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Posted to issues@tez.apache.org by "Harish Jaiprakash (JIRA)" <ji...@apache.org> on 2017/01/05 10:43:58 UTC

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

     [ https://issues.apache.org/jira/browse/TEZ-3566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Harish Jaiprakash updated TEZ-3566:
-----------------------------------
    Attachment: TEZ-3566.02.patch

Changing code to not inspect the FileSystem config variables, instead limiting the size of hash set to prevent OOM.

> 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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