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Date: Wed, 1 Feb 2017 22:13:52 +0000 (UTC)
From: "Li Lu (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.13039616.1485986647000.11408.1485987232036@Atlassian.JIRA>
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References: <JIRA.13039616.1485986647000@Atlassian.JIRA> <JIRA.13039616.1485986647875@jira-lw-us.apache.org>
Subject: [jira] [Commented] (YARN-6137) Yarn client implicitly invoke ATS
 client which accesses HDFS
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archived-at: Wed, 01 Feb 2017 22:13:56 -0000


    [ https://issues.apache.org/jira/browse/YARN-6137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15849020#comment-15849020 ] 

Li Lu commented on YARN-6137:
-----------------------------

This appears to be an ATS v1.5 only issue, but a bigger question is, why do we need a timeline client within YarnClientImpl? To me the only thing needed is to renew delegation token. If this reference is inevitable, can we avoid creating the client at service start of yarn client impl? We can lazily create the client only when we need to renew the token? 

> Yarn client implicitly invoke ATS client which accesses HDFS
> ------------------------------------------------------------
>
>                 Key: YARN-6137
>                 URL: https://issues.apache.org/jira/browse/YARN-6137
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Yesha Vora
>            Assignee: Li Lu
>
> Yarn is implicitly trying to invoke ATS Client even though client does not need it. and ATSClient code is trying to access hdfs. Due to that service is hitting GSS exception. 
> Yarnclient is implicitly creating ats client that tries to access Hdfs.
> All servers that use yarnclient cannot be expected to change to accommodate this behavior.


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