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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12575) Sanity check table coprocessor classes are loadable
Date Sun, 07 Dec 2014 22:34:13 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-12575:
-----------------------------------
    Attachment: HBASE-12575.patch

Ok, this is ready. Let's just check table coprocessor class availability and call it a day
as this is the reported problem.

We could do just a bit more and check if the store engine class is loadable, but that isn't
very useful. A store engine implementation determines what flusher, compactor, or compaction
policy class to use. The choices are unknowable without an instance. We _could_ create a test
StoreEngine instance in the master, but we'd need to create a real test Store first - components
like the compactor want to look at a Store object for configuration in their constructor -
and so I think that gets out of hand.

> Sanity check table coprocessor classes are loadable
> ---------------------------------------------------
>
>                 Key: HBASE-12575
>                 URL: https://issues.apache.org/jira/browse/HBASE-12575
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Enis Soztutar
>            Assignee: Andrew Purtell
>             Fix For: 1.0.0, 2.0.0, 0.98.9
>
>         Attachments: HBASE-12575.patch, HBASE-12575.patch, HBASE-12575.patch, HBASE-12575.patch
>
>
> We load coprocessors and other classes from configuration. In case of a typo in the class
name (or deployment problem) a create table / alter table with wrong class name brings down
the whole cluster. 
> Master already does sanity check for compression and region split policy classes introduced
in HBASE-10591. We should extend that to check some other common cases as well. 



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