[jira] [Updated] (HBASE-8684) Table Coprocessor can't access external HTable by default

["Jesse Yates (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-8684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesse Yates updated HBASE-8684:
-------------------------------

    Attachment: hbase-8684-0.94-v0.patch

Attaching patch with the test for CP table access and fixing the configuration creation by adding CompoundConfiguration#deepCopy to get the same functional behavior as the original intention.

Should probably add a test for deepCopy, but I'll do that if people are +1 on the rest.
                
> Table Coprocessor can't access external HTable by default
> ---------------------------------------------------------
>
>                 Key: HBASE-8684
>                 URL: https://issues.apache.org/jira/browse/HBASE-8684
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>             Fix For: 0.94.9
>
>         Attachments: hbase-8684-0.94-v0.patch
>
>
> With the default configuration passed to a RegionCoprocessor environment, you cannot reach an HTable on the same cluster (at least in 0.94 - no verified yet in 0.96/8). The reason is in the usage of CompoundConfiguration (backported to 0.94 in HBASE-8176) when loading a table coprocessor we just do (RegionCoprocessorHost, ln 182):
> {code}
> Configuration newConf = new Configuration(conf);
> // set per-table cfspec properties
> {code}
> but the conf we pass in a CompoundConfiguration, which means the copy constructor from Configuration doesn't work at all. 
> So, we really need two things:
>  1. A test that we can reach another HTable in the same cluster via a coprocessor by default
>  2. Fixing the configuration creation in RegionCoprocessorHost to support (1)

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