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https://issues.apache.org/jira/browse/HBASE-2058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell closed HBASE-2058.
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> Coprocessors: CPU and memory limit policy enforcment via runtime weaving
> ------------------------------------------------------------------------
>
> Key: HBASE-2058
> URL: https://issues.apache.org/jira/browse/HBASE-2058
> Project: HBase
> Issue Type: Improvement
> Components: Coprocessors
> Reporter: Andrew Kyle Purtell
> Priority: Major
>
> Use the ASM bytecode analysis and rewriting engine to impose some constraints
> on CPU and memory use. This is middle ground between arbitrary function and a
> locked down language.
> We will be given arbitrary bytecode input. It is acceptable to reject a class
> and abort coprocessor loading if it defies analysis at load time such that we
> have insufficient confidence about the result.
> Wrap allocations to simply disallow large allocations. Hook or add finalizers
> to keep a running tally of aggregate heap charge. Disallow allocation beyond
> policy limit.
> Weave CPU usage tracking into loop headers. Throw an uncatchable exception if
> time limits prescribed by policy are exceeded.
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