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Date: Mon, 2 Apr 2012 18:51:23 +0000 (UTC)
From: "nkeywal (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-5682) Allow HConnectionImplementation to
 recover from ZK connection loss (for 0.94 only)
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    [ https://issues.apache.org/jira/browse/HBASE-5682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244440#comment-13244440 ] 

nkeywal commented on HBASE-5682:
--------------------------------

.bq none of ZKUtil methods actually throw exceptions
>From what is see on 0.96 it should, as the return is not reached: the pattern is too call keeperException, and keeperException throws an exception.
{noformat}
  public void keeperException(KeeperException ke)
  throws KeeperException {
    LOG.error(prefix("Received unexpected KeeperException, re-throwing exception"), ke);
    throw ke;
  }
{noformat}

                
> 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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