Hi! To print out gc logs of job manager you can add this configuration to flink-conf.yaml
env.java.opts.jobmanager: -Xloggc:/tmp/jobmanager-gc.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps This will print gc logs to /tmp/jobmanager-gc.log. I'm not familiar with the garbage collection metrics page. If the unit of time is ms then gc does not seem to be heavy. However I would still recommend to print out gc logs for a double check. John Smith <java.dev....@gmail.com> 于2022年1月19日周三 06:43写道： > I think I may know what is causing the issue... So I have 3 job managers. > > 1- I Navigated to a non leader UI and submitted a new job... > 2- The UI timed out with grey lines > 3- Some Internal Server error messages appeared. > 4- Going back to the leader UI checking the running jobs, the job seems to > have been submitted and running. > 5- Going back to the job manager UI that failed, now shows ok. > > And the logs are as follows... And below are the GC metrics from the UI. > > 2022-01-18 22:33:24,574 INFO > org.apache.flink.client.deployment.application.executors.EmbeddedExecutor > [] - Job 2297fdac52fa7191afee9ec4ff11c805 is submitted. > 2022-01-18 22:33:24,574 INFO > org.apache.flink.client.deployment.application.executors.EmbeddedExecutor > [] - Submitting Job with JobId=2297fdac52fa7191afee9ec4ff11c805. > 2022-01-18 22:34:00,618 ERROR org.apache.flink.runtime.rest.handler.job. > JobDetailsHandler [] - Unhandled exception. > java.util.concurrent.CancellationException: null > at java.util.concurrent.CompletableFuture.cancel(CompletableFuture.java: > 2276) ~[?:1.8.0_312] > at org.apache.flink.runtime.rest.handler.legacy.DefaultExecutionGraphCache > .getExecutionGraphInternal(DefaultExecutionGraphCache.java:98) > ~[flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.runtime.rest.handler.legacy.DefaultExecutionGraphCache > .getExecutionGraphInfo(DefaultExecutionGraphCache.java:67) ~[flink-dist_2. > 12-1.14.2.jar:1.14.2] > at org.apache.flink.runtime.rest.handler.job.AbstractExecutionGraphHandler > .handleRequest(AbstractExecutionGraphHandler.java:81) ~[flink-dist_2.12- > 1.14.2.jar:1.14.2] > at org.apache.flink.runtime.rest.handler.AbstractRestHandler > .respondToRequest(AbstractRestHandler.java:83) ~[flink-dist_2.12-1.14.2 > .jar:1.14.2] > at org.apache.flink.runtime.rest.handler.AbstractHandler.respondAsLeader( > AbstractHandler.java:195) ~[flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler > .lambda$channelRead0$0(LeaderRetrievalHandler.java:83) ~[flink-dist_2.12- > 1.14.2.jar:1.14.2] > at java.util.Optional.ifPresent(Optional.java:159) [?:1.8.0_312] > at org.apache.flink.util.OptionalConsumer.ifPresent(OptionalConsumer.java: > 45) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler > .channelRead0(LeaderRetrievalHandler.java:80) [flink-dist_2.12-1.14.2.jar: > 1.14.2] > at org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler > .channelRead0(LeaderRetrievalHandler.java:49) [flink-dist_2.12-1.14.2.jar: > 1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java: > 99) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:379) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:365) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.fireChannelRead( > AbstractChannelHandlerContext.java:357) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.runtime.rest.handler.router.RouterHandler.routed( > RouterHandler.java:115) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.runtime.rest.handler.router.RouterHandler > .channelRead0(RouterHandler.java:94) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.runtime.rest.handler.router.RouterHandler > .channelRead0(RouterHandler.java:55) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java: > 99) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:379) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:365) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.fireChannelRead( > AbstractChannelHandlerContext.java:357) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.handler.codec. > MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) > [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:379) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:365) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.fireChannelRead( > AbstractChannelHandlerContext.java:357) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.runtime.rest.FileUploadHandler.channelRead0( > FileUploadHandler.java:238) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.runtime.rest.FileUploadHandler.channelRead0( > FileUploadHandler.java:71) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java: > 99) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:379) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:365) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.fireChannelRead( > AbstractChannelHandlerContext.java:357) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > CombinedChannelDuplexHandler$DelegatingChannelHandlerContext > .fireChannelRead(CombinedChannelDuplexHandler.java:436) [flink-dist_2.12- > 1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.handler.codec. > ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) > [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.handler.codec. > ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) > [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler > .java:251) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:379) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:365) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.fireChannelRead( > AbstractChannelHandlerContext.java:357) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline > .java:1410) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:379) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel. > AbstractChannelHandlerContext.invokeChannelRead( > AbstractChannelHandlerContext.java:365) [flink-dist_2.12-1.14.2.jar:1.14.2 > ] > at org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline > .fireChannelRead(DefaultChannelPipeline.java:919) [flink-dist_2.12-1.14.2 > .jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel.nio. > AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) > [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop > .processSelectedKey(NioEventLoop.java:719) [flink-dist_2.12-1.14.2.jar: > 1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop > .processSelectedKeysOptimized(NioEventLoop.java:655) [flink-dist_2.12-1.14 > .2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop > .processSelectedKeys(NioEventLoop.java:581) [flink-dist_2.12-1.14.2.jar: > 1.14.2] > at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run( > NioEventLoop.java:493) [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.util.concurrent. > SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) > [flink-dist_2.12-1.14.2.jar:1.14.2] > at org.apache.flink.shaded.netty4.io.netty.util.internal. > ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [flink-dist_2.12-1.14.2 > .jar:1.14.2] > at java.lang.Thread.run(Thread.java:748) [?:1.8.0_312] > > These are the stats displayed on the UI for the garbage collector... > > Advanced > JVM (Heap/Non-Heap) Memory > TypeCommittedUsedMaximum > Heap 2.87 GB 571 MB 2.87 GB > Non-Heap 136 MB 128 MB 744 MB > Outside JVM Memory > TypeCountUsedCapacity > Direct 33 642 KB 642 KB > Mapped 0 0 B 0 B > Garbage Collection > CollectorCountTime > PS_MarkSweep 3 346 > PS_Scavenge 83 2772 > > > On Tue, 18 Jan 2022 at 17:15, John Smith <java.dev....@gmail.com> wrote: > >> Sorry, unhandled exception. >> >> On Tue, 18 Jan 2022 at 15:16, John Smith <java.dev....@gmail.com> wrote: >> >>> Also that I handled exception is printed in job managers. >>> >>> On Tue., Jan. 18, 2022, 10:11 a.m. John Smith, <java.dev....@gmail.com> >>> wrote: >>> >>>> I actually mean the job manager. I run a total of three job managers >>>> for HA. >>>> >>>> For example of I click running jobs, it displays light grey boxes for a >>>> while and then top right corner throws internal server error. But after if >>>> I refresh it's ok I see the list. It seems to happen on the non leader job >>>> manager UIs. Looking at the UI metric for the job manager doesn't seem to >>>> indicate anything out of the ordinary. >>>> >>>> Is there a java 8 command tool that can hook into the live PID and >>>> display GC stats? >>>> >>>> On Mon., Jan. 17, 2022, 12:06 a.m. Caizhi Weng, <tsreape...@gmail.com> >>>> wrote: >>>> >>>>> Hi! >>>>> >>>>> "When I use the UI and just navigate from one jobmanager ui to the >>>>> other", I guess you mean you're talking about task managers instead of job >>>>> managers (there is only one job manager per web ui). >>>>> >>>>> This long pause usually indicates that the component (no matter task >>>>> managers or job manager) you're jumping to is very busy so that they can't >>>>> handle web requests. This is not a healthy state and you should look into >>>>> it. The most probable cause is heavy GC. To determine this you can print >>>>> GC >>>>> details to log and see if there are long GC pauses. >>>>> >>>>> John Smith <java.dev....@gmail.com> 于2022年1月15日周六 09:53写道： >>>>> >>>>>> Hi using 1.14.2, running 3 job nodes. >>>>>> >>>>>> Everything seems to work ok. >>>>>> >>>>>> When I use the UI and just navigate from one jobmanager ui to the >>>>>> other, it sometimes seems to take long or timeout and I see an "Internal >>>>>> Server Error" popup on the top right messages. >>>>>> >>>>>> Looking at the logs I see this, but not sure it's related... >>>>>> >>>>>> 2022-01-15 00:04:44,925 ERROR >>>>>> org.apache.flink.runtime.rest.handler.job.JobExceptionsHandler [] - >>>>>> Unhandled exception. >>>>>> java.util.concurrent.CancellationException: null >>>>>> at >>>>>> java.util.concurrent.CompletableFuture.cancel(CompletableFuture.java:2276) >>>>>> ~[?:1.8.0_312] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.legacy.DefaultExecutionGraphCache.getExecutionGraphInternal(DefaultExecutionGraphCache.java:98) >>>>>> ~[flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.legacy.DefaultExecutionGraphCache.getExecutionGraphInfo(DefaultExecutionGraphCache.java:67) >>>>>> ~[flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.job.AbstractExecutionGraphHandler.handleRequest(AbstractExecutionGraphHandler.java:81) >>>>>> ~[flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.AbstractRestHandler.respondToRequest(AbstractRestHandler.java:83) >>>>>> ~[flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.AbstractHandler.respondAsLeader(AbstractHandler.java:195) >>>>>> ~[flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler.lambda$channelRead0$0(LeaderRetrievalHandler.java:83) >>>>>> ~[flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at java.util.Optional.ifPresent(Optional.java:159) [?:1.8.0_312] >>>>>> at >>>>>> org.apache.flink.util.OptionalConsumer.ifPresent(OptionalConsumer.java:45) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler.channelRead0(LeaderRetrievalHandler.java:80) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler.channelRead0(LeaderRetrievalHandler.java:49) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.router.RouterHandler.routed(RouterHandler.java:115) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.router.RouterHandler.channelRead0(RouterHandler.java:94) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.handler.router.RouterHandler.channelRead0(RouterHandler.java:55) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.FileUploadHandler.channelRead0(FileUploadHandler.java:238) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.runtime.rest.FileUploadHandler.channelRead0(FileUploadHandler.java:71) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at >>>>>> org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) >>>>>> [flink-dist_2.12-1.14.2.jar:1.14.2] >>>>>> at java.lang.Thread.run(Thread.java:748) [?:1.8.0_312] >>>>>> >>>>>>
