补充，还有就是GC收集器，是否无脑使用G1就可以呢？我之前一直是G1，只是最近修改了opts不小心换成其他了。本意不是为了换GC收集器的。
yidan zhao <hinobl...@gmail.com> 于2021年3月9日周二 下午7:26写道： > 观察了下。CPU什么的有尖刺，但是也算基本正常，因为我的任务就是5分钟一波。基本每5分钟都有个尖刺。 > 然后目前通过Flink的web-ui看了下gc情况。 > 发现部分集群的fgc的确有问题，fgc平均大概达到10-20s，当然只有平均值，不清楚是否有某些gc时间更长情况。总难题来说10-20s的确是比较长的，这个我之后会去看看改进下。 > > （1）不过不清楚这个是否和这个问题直接相关，因为20s的卡顿是否足以引起该问题呢？ > （2）此外，大家推荐个内存设置，比如你们都多少TM，每个TM多少内存，跑的任务多大数据量大概。 > 我目前5个TM的集群，单TM100G内存，跑任务大概10w > qps的入口流量，但是很大部分呢会过滤掉，后续部分流量较少。此外，检查点大概达到3-4GB。 > > > Michael Ran <greemqq...@163.com> 于2021年3月9日周二 下午4:27写道： > >> 看看当时的负载呢？有没有过高的情况，是什么原因。然后监控下网络和磁盘 >> 在 2021-03-09 14:57:43，"yidan zhao" <hinobl...@gmail.com> 写道： >> >而且大家推荐怎么设置呢，我可能默认就G1了。不清楚G1是否也需要精调。 >> >我目前设置的内存还是比较大的。（50G的，100G的TaskManager都有），这么大heap，是否需要特别设置啥呢？ >> > >> >或者是否有必要拆小，比如设置10Gheap，然后把taskmanager数量提上去。 >> > >> >yidan zhao <hinobl...@gmail.com> 于2021年3月9日周二 下午2:56写道： >> > >> >> 好的，我会看下。 >> >> 然后我今天发现我好多个集群GC collector不一样。 >> >> 目前发现3种，默认的是G1。flink conf中配置了env.java.opts: >> >> "-XX:-OmitStackTraceInFastThrow"的情况出现了2种，一种是Parallel GC with 83 >> >> threads，还有一种是Mark Sweep Compact GC。 >> >> 大佬们，Flink是根据内存大小有什么动态调整吗。 >> >> >> >> >> >> >> 不使用G1我大概理解了，可能设置了java.opts这个是覆盖，不是追加。本身我只是希望设置下-XX:-OmitStackTraceInFastThrow而已。 >> >> >> >> >> >> 杨杰 <471419...@qq.com> 于2021年3月8日周一 下午3:09写道： >> >> >> >>> Hi, >> >>> >> >>> 可以排查下 GC 情况，频繁 FGC 也会导致这些情况。 >> >>> >> >>> Best, >> >>> jjiey >> >>> >> >>> > 2021年3月8日 14:37，yidan zhao <hinobl...@gmail.com> 写道： >> >>> > >> >>> > >> >>> >> 如题，我有个任务频繁发生该异常然后重启。今天任务启动1h后，看了下WEB-UI的检查点也没，restored达到了8已经。然后Exception页面显示该错误，估计大多数都是因为该错误导致的restore。 >> >>> > 除此外，就是 ‘Job leader for job id eb5d2893c4c6f4034995b9c8e180f01e lost >> >>> > leadership’ 错导致任务重启。 >> >>> > >> >>> > 下面给出刚刚的一个错误日志（环境flink1.12，standalone集群，5JM+5TM，JM和TM混部在相同机器）： >> >>> > 2021-03-08 14:31:40 >> >>> > org.apache.flink.runtime.io >> >>> .network.netty.exception.RemoteTransportException: >> >>> > Error at remote task manager '10.35.185.38/10.35.185.38:2016'. >> >>> > at org.apache.flink.runtime.io.network.netty. >> >>> > CreditBasedPartitionRequestClientHandler.decodeMsg( >> >>> > CreditBasedPartitionRequestClientHandler.java:294) >> >>> > at org.apache.flink.runtime.io.network.netty. >> >>> > CreditBasedPartitionRequestClientHandler.channelRead( >> >>> > CreditBasedPartitionRequestClientHandler.java:183) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeChannelRead( >> >>> > AbstractChannelHandlerContext.java:379) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeChannelRead( >> >>> > AbstractChannelHandlerContext.java:365) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > >> >>> >> AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext >> >>> > .java:357) >> >>> > at org.apache.flink.runtime.io.network.netty. >> >>> > NettyMessageClientDecoderDelegate.channelRead( >> >>> > NettyMessageClientDecoderDelegate.java:115) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeChannelRead( >> >>> > AbstractChannelHandlerContext.java:379) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeChannelRead( >> >>> > AbstractChannelHandlerContext.java:365) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > >> >>> >> AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext >> >>> > .java:357) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > >> >>> >> DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java: >> >>> > 1410) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeChannelRead( >> >>> > AbstractChannelHandlerContext.java:379) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeChannelRead( >> >>> > AbstractChannelHandlerContext.java:365) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > >> DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel.epoll. >> >>> > AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady( >> >>> > AbstractEpollStreamChannel.java:792) >> >>> > at >> >>> org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop >> >>> > .processReady(EpollEventLoop.java:475) >> >>> > at >> >>> org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop >> >>> > .run(EpollEventLoop.java:378) >> >>> > at org.apache.flink.shaded.netty4.io.netty.util.concurrent. >> >>> > SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) >> >>> > 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: org.apache.flink.runtime.io.network.partition. >> >>> > ProducerFailedException: org.apache.flink.util.FlinkException: >> >>> JobManager >> >>> > responsible for eb5d2893c4c6f4034995b9c8e180f01e lost the >> leadership. >> >>> > at org.apache.flink.runtime.io >> .network.netty.PartitionRequestQueue >> >>> > .writeAndFlushNextMessageIfPossible(PartitionRequestQueue.java:221) >> >>> > at org.apache.flink.runtime.io >> .network.netty.PartitionRequestQueue >> >>> > .enqueueAvailableReader(PartitionRequestQueue.java:108) >> >>> > at org.apache.flink.runtime.io >> .network.netty.PartitionRequestQueue >> >>> > .userEventTriggered(PartitionRequestQueue.java:170) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeUserEventTriggered( >> >>> > AbstractChannelHandlerContext.java:346) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeUserEventTriggered( >> >>> > AbstractChannelHandlerContext.java:332) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.fireUserEventTriggered( >> >>> > AbstractChannelHandlerContext.java:324) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > >> >>> >> ChannelInboundHandlerAdapter.userEventTriggered(ChannelInboundHandlerAdapter >> >>> > .java:117) >> >>> > at org.apache.flink.shaded.netty4.io.netty.handler.codec. >> >>> > >> ByteToMessageDecoder.userEventTriggered(ByteToMessageDecoder.java:365) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeUserEventTriggered( >> >>> > AbstractChannelHandlerContext.java:346) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeUserEventTriggered( >> >>> > AbstractChannelHandlerContext.java:332) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.fireUserEventTriggered( >> >>> > AbstractChannelHandlerContext.java:324) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > >> >>> >> DefaultChannelPipeline$HeadContext.userEventTriggered(DefaultChannelPipeline >> >>> > .java:1428) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeUserEventTriggered( >> >>> > AbstractChannelHandlerContext.java:346) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > AbstractChannelHandlerContext.invokeUserEventTriggered( >> >>> > AbstractChannelHandlerContext.java:332) >> >>> > at org.apache.flink.shaded.netty4.io.netty.channel. >> >>> > >> >>> >> DefaultChannelPipeline.fireUserEventTriggered(DefaultChannelPipeline.java: >> >>> > 913) >> >>> > at org.apache.flink.runtime.io >> .network.netty.PartitionRequestQueue >> >>> > .lambda$notifyReaderNonEmpty$0(PartitionRequestQueue.java:87) >> >>> > at org.apache.flink.shaded.netty4.io.netty.util.concurrent. >> >>> > AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) >> >>> > at org.apache.flink.shaded.netty4.io.netty.util.concurrent. >> >>> > >> >>> >> SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) >> >>> > at >> >>> org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop >> >>> > .run(EpollEventLoop.java:387) >> >>> > ... 3 more >> >>> > Caused by: org.apache.flink.util.FlinkException: JobManager >> responsible >> >>> for >> >>> > eb5d2893c4c6f4034995b9c8e180f01e lost the leadership. >> >>> > at org.apache.flink.runtime.taskexecutor.TaskExecutor >> >>> > .disconnectJobManagerConnection(TaskExecutor.java:1422) >> >>> > at >> org.apache.flink.runtime.taskexecutor.TaskExecutor.access$1300( >> >>> > TaskExecutor.java:174) >> >>> > at org.apache.flink.runtime.taskexecutor. >> >>> > >> TaskExecutor$JobLeaderListenerImpl.lambda$null$2(TaskExecutor.java:1856) >> >>> > at java.util.Optional.ifPresent(Optional.java:159) >> >>> > at org.apache.flink.runtime.taskexecutor. >> >>> > >> TaskExecutor$JobLeaderListenerImpl.lambda$jobManagerLostLeadership$3( >> >>> > TaskExecutor.java:1855) >> >>> > at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRunAsync( >> >>> > AkkaRpcActor.java:404) >> >>> > at >> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRpcMessage( >> >>> > AkkaRpcActor.java:197) >> >>> > at org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage( >> >>> > AkkaRpcActor.java:154) >> >>> > at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26) >> >>> > at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21) >> >>> > at >> scala.PartialFunction$class.applyOrElse(PartialFunction.scala:123) >> >>> > at akka.japi.pf >> >>> .UnitCaseStatement.applyOrElse(CaseStatements.scala:21) >> >>> > at >> >>> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:170) >> >>> > at >> >>> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) >> >>> > at >> >>> scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) >> >>> > at akka.actor.Actor$class.aroundReceive(Actor.scala:517) >> >>> > at >> akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:225) >> >>> > at akka.actor.ActorCell.receiveMessage(ActorCell.scala:592) >> >>> > at akka.actor.ActorCell.invoke(ActorCell.scala:561) >> >>> > at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:258) >> >>> > at akka.dispatch.Mailbox.run(Mailbox.scala:225) >> >>> > at akka.dispatch.Mailbox.exec(Mailbox.scala:235) >> >>> > at >> akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) >> >>> > at >> akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool >> >>> > .java:1339) >> >>> > at >> >>> akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) >> >>> > at >> >>> akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread >> >>> > .java:107) >> >>> > Caused by: java.lang.Exception: Job leader for job id >> >>> > eb5d2893c4c6f4034995b9c8e180f01e lost leadership. >> >>> > ... 24 more >> >>> > >> >>> > >> >>> > （1）zookeeper的超时设置的是60s，感觉网络异常zk超时不至于60s都不够。 >> >>> > （2）akka.ask.timeout: 60s >> >>> > taskmanager.network.request-backoff.max： 60000 >> >>> > akka此参数之前也调整为60s了。 >> >>> > >> >>> > 如上信息，希望社区同学们给点思路。 >> >>> > >> >>> >> >>> >> >
