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https://issues.apache.org/jira/browse/HBASE-11898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14121607#comment-14121607
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Vladimir Rodionov commented on HBASE-11898:
-------------------------------------------
The additional observed overhead is explained here:
https://bugs.openjdk.java.net/browse/JDK-6642881?page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel
Class.getClassLoader() is expensive op because of JNI nature.
CoprocessorHost.Environment
{code}
@Override
public ClassLoader getClassLoader() {
return impl.getClass().getClassLoader();
}
{code}
does not do any attempts to cache class loader instance.
> CoprocessorHost.Environment should cache class loader instance
> --------------------------------------------------------------
>
> Key: HBASE-11898
> URL: https://issues.apache.org/jira/browse/HBASE-11898
> Project: HBase
> Issue Type: Bug
> Components: Coprocessors
> Affects Versions: 0.98.6
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Fix For: 0.98.7
>
>
> HBASE-9941 fix causes additional overhead...
> It looks like for every invocation it does a getClassLoader call.
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