(UnalignedCheckpointTestBase.java:863)
 ~[test-classes/:?]
        at 
org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:37)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:247)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.processElement(AbstractStreamTaskNetworkInput.java:206)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:163)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:646)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:231)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:988)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:925) 
~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:973)
 ~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at 
org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:955) 
~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:760) 
~[flink-runtime-2.2-SNAPSHOT.jar:2.2-SNAPSHOT]
        ... 2 more
{code}

It seems that the artificial error caused the TM exit? 


> UnalignedCheckpointITCase failed in test_cron_hadoop313 tests
> -------------------------------------------------------------
>
>                 Key: FLINK-38403
>                 URL: https://issues.apache.org/jira/browse/FLINK-38403
>             Project: Flink
>          Issue Type: Bug
>          Components: Tests
>    Affects Versions: 2.2.0
>            Reporter: Ruan Hang
>            Priority: Major
>
> Details:
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=69810&view=logs&j=baf26b34-3c6a-54e8-f93f-cf269b32f802&t=b380e762-00fc-5c06-e76c-b8e53634ca34



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