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HBase >> mail # user >> HBase UI missing region list for active/functioning table


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Re: HBase UI missing region list for active/functioning table
On Mon, Sep 10, 2012 at 8:33 AM, Norbert Burger
<[EMAIL PROTECTED]> wrote:
> Hi all -- we're currently on cdh3u3 (0.90.4 + patches).  I have one
> table in our cluster which seems to functioning fine (gets/puts/scans
> are all working), but for which no regions are listed on the UI.  The
> table/regions exist in .META.  Other tables in the same cluster show
> their regions list fine.  Seems like this might be a problem with
> .META. or ZK, but would appreciate any pointers.
>
> 1) hbase hbck reports 2 "multiply assigned to region servers"
> inconsistencies, but on a table different than the one I'm having
> problems with.
> 2) The hbase master log shows this fragment when navigating to
> table.jsp for the affected table:
>
> 2012-09-10 11:29:07,682 DEBUG org.apache.zookeeper.ClientCnxn: Reading
> reply sessionid:0x1370e3604c49580, packet:: clientPath:null
> serverPath:null finished:false header:: 10,4  replyHeader::
> 10,167713215,-101  request:: '/hbase/table/sessions,F  response::
> 2012-09-10 11:29:07,682 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKUtil:
> hconnection-0x1370e3604c49580 Unable to get data of znode
> /hbase/table/sessions because node does not exist (not an error)
> 2012-09-10 11:29:07,682 DEBUG
> org.apache.hadoop.hbase.client.MetaScanner: Scanning .META. starting
> at row=sessions,,00000000000000 for max=2147483647 rows
>
> But since I see this "Unable to get data of znode" for all tables, my
> assumption is that it's a red herring.  Any thoughts as how to debug
> further, or why only this table would not show a region list?
>

What happens if you scan .META. in shell?

hbase> scan ".META."

Does it all show?

(You might want to echo into a file so you can poke around after scan is done).

St.Ack