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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5682) Allow HConnectionImplementation to recover from ZK connection loss (for 0.94 only)
Date Sat, 31 Mar 2012 22:12:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13243312#comment-13243312

stack commented on HBASE-5682:

This is a perversion.

If we pass in a connection from outside, down in the guts, do special handling that makes
the connection and zookeeper handling do reconnect.  Its like we should be passing an Interface
made at a higher-level of abstraction and then in the implementation, it did this fixup when
connection breaks.

With that out of the way, do whatever you need to make it work.  Patch looks fine. How did
you test.  Would it be hard to make a unit test of it.  A unit test would be good codifying
this perversion since it will be brittle being not whats expected.

I'm against changing the behavior of the default case in 0.92/0.94.   I'm interested in problems
you see in hbase-5153 or issues you have w/ the implementation there that being the 0.96 client.
> Allow HConnectionImplementation to recover from ZK connection loss (for 0.94 only)
> ----------------------------------------------------------------------------------
>                 Key: HBASE-5682
>                 URL: https://issues.apache.org/jira/browse/HBASE-5682
>             Project: HBase
>          Issue Type: Improvement
>          Components: client
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 0.94.0
>         Attachments: 5682-v2.txt, 5682.txt
> Just realized that without this HBASE-4805 is broken.
> I.e. there's no point keeping a persistent HConnection around if it can be rendered permanently
unusable if the ZK connection is lost temporarily.
> Note that this is fixed in 0.96 with HBASE-5399 (but that seems to big to backport)

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