[jira] [Commented] (YARN-1343) NodeManagers additions/restarts are not reported as node updates in AllocateResponse responses to AMs

[Alejandro Abdelnur (JIRA)]

    [ 
https://issues.apache.org/jira/browse/YARN-1343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13809821#comment-13809821
 ] 

Alejandro Abdelnur commented on YARN-1343:
------------------------------------------

[~bikassaha], on your ask about checking for the node count, I don't think is 
necessary, if a reconnect is triggered, it means it was found, in the 
{{ResourceTrackerService.registerNodeManager()}}:

{code}
      RMNode oldNode = this.rmContext.getRMNodes().putIfAbsent(nodeId, rmNode);
    if (oldNode == null) {
      this.rmContext.getDispatcher().getEventHandler().handle(
          new RMNodeEvent(nodeId, RMNodeEventType.STARTED));
    } else {
      LOG.info("Reconnect from the node at: " + host);
      this.nmLivelinessMonitor.unregister(nodeId);
      this.rmContext.getDispatcher().getEventHandler().handle(
          new RMNodeReconnectEvent(nodeId, rmNode));
    }
{code}

thx

> NodeManagers additions/restarts are not reported as node updates in 
> AllocateResponse responses to AMs
> -----------------------------------------------------------------------------------------------------
>
>                 Key: YARN-1343
>                 URL: https://issues.apache.org/jira/browse/YARN-1343
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.2.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>            Priority: Critical
>             Fix For: 2.2.1
>
>         Attachments: YARN-1343.patch, YARN-1343.patch, YARN-1343.patch, 
> YARN-1343.patch
>
>
> If a NodeManager joins the cluster or gets restarted, running AMs never 
> receive the node update indicating the Node is running.



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