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]
