Hi Team,

While restarting Flink application from CHECKPOINT, facing the following
Error(intermittently), but it does not impact Job getting submitted or
functionality. But still wondering what could be the reason and solution ?

*RUN Command:*

/usr/lib/flink/bin/flink run
   \
-s
*s3://bucket-app/flink/checkpoint/app/0c9be9b65962e068b6b138ed81f7ae14/chk-13229/*
  \
-c com.comp.App                                     \
-m yarn-cluster
  \
-yjm 4096m
   \
-ytm 6144m
   \
-ynm flink-app                                                        \
-yt ${app_install_path}/conf
   \
${app_install_path}/*.jar
  \
--conffile ${app_install_path}/application.properties
  \
--app App


*ERROR Messages:*

*Job has been submitted with JobID e510e34928101ed53cb08df6d3d29f69*
13:00:35.488 [main] ERROR org.apache.flink.client.cli.CliFrontend - Error
while running the command.
org.apache.flink.client.program.ProgramInvocationException: The main method
caused an error:
org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not
complete the operation. Number of retries has been exhausted.
        at
org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:302)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:198)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:149)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:699)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:232)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:916)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:992)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at java.security.AccessController.doPrivileged(Native Method)
~[?:1.8.0_265]
        at javax.security.auth.Subject.doAs(Subject.java:422) [?:1.8.0_265]
        at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1893)
[hadoop-common-2.10.0-amzn-0.jar:?]
        at
org.apache.flink.runtime.security.contexts.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:992)
[flink-dist_2.11-1.11.0.jar:1.11.0]
Caused by: java.util.concurrent.ExecutionException:
org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not
complete the operation. Number of retries has been exhausted.
        at
java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1908)
~[?:1.8.0_265]
        at
org.apache.flink.client.program.StreamContextEnvironment.getJobExecutionResult(StreamContextEnvironment.java:116)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.client.program.StreamContextEnvironment.execute(StreamContextEnvironment.java:80)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1699)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at com.directv.dis.DisFlinkService.execute(DisFlinkService.java:73)
~[?:?]
        at
com.directv.dis.DisFlinkEmrApplication.main(DisFlinkEmrApplication.java:38)
~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
~[?:1.8.0_265]
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
~[?:1.8.0_265]
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[?:1.8.0_265]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_265]
        at
org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:288)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        ... 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$8(FutureUtils.java:302)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1990)
~[?:1.8.0_265]
        at
org.apache.flink.runtime.rest.RestClient.lambda$submitRequest$1(RestClient.java:342)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:500)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:493)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:472)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:413)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:538)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:531)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:111)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:323)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:339)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_265]
Caused by: java.util.concurrent.CompletionException:
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException:
Connection refused: ip-10-0-11-57.us-west-2.compute.internal/
10.0.11.57:46637
        at
java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:957)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:940)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
~[?:1.8.0_265]
        at
java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1990)
~[?:1.8.0_265]
        at
org.apache.flink.runtime.rest.RestClient.lambda$submitRequest$1(RestClient.java:342)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:500)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:493)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:472)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:413)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:538)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:531)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:111)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:323)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:339)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_265]
Caused by:
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException:
Connection refused: ip-10-0-11-57.us-west-2.compute.internal/
10.0.11.57:46637
Caused by: java.net.ConnectException: Connection refused
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
~[?:1.8.0_265]
        at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:714)
~[?:1.8.0_265]
        at
org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:336)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:685)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:632)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:549)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:511)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:918)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
~[flink-dist_2.11-1.11.0.jar:1.11.0]
        at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_265]

------------------------------------------------------------
 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$RetryException: Could not
complete the operation. Number of retries has been exhausted.
        at
org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:302)
        at
org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:198)
        at
org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:149)
        at
org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:699)
        at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:232)
        at
org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:916)
        at
org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:992)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1893)
        at
org.apache.flink.runtime.security.contexts.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
        at
org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:992)
Caused by: java.util.concurrent.ExecutionException:
org.apache.flink.runtime.concurrent.FutureUtils$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:1908)
        at
org.apache.flink.client.program.StreamContextEnvironment.getJobExecutionResult(StreamContextEnvironment.java:116)
        at
org.apache.flink.client.program.StreamContextEnvironment.execute(StreamContextEnvironment.java:80)
        at
org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1699)
        at com.directv.dis.DisFlinkService.execute(DisFlinkService.java:73)
        at
com.directv.dis.DisFlinkEmrApplication.main(DisFlinkEmrApplication.java:38)
        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:288)
        ... 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$8(FutureUtils.java:302)
        at
java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774)
        at
java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750)
        at
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
        at
java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1990)
        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: ip-10-0-11-57.us-west-2.compute.internal/
10.0.11.57:46637
        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:957)
        at
java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:940)
        ... 19 more
Caused by:
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannel$AnnotatedConnectException:
Connection refused: ip-10-0-11-57.us-west-2.compute.internal/
10.0.11.57:46637
Caused by: java.net.ConnectException: Connection refused
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:714)
        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)

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