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Date: Tue, 12 Aug 2008 16:55:44 -0700 (PDT)
From: "stack (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-18) [hbase] A sequence of
 create/delete/create/etc. generates 'info:regioninfo is empty; has keys:'
 and eventually fails
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    [ https://issues.apache.org/jira/browse/HBASE-18?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622036#action_12622036 ] 

stack commented on HBASE-18:
----------------------------

Just wrote a little loop in shell doing create/delete.  Runs for a good while but then craps out with:

{code}
hbase(main):001:0> list
NativeException: java.lang.NullPointerException: null
        from org/apache/hadoop/hbase/client/HConnectionManager.java:300:in `processRow'
        from org/apache/hadoop/hbase/client/MetaScanner.java:62:in `metaScan'
        from org/apache/hadoop/hbase/client/MetaScanner.java:29:in `metaScan'
        from org/apache/hadoop/hbase/client/HConnectionManager.java:307:in `listTables'
{code}

Eventually recovers.

So I suppose its better than it was.

Goes too fast.  I see the create/delete messages in master but not the opening of the region out on the regionserver.  This is async I suppose?

> [hbase] A sequence of create/delete/create/etc. generates 'info:regioninfo is empty; has keys:' and eventually fails
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-18
>                 URL: https://issues.apache.org/jira/browse/HBASE-18
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>            Priority: Minor
>         Attachments: hbase-dave-master-hendrix.log
>
>
> Marking as minor issue since its a concurrency issue in admin function.  Though that said, this is a guaranteed way to generate rows in META that are without their regioninfo (Looks like we might add startcode and servername after a row has had its regioninfo removed).
> Issue was found by Dave Simpson running a create/delete/create sequence.  Attaching log.

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