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Date: Fri, 2 Sep 2016 09:05:20 +0000 (UTC)
From: "Rohith Sharma K S (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.13001854.1472686218000.477423.1472807120475@Atlassian.JIRA>
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References: <JIRA.13001854.1472686218000@Atlassian.JIRA> <JIRA.13001854.1472686218810@arcas>
Subject: [jira] [Commented] (YARN-5608) TestAMRMClient.setup() fails with
 ArrayOutOfBoundsException
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archived-at: Fri, 02 Sep 2016 09:05:22 -0000


    [ https://issues.apache.org/jira/browse/YARN-5608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15458000#comment-15458000 ] 

Rohith Sharma K S commented on YARN-5608:
-----------------------------------------

The current patch wait for NodeManager to register in loop. Instead of adding new loop in the test , MiniYarnCluster provides an API to waitForNm to  connect. The same API can be used may after cluster is started call verifyConnections method. 
{code}
  private void verifyConnections() throws InterruptedException, YarnException {
    assertTrue("NMs failed to connect to the RM",
        cluster.waitForNodeManagersToConnect(20000));
    verifyClientConnection();
  }
{code}

> TestAMRMClient.setup() fails with ArrayOutOfBoundsException
> -----------------------------------------------------------
>
>                 Key: YARN-5608
>                 URL: https://issues.apache.org/jira/browse/YARN-5608
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.8.0
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>         Attachments: YARN-5608.002.patch, YARN-5608.003.patch, YARN-5608.004.patch, YARN-5608.patch
>
>
> After 39 runs the {{TestAMRMClient}} test, I encountered:
> {noformat}
> java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
>        	at java.util.ArrayList.rangeCheck(ArrayList.java:635)
>        	at java.util.ArrayList.get(ArrayList.java:411)
>        	at org.apache.hadoop.yarn.client.api.impl.TestAMRMClient.setup(TestAMRMClient.java:144)
> {noformat}
> I see it shows up occasionally in the error emails as well.


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