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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10357) Memory Leak in UserGroupInformation.doAs for JDBC Connection to Hive
Date Thu, 27 Mar 2014 14:47:15 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13949406#comment-13949406

Daryn Sharp commented on HADOOP-10357:

That's rather bad behavior.  It's universally changing the auth type which will affect all
connections.  RPCv9 should be able to work due to negotiation, but earlier RPC versions like
1.x will likely fail if thrift enables security and the client attempts a kerberized connection
to an insecure NN/JT/etc.

> Memory Leak in UserGroupInformation.doAs for JDBC Connection to Hive
> --------------------------------------------------------------------
>                 Key: HADOOP-10357
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10357
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 1.2.0
>            Reporter: Larry McCay
>         Attachments: visualvm-hive.png
> When using UGI.doAs in order to make a connection there appears to be a memory leak involving
the UGI that is used for the doAs and the UGI held by TUGIAssumingTransport.
> When using this approach to establishing a JDBC connection in an environment that will
serve many users and requests client side eventually runs out of memory.

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