[jira] [Updated] (HBASE-5047) [Coprocessors] Implement child failure strategies for external coprocessor host

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-5047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell updated HBASE-5047:
----------------------------------

    Assignee:     (was: Andrew Purtell)

> [Coprocessors] Implement child failure strategies for external coprocessor host
> -------------------------------------------------------------------------------
>
>                 Key: HBASE-5047
>                 URL: https://issues.apache.org/jira/browse/HBASE-5047
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Coprocessors
>            Reporter: Andrew Purtell
>
> There should be three selectable strategies:
> 1. Close and reopen the region, triggering force termination of the stuck child on close, and fork/initialization of a new child on open, along with reinit of all region related resources, other coprocessors, etc.
> 2. Unload/reload the malfunctioning coprocessor. Will require some work in the coprocessor framework to actually support unloading in a reasonable way. The JVM may make this complicated for integrated CPs, so perhaps just for those hosted in external processes.
> 3. Unload/terminate the malfunctioning coprocessor and continue operation. Consider changes in the CP framework for temporary blacklisting, will need that to avoid loading the suspect CP after a split.



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