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https://issues.apache.org/jira/browse/HBASE-7205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13502887#comment-13502887
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Lars Hofhansl commented on HBASE-7205:
--------------------------------------

The other option is to revert HBASE-6308 from 0.94 and only put that fix into 
0.96. (At this point I am favoring that)
                
> Coprocessor classloader is replicated for all regions in the HRegionServer
> --------------------------------------------------------------------------
>
>                 Key: HBASE-7205
>                 URL: https://issues.apache.org/jira/browse/HBASE-7205
>             Project: HBase
>          Issue Type: Bug
>          Components: Coprocessors
>    Affects Versions: 0.92.2, 0.94.2
>            Reporter: Adrian Muraru
>            Priority: Critical
>             Fix For: 0.96.0, 0.94.4
>
>
> HBASE-6308 introduced a new custom CoprocessorClassLoader to load the 
> coprocessor classes and a new instance of this CL is created for each single 
> HRegion opened. This leads to OOME-PermGen when the number of regions go 
> above hundres / region server. 
> Having the table coprocessor jailed in a separate classloader is good however 
> we should create only one for all regions of a table in each HRS.

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