[jira] [Commented] (HBASE-24421) Support loading cluster level CPs from Hadoop file system

["Viraj Jasani (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-24421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17114786#comment-17114786 ] 

Viraj Jasani commented on HBASE-24421:
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For CP config in hbase-site, should we have different config key for CP jar path instead of using one more "|" ?

> Support loading cluster level CPs from Hadoop file system
> ---------------------------------------------------------
>
>                 Key: HBASE-24421
>                 URL: https://issues.apache.org/jira/browse/HBASE-24421
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>            Priority: Major
>             Fix For: 3.0.0-alpha-1
>
>
> Right now we allow configuring CPs, which needs to be loaded from hadoop FS, at table level. (Via the Java API or shell)
> > alter 't1', METHOD => 'table_att', 'coprocessor'=>'hdfs:///foo.jar|com.foo.FooRegionObserver|1001|arg1=1,arg2=2'
> But for the cluster level CPs at Master/RS/WAL level, only way is to config at hbase-site.xml. But here we dont allow to specify any jar path. This jira suggest to add such a feature
> Note: We already support config the priority of CP at xml level (FQCN|<priority>).  Same way how shell command works we can take the jar pathalso. <jar path>|<class name>|<priority>
> If no '|' separator at all, consider that as FQCN in the classpath. If one '|' that will be FQCN and priority (Same as of today). If 2 '|' separators we consider the 1st part as path to the external jar.
> This will help in cloud scenario specially with auto scaling. Or else customer should be executing some special scripts to make the CP jar available within the HBase classpath.



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