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https://issues.apache.org/jira/browse/HBASE-7205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13511126#comment-13511126
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Ted Yu commented on HBASE-7205:
-------------------------------
Using patch v2, I got the following test failure:
{code}
testHBase3810(org.apache.hadoop.hbase.coprocessor.TestClassLoading) Time
elapsed: 7.976 sec <<< FAILURE!
java.lang.AssertionError: Class SimpleRegionObserver was missing on a region
at org.junit.Assert.fail(Assert.java:93)
at org.junit.Assert.assertTrue(Assert.java:43)
at
org.apache.hadoop.hbase.coprocessor.TestClassLoading.testHBase3810(TestClassLoading.java:415)
{code}
> 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
> Assignee: Ted Yu
> Priority: Critical
> Fix For: 0.96.0, 0.94.4
>
> Attachments: 7205-v1.txt, HBASE-7205_v2.patch
>
>
> 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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