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From xyq <xiayongquan1...@163.com>
Subject Re:Re: flink savepoint问题
Date Mon, 30 Mar 2020 02:41:48 GMT
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" <qcx978132955@gmail.com> 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 <xiayongquan1011@163.com> 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.
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