As per another recent thread. This is still an issue. On Wed, 19 Jan 2022 at 06:36, Chesnay Schepler <ches...@apache.org> wrote:
> This is a serialization bug in Flink, see > https://issues.apache.org/jira/browse/FLINK-24550. > It will be fixed in the upcoming 1.14.3 release. > > On 19/01/2022 09:01, Caizhi Weng wrote: > > 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 >> Type Committed Used Maximum >> Heap 2.87 GB 571 MB 2.87 GB >> Non-Heap 136 MB 128 MB 744 MB >> Outside JVM Memory >> Type Count Used Capacity >> Direct 33 642 KB 642 KB >> Mapped 0 0 B 0 B >> Garbage Collection >> Collector Count Time >> 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] >>>>>>> >>>>>>> >
