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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3039) [Aggregator wireup] Implement ATS app-appgregator service discovery
Date Fri, 13 Mar 2015 04:53:39 GMT

    [ https://issues.apache.org/jira/browse/YARN-3039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14359936#comment-14359936
] 

Junping Du commented on YARN-3039:
----------------------------------

[~sjlee0], Thanks for comments here! In my understanding, if timelineServiceAddress is not
null, the pollTimelineServiceAddress() can be fast return as below. Isn't it? Do you think
we still need a null check here?
{code}
  private int pollTimelineServiceAddress(int retries) {
    while (timelineServiceAddress == null && retries > 0) {
      try {
        Thread.sleep(this.serviceRetryInterval);
      } catch (InterruptedException e) {
        Thread.currentThread().interrupt();
      }
      timelineServiceAddress = getTimelineServiceAddress();
      retries--;
    }
    return retries;
  }
{code}

> [Aggregator wireup] Implement ATS app-appgregator service discovery
> -------------------------------------------------------------------
>
>                 Key: YARN-3039
>                 URL: https://issues.apache.org/jira/browse/YARN-3039
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Junping Du
>         Attachments: Service Binding for applicationaggregator of ATS (draft).pdf, Service
Discovery For Application Aggregator of ATS (v2).pdf, YARN-3039-no-test.patch, YARN-3039-v2-incomplete.patch,
YARN-3039-v3-core-changes-only.patch, YARN-3039-v4.patch, YARN-3039-v5.patch
>
>
> Per design in YARN-2928, implement ATS writer service discovery. This is essential for
off-node clients to send writes to the right ATS writer. This should also handle the case
of AM failures.



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