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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5682) Allow HConnectionImplementation to recover from ZK connection loss (for 0.94 only)
Date Mon, 02 Apr 2012 17:31:24 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244359#comment-13244359
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Lars Hofhansl commented on HBASE-5682:
--------------------------------------

Presumably close it not needed since the connection is known to be down in this case. To be
save, I'll add that, and make sure it doesn't cause another hang.

I think this is better than HBASE-5153, because it attempts to reconnect when the connection
is needed and not when it was lost (in which case it is likely that the next retry will fail
as well, leading to long hangs with no change for the caller to notice).

                
> 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
>            Priority: Critical
>             Fix For: 0.94.0
>
>         Attachments: 5682-all-v2.txt, 5682-all-v3.txt, 5682-all.txt, 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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