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Posted to dev@lens.apache.org by "Amareshwari Sriramadasu (JIRA)" <ji...@apache.org> on 2016/08/18 12:03:20 UTC

[jira] [Commented] (LENS-1278) Seeing too many instances of UDFClassloader getting created

    [ https://issues.apache.org/jira/browse/LENS-1278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15426320#comment-15426320 ] 

Amareshwari Sriramadasu commented on LENS-1278:
-----------------------------------------------

Proposing to make SessionClassLoader extend UDFClassLoader to avoid the above. Will dig more and update if there are drawbacks because of this.

> Seeing too many instances of UDFClassloader getting created
> -----------------------------------------------------------
>
>                 Key: LENS-1278
>                 URL: https://issues.apache.org/jira/browse/LENS-1278
>             Project: Apache Lens
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 2.6
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Amareshwari Sriramadasu
>            Priority: Critical
>             Fix For: 2.6
>
>
> We are seeing too many instances of UDFClassloader objects :
>  grep 'ClassLoader' jmap.dump 
>  1439 138144 org.apache.hadoop.hive.ql.exec.UDFClassLoader
>  1789 128808 sun.reflect.DelegatingClassLoader
>   270 25920 org.apache.lens.server.session.SessionClassLoader
> Mostly because of this - https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java#L1794



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