[jira] [Comment Edited] (TEZ-3566) OOM because of too many DFSClient instances in TokenCache.obtainTokensForFileSystems

["Siddharth Seth (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TEZ-3566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15810919#comment-15810919 ] 

Siddharth Seth edited comment on TEZ-3566 at 1/9/17 7:32 AM:
-------------------------------------------------------------

-+1. Committing. Thanks [~harishjp]-
On second thought.
Any particular reason to skip using the fs API to determine if the cache size is enabled or not?
Is it possible to add a log line, which gets triggered once this condition is hit?


was (Author: sseth):
+1. Committing. Thanks [~harishjp]

> OOM because of too many DFSClient instances in TokenCache.obtainTokensForFileSystems
> ------------------------------------------------------------------------------------
>
>                 Key: TEZ-3566
>                 URL: https://issues.apache.org/jira/browse/TEZ-3566
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Harish Jaiprakash
>            Assignee: Harish Jaiprakash
>         Attachments: TEZ-3566.01.patch, TEZ-3566.02.patch
>
>
> When FileSystem cache is disabled, invoking TokenCache.obtainTokensForFileSystems creates lot of FileSystem objects which are unique and stored in a hash set. This takes up lot of memory and causes OOM.



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