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https://issues.apache.org/jira/browse/FLINK-9410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16500198#comment-16500198
 ] 

ASF GitHub Bot commented on FLINK-9410:
---------------------------------------

Github user zhangminglei commented on a diff in the pull request:

    https://github.com/apache/flink/pull/6087#discussion_r192736907
  
    --- Diff: 
flink-yarn/src/main/java/org/apache/flink/yarn/YarnResourceManager.java ---
    @@ -406,6 +407,43 @@ public void onError(Throwable error) {
                onFatalError(error);
        }
     
    +   @Override
    +   public void onContainerStarted(ContainerId containerId, Map<String, 
ByteBuffer> allServiceResponse) {
    +           log.info("The container {} started.", containerId);
    +   }
    +
    +   @Override
    +   public void onContainerStatusReceived(ContainerId containerId, 
ContainerStatus containerStatus) {
    +   }
    +
    +   @Override
    +   public void onContainerStopped(ContainerId containerId) {
    +           log.info("The container {} is stopped.", containerId);
    +   }
    +
    +   @Override
    +   public void onStartContainerError(ContainerId containerId, Throwable t) 
{
    +           log.error("Could not start TaskManager in container {}.", 
containerId, t);
    +
    +           // release the failed container
    +           YarnWorkerNode yarnWorkerNode = workerNodeMap.remove(new 
ResourceID(containerId.toString()));
    --- End diff --
    
    Will change.


> Replace NMClient with NMClientAsync in YarnResourceManager
> ----------------------------------------------------------
>
>                 Key: FLINK-9410
>                 URL: https://issues.apache.org/jira/browse/FLINK-9410
>             Project: Flink
>          Issue Type: Improvement
>          Components: Distributed Coordination
>    Affects Versions: 1.5.0, 1.6.0
>            Reporter: Till Rohrmann
>            Assignee: mingleizhang
>            Priority: Critical
>             Fix For: 1.6.0
>
>
> Currently, the {{YarnResourceManager}} uses the synchronous {{NMClient}} 
> which is called from within the main thread of the {{ResourceManager}}. Since 
> these operations are blocking, we should replace the client with the 
> {{NMClientAsync}} and make the calls non blocking.



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