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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-10309) Cancel flink job occurs java.net.ConnectException
Date Tue, 02 Oct 2018 10:57:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-10309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16635282#comment-16635282
] 

ASF GitHub Bot commented on FLINK-10309:
----------------------------------------

GJL opened a new pull request #6785: [FLINK-10309][rest] Before shutting down cluster, wait
for asynchronous operations
URL: https://github.com/apache/flink/pull/6785
 
 
   ## What is the purpose of the change
   
   *Wait for the result of asynchronous operations to be served before shutting down the cluster.
 This is necessary for the _"cancel with savepoint"_ operation. If we do not wait for the
result to be accessed by the client, we may shutdown the cluster, and the client gets a `ConnectionException`.*
   
   cc: @zentol @tillrohrmann 
   
   ## Brief change log
   
     - *Before shutting down cluster, wait for asynchronous operations.*
     - *Log stacktrace if checkpoint cannot be ack'ed.*
   
   
   ## Verifying this change
   
   This change added tests and can be verified as follows:
   
     - *Added test to `RestServerEndpointITCase` to verify that handlers are closed first.*
     - *Added unit tests for `CompletedOperationCache`.*
     - *Verified the changes by submitting and cancelling with savepoint of a job in a loop.*
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes
/ **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing,
Yarn/Mesos, ZooKeeper: (**yes** / no / don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (**not applicable** / docs / JavaDocs / not
documented)
   

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> Cancel flink job occurs java.net.ConnectException
> -------------------------------------------------
>
>                 Key: FLINK-10309
>                 URL: https://issues.apache.org/jira/browse/FLINK-10309
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Coordination, REST
>    Affects Versions: 1.5.3, 1.6.0, 1.7.0
>            Reporter: vinoyang
>            Assignee: Gary Yao
>            Priority: Critical
>              Labels: pull-request-available
>             Fix For: 1.7.0, 1.6.2, 1.5.5
>
>
> The problem occurs when using the Yarn per-job detached mode. Trying to cancel with savepoint
fails with the following exception before being able to retrieve the savepoint path:
> exception stack trace : 
> {code:java}
> org.apache.flink.util.FlinkException: Could not cancel job xxxx.
>         at org.apache.flink.client.cli.CliFrontend.lambda$cancel$4(CliFrontend.java:585)
>         at org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:960)
>         at org.apache.flink.client.cli.CliFrontend.cancel(CliFrontend.java:577)
>         at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1034)
>         at java.lang.Thread.run(Thread.java:748)
> Caused by: java.util.concurrent.ExecutionException: org.apache.flink.runtime.concurrent.FutureUtils$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:1895)
>         at org.apache.flink.client.program.rest.RestClusterClient.cancelWithSavepoint(RestClusterClient.java:398)
>         at org.apache.flink.client.cli.CliFrontend.lambda$cancel$4(CliFrontend.java:583)
>         ... 6 more
> Caused by: org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not
complete the operation. Number of retries has been exhausted.
>         at org.apache.flink.runtime.concurrent.FutureUtils.lambda$retryOperationWithDelay$5(FutureUtils.java:213)
>         at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760)
>         at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736)
>         at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
>         at java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
>         at org.apache.flink.runtime.rest.RestClient.lambda$submitRequest$1(RestClient.java:274)
>         at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:680)
>         at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:603)
>         at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:563)
>         at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:424)
>         at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:268)
>         at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:284)
>         at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528)
>         at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
>         at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
>         at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
>         at org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
>         at org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
>         ... 1 more
> Caused by: java.util.concurrent.CompletionException: java.net.ConnectException: Connect
refuse: xxx/xxx.xxx.xxx.xxx:xxx
>         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:943)
>         at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
>         ... 16 more
> Caused by: java.net.ConnectException: Connect refuse: xxx/xxx.xxx.xxx.xxx:xxx
>         at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>         at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
>         at org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:224)
>         at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:281)
>         ... 7 more
> {code}
> some discussion in mailing list : 
> http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/Cancel-flink-job-occur-exception-td24056.html



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