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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3112) Enable and disable of table needs a bit of loving in new master
Date Fri, 22 Oct 2010 23:17:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924075#action_12924075
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Jean-Daniel Cryans commented on HBASE-3112:
-------------------------------------------

While testing if HBASE-2522 was still there with the new master, I found out that we assign
the parent regions when we re-enable the table (but disabling seems to work ok).

> Enable and disable of table needs a bit of loving in new master
> ---------------------------------------------------------------
>
>                 Key: HBASE-3112
>                 URL: https://issues.apache.org/jira/browse/HBASE-3112
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Priority: Critical
>             Fix For: 0.90.0
>
>
> The tools are in place to do a more reliable enable/disable of tables.  Some work has
been done to hack in a basic enable/disable but its not enough -- see the test avro/thrift
tests where a disable/enable/disable switchback can confuse the table state (and has been
disabled until this issue addressed).
> This issue is about finishing off enable/disable in the new master.   I think we need
to add to the table znode an enabling/disabling state rather than have them binary with a
watcher that will stop an enable (or disable) starting until the previous completes (Currently
we atomically switch the state though the region close/open lags -- some work in enable/disable
handlers helps in that they won't complete till all regions have transitioned.. but its not
enough).
> Need to add tests too.
> Marking issue critical bug because loads of the questions we get on lists are about enable/disable
probs.

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