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From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4460) Support running an embedded ThriftServer within a RegionServer
Date Thu, 22 Sep 2011 22:33:26 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13112971#comment-13112971
] 

Gary Helmling commented on HBASE-4460:
--------------------------------------

.bq Open to your feedback on what I can do to better integrate with security stuff but not
sure what I can do at this point.

For the current patch on HBASE-4099, I think not much other than make sure we have a way of
flagging that the ThriftServer is embedded so we skip the login.  Though in that case I can't
picture wanting to do embedded thrift + security at the same time, since all thrift clients
would have effective access as the region server process user (circumventing security).

The embedded thrift server + login + security might all work together if we:
* add a User.loginAndReturnUser() variant that delegates to UserGroupInformation.loginUserFromKeytabAndReturnUGI(),
then returns a wrapping User instance
* call this method on startup for the embedded thrift server to get the thrift user instance
* use User.runAs() to execute the body of HRegionThriftServer.run() as the logged in thrift
user

In any case, all of that seems like it should go in a separate JIRA.

> Support running an embedded ThriftServer within a RegionServer
> --------------------------------------------------------------
>
>                 Key: HBASE-4460
>                 URL: https://issues.apache.org/jira/browse/HBASE-4460
>             Project: HBase
>          Issue Type: New Feature
>          Components: regionserver, thrift
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>         Attachments: HBASE-4460-v1.patch
>
>
> Rather than a separate process, it can be advantageous in some situations for each RegionServer
to embed their own ThriftServer.  This allows each embedded ThriftServer to short-circuit
any queries that should be executed on the local RS and skip the extra hop.  This then enables
the building of fat Thrift clients that cache region locations and avoid extra hops all together.
> This JIRA is just about the embedded ThriftServer.  Will open others for the rest.

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