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flink savepoint问题

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xiayongquan

flink savepoint问题

Hi，您好，在使用flink的过程中遇到如下问题，个人未能解决，所以请求您指导一下，谢谢！

1. flink cancel -s $SAVEPOINT_DIR $job_id -yid $application_id 在程序有背压的时候停不掉

The program finished with the following exception:
org.apache.flink.util.FlinkException: Could not cancel job 1f768e4ca9ad5792a4844a5d12163b73.
at org.apache.flink.client.cli.CliFrontend.lambda$cancel$6(CliFrontend.java:523)
at org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:843)
at org.apache.flink.client.cli.CliFrontend.cancel(CliFrontend.java:515)
at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:904)
at org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:968)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1692)
at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:968)
Caused by: java.util.concurrent.TimeoutException
at java.util.concurrent.CompletableFuture.timedGet(CompletableFuture.java:1771)
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915)
at org.apache.flink.client.cli.CliFrontend.lambda$cancel$6(CliFrontend.java:521)
... 9 more
stop flink job failed!!!

2.再用flink sql的ddl时候增加一个字段后，程序启动失败，需要删除savepoint才能启动(ddl后双流join的逻辑，其中一个流加了一个字段)

The program finished with the following exception:
org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not complete the operation. Number of retries has been exhausted.
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:335)
at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:205)
at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:138)
at org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:664)
at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:213)
at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:895)
at org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:968)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1692)
at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:968)
Caused by: java.util.concurrent.ExecutionException: org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not complete the operation. Number of retries has been exhausted.
at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
at org.apache.flink.streaming.api.environment.StreamContextEnvironment.execute(StreamContextEnvironment.java:83)
at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1620)
at com.etl.DwdBaseCarlifeTIotBindGeoManage.main(DwdBaseCarlifeTIotBindGeoManage.java:265)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:321)
... 11 more
Caused by: org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not complete the operation. Number of retries has been exhausted.
at org.apache.flink.runtime.concurrent.FutureUtils.lambda$retryOperationWithDelay$8(FutureUtils.java:284)
at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760)
at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736)
at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
at java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
at org.apache.flink.runtime.rest.RestClient.lambda$submitRequest$1(RestClient.java:342)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:500)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:493)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:472)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:413)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:538)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:531)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:111)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:323)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:339)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
at org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.util.concurrent.CompletionException: org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused:/10.*.*.*:42666
at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:943)
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
... 19 more
Caused by: org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused:centos/10.*.*:42666
Caused by: java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:336)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
at org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
at org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.lang.Thread.run(Thread.java:748)

3.flink checkpoint超时问题，我之前的checkpoint间隔是3分钟，超时时间是5分钟，报了如下错误，而且job与taskmanager都不挂，很难监控。
现在checkpoint间隔调整成2分钟，超时时间是10分钟，不知是否会解决。
Checkpoint 298 of job 1f768e4ca9ad5792a4844a5d12163b73 expired before completing.

Congxian Qiu

Re: flink savepoint问题

Hi

对于问题 1 在反压的情况下，可能导致 Savepoint 做不成功从而超时，这个暂时没法解决，现在有一个 issue[1] 在做 Unalign
Checkpoint 可以解决反压情况下的 checkpoint
对于问题 3，checkpoint 超时了，超时的定义：在设置的时间内（比如你这里 5 分钟），有 task 没有完成
snapshot。调长超时时间能够一定的缓解这个问题，不过你最好找到超时的原因，然后针对性的优化。
[1] https://issues.apache.org/jira/browse/FLINK-14551
Best,
Congxian

大数据开发面试_夏永权 <[hidden email]> 于2020年3月27日周五下午4:19写道：

> Hi，您好，在使用flink的过程中遇到如下问题，个人未能解决，所以请求您指导一下，谢谢！
>
> 1. flink cancel -s $SAVEPOINT_DIR $job_id -yid $application_id
> 在程序有背压的时候停不掉
>
>
> The program finished with the following exception:
> org.apache.flink.util.FlinkException: Could not cancel job
> 1f768e4ca9ad5792a4844a5d12163b73.
> at
> org.apache.flink.client.cli.CliFrontend.lambda$cancel$6(CliFrontend.java:523)
> at
> org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:843)
> at org.apache.flink.client.cli.CliFrontend.cancel(CliFrontend.java:515)
> at
> org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:904)
> at
> org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:968)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1692)
> at
> org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
> at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:968)
> Caused by: java.util.concurrent.TimeoutException
> at
> java.util.concurrent.CompletableFuture.timedGet(CompletableFuture.java:1771)
> at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915)
> at
> org.apache.flink.client.cli.CliFrontend.lambda$cancel$6(CliFrontend.java:521)
> ... 9 more
> stop flink job failed!!!
>
>
>
>
> 2.再用flink
> sql的ddl时候增加一个字段后，程序启动失败，需要删除savepoint才能启动(ddl后双流join的逻辑，其中一个流加了一个字段)
>
>
> The program finished with the following exception:
> org.apache.flink.client.program.ProgramInvocationException: The main
> method caused an error:
> org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not
> complete the operation. Number of retries has been exhausted.
> at
> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:335)
> at
> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:205)
> at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:138)
> at
> org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:664)
> at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:213)
> at
> org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:895)
> at
> org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:968)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1692)
> at
> org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
> at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:968)
> Caused by: java.util.concurrent.ExecutionException:
> org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not
> complete the operation. Number of retries has been exhausted.
> at
> java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
> at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
> at
> org.apache.flink.streaming.api.environment.StreamContextEnvironment.execute(StreamContextEnvironment.java:83)
> at
> org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1620)
> at
> com.etl.DwdBaseCarlifeTIotBindGeoManage.main(DwdBaseCarlifeTIotBindGeoManage.java:265)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:321)
> ... 11 more
> Caused by: org.apache.flink.runtime.concurrent.FutureUtils$RetryException:
> Could not complete the operation. Number of retries has been exhausted.
> at
> org.apache.flink.runtime.concurrent.FutureUtils.lambda$retryOperationWithDelay$8(FutureUtils.java:284)
> at
> java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760)
> at
> java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736)
> at
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
> at
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
> at
> org.apache.flink.runtime.rest.RestClient.lambda$submitRequest$1(RestClient.java:342)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:500)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:493)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:472)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:413)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:538)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:531)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:111)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:323)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:339)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
> at
> org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.util.concurrent.CompletionException:
> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException:
> Connection refused:/10.*.*.*:42666
> at
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
> at
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
> at
> java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:943)
> at
> java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
> ... 19 more
> Caused by:
> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException:
> Connection refused:centos/10.*.*:42666
> Caused by: java.net.ConnectException: Connection refused
> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:336)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
> at
> org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> at java.lang.Thread.run(Thread.java:748)
>
>
>
>
> 3.flink
> checkpoint超时问题，我之前的checkpoint间隔是3分钟，超时时间是5分钟，报了如下错误，而且job与taskmanager都不挂，很难监控。
> 现在checkpoint间隔调整成2分钟，超时时间是10分钟，不知是否会解决。
> Checkpoint 298 of job 1f768e4ca9ad5792a4844a5d12163b73 expired before
> completing.

xiayongquan

Re:Re: flink savepoint问题

非常感谢
在 2020-03-28 11:04:09，"Congxian Qiu" <[hidden email]> 写道：

>Hi
>
>对于问题 1 在反压的情况下，可能导致 Savepoint 做不成功从而超时，这个暂时没法解决，现在有一个 issue[1] 在做 Unalign
>Checkpoint 可以解决反压情况下的 checkpoint
>对于问题 3，checkpoint 超时了，超时的定义：在设置的时间内（比如你这里 5 分钟），有 task 没有完成
>snapshot。调长超时时间能够一定的缓解这个问题，不过你最好找到超时的原因，然后针对性的优化。
>[1] https://issues.apache.org/jira/browse/FLINK-14551
>Best,
>Congxian
>
>
>大数据开发面试_夏永权 <[hidden email]> 于2020年3月27日周五下午4:19写道：
>
>> Hi，您好，在使用flink的过程中遇到如下问题，个人未能解决，所以请求您指导一下，谢谢！
>>
>> 1. flink cancel -s $SAVEPOINT_DIR $job_id -yid $application_id
>> 在程序有背压的时候停不掉
>>
>>
>> The program finished with the following exception:
>> org.apache.flink.util.FlinkException: Could not cancel job
>> 1f768e4ca9ad5792a4844a5d12163b73.
>> at
>> org.apache.flink.client.cli.CliFrontend.lambda$cancel$6(CliFrontend.java:523)
>> at
>> org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:843)
>> at org.apache.flink.client.cli.CliFrontend.cancel(CliFrontend.java:515)
>> at
>> org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:904)
>> at
>> org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:968)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at javax.security.auth.Subject.doAs(Subject.java:422)
>> at
>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1692)
>> at
>> org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
>> at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:968)
>> Caused by: java.util.concurrent.TimeoutException
>> at
>> java.util.concurrent.CompletableFuture.timedGet(CompletableFuture.java:1771)
>> at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915)
>> at
>> org.apache.flink.client.cli.CliFrontend.lambda$cancel$6(CliFrontend.java:521)
>> ... 9 more
>> stop flink job failed!!!
>>
>>
>>
>>
>> 2.再用flink
>> sql的ddl时候增加一个字段后，程序启动失败，需要删除savepoint才能启动(ddl后双流join的逻辑，其中一个流加了一个字段)
>>
>>
>> The program finished with the following exception:
>> org.apache.flink.client.program.ProgramInvocationException: The main
>> method caused an error:
>> org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not
>> complete the operation. Number of retries has been exhausted.
>> at
>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:335)
>> at
>> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:205)
>> at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:138)
>> at
>> org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:664)
>> at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:213)
>> at
>> org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:895)
>> at
>> org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:968)
>> at java.security.AccessController.doPrivileged(Native Method)
>> at javax.security.auth.Subject.doAs(Subject.java:422)
>> at
>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1692)
>> at
>> org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
>> at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:968)
>> Caused by: java.util.concurrent.ExecutionException:
>> org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not
>> complete the operation. Number of retries has been exhausted.
>> at
>> java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
>> at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
>> at
>> org.apache.flink.streaming.api.environment.StreamContextEnvironment.execute(StreamContextEnvironment.java:83)
>> at
>> org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1620)
>> at
>> com.etl.DwdBaseCarlifeTIotBindGeoManage.main(DwdBaseCarlifeTIotBindGeoManage.java:265)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:498)
>> at
>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:321)
>> ... 11 more
>> Caused by: org.apache.flink.runtime.concurrent.FutureUtils$RetryException:
>> Could not complete the operation. Number of retries has been exhausted.
>> at
>> org.apache.flink.runtime.concurrent.FutureUtils.lambda$retryOperationWithDelay$8(FutureUtils.java:284)
>> at
>> java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760)
>> at
>> java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736)
>> at
>> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>> at
>> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>> at
>> org.apache.flink.runtime.rest.RestClient.lambda$submitRequest$1(RestClient.java:342)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:500)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:493)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:472)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:413)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:538)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:531)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:111)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:323)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:339)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
>> at java.lang.Thread.run(Thread.java:748)
>> Caused by: java.util.concurrent.CompletionException:
>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException:
>> Connection refused:/10.*.*.*:42666
>> at
>> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
>> at
>> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
>> at
>> java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:943)
>> at
>> java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
>> ... 19 more
>> Caused by:
>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException:
>> Connection refused:centos/10.*.*:42666
>> Caused by: java.net.ConnectException: Connection refused
>> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>> at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:336)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
>> at
>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
>> at
>> org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
>> at java.lang.Thread.run(Thread.java:748)
>>
>>
>>
>>
>> 3.flink
>> checkpoint超时问题，我之前的checkpoint间隔是3分钟，超时时间是5分钟，报了如下错误，而且job与taskmanager都不挂，很难监控。
>> 现在checkpoint间隔调整成2分钟，超时时间是10分钟，不知是否会解决。
>> Checkpoint 298 of job 1f768e4ca9ad5792a4844a5d12163b73 expired before
>> completing.

xiayongquan

Re:Re: flink savepoint问题

In reply to this post by Congxian Qiu

Hi，您好：
我这边有个小流 left join大流的需求，小流的数据夜间基本没有可能会4-5个小时没数据，目前的情况是一到晚上container老是被kill掉，报的是内存溢出。我想问下，我想把托管内存这设置成false，会有什么弊端吗？或者该问题怎么解决？困扰了好久了，请您指点一谢谢。
state.backend.rocksdb.memory.managed : false

在 2020-03-28 11:04:09，"Congxian Qiu" <[hidden email]> 写道：

Yun Tang

Re: Re:Re: flink savepoint问题

Hi

首先，如果这个问题很容易复现的话，我们需要定位到是什么导致了OOMkilled。

1. 打开block-cache usage [1] 观察metrics中block cache的使用量。
2. 麻烦回答一下几个问题，有助于进一步定位
* 单个TM有几个slot
* 单个TM的managed memory配置了多少
* 一共声明了多少个keyed state，（如果使用了window，也相当于会使用一个state），其中有多少个map state，是否经常遍历那个map state
* 被kill的container内一共有几个rocksDB 实例，可以通过搜索日志 "Obtained shared RocksDB cache of size" 计数
* 是否对RocksDB单独配置了options factory或者相关options

state.backend.rocksdb.memory.managed 这个参数的语义是RocksDB使用的内存从Flink来，一个slot内的若干RocksDB实例会共享一块share cache。如果将这个参数设置为false，那么就回退到1.9以前的场景，rocksDB的内存将完全不由Flink管理，在某种程度上来说，更容易被conatiner kill。

如果想要快速缓解这个问题，一种办法是增大 taskmanager.memory.task.off-heap.size [2]，使得提供多一部分内存以供RocksDB超用。其他的缓解办法需要根据您对上面问题的回答来实施

[1] https://ci.apache.org/projects/flink/flink-docs-release-1.10/ops/config.html#state-backend-rocksdb-metrics-block-cache-usage
[2] https://ci.apache.org/projects/flink/flink-docs-stable/ops/config.html#taskmanager-memory-task-off-heap-size

Best
唐云

________________________________
From: xyq <[hidden email]>
Sent: Monday, March 30, 2020 10:41
To: [hidden email] <[hidden email]>
Subject: Re:Re: flink savepoint问题

Hi，您好：
我这边有个小流 left join大流的需求，小流的数据夜间基本没有可能会4-5个小时没数据，目前的情况是一到晚上container老是被kill掉，报的是内存溢出。我想问下，我想把托管内存这设置成false，会有什么弊端吗？或者该问题怎么解决？困扰了好久了，请您指点一谢谢。
state.backend.rocksdb.memory.managed : false

在 2020-03-28 11:04:09，"Congxian Qiu" <[hidden email]> 写道：