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From stack <st...@duboce.net>
Subject Re: Questions from a newbie
Date Thu, 17 Dec 2009 23:35:23 GMT
On Thu, Dec 17, 2009 at 10:44 AM, Xueling Shu <xshu@systemsbiology.org>wrote:

> Hi there:
>
> I followed the tutorial and set up a standalone environment, but then
> experienced some problems.
>
> 1. Whenever I executed "start-hbase.sh", an exception will be thrown. The
> server can still be started. But if I know how to get rid of the exception
> that would be great.
>
>   localhost: starting zookeeper, logging to
>
> /home/xshu/tools/hadoop/hbase-0.20.2/bin/../logs/hbase-xshu-zookeeper-carolina.out
>   starting master, logging to
>
> /home/xshu/tools/hadoop/hbase-0.20.2/bin/../logs/hbase-xshu-master-carolina.out
>   java.io.IOException:
> org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode =
> NoNode for /hbase/master
>


This is transient exception that shows on startup.  Its harmless.  Its not
logged in head of the 0.20 branch IIRC.

>
>
> 2. I created a table and populated some data. But whenever I tried to
> disable the table, the following exception is thrown:
>
> 09/12/17 10:20:40 DEBUG client.HConnectionManager$TableServers: Cache hit
> for row <> in tableName .META.: location server 10.10.6.244:42752,
> location
> region name .META.,,1
> 09/12/17 10:20:40 DEBUG client.HConnectionManager$TableServers:
> Rowscanned=1, rowsOffline=0
> 09/12/17 10:20:40 DEBUG client.HBaseAdmin: Sleep. Waiting for all regions
> to
> be disabled from Genome
> 09/12/17 10:20:44 DEBUG client.HBaseAdmin: Wake. Waiting for all regions to
> be disabled from Genome
> NativeException: org.apache.hadoop.hbase.RegionException: Retries
> exhausted,
> it took too long to wait for the table Genome to be disabled.
>

Yeah, enable/disable is flakey (See
https://issues.apache.org/jira/browse/HBASE-1636).  Do it a few times and it
usually works eventually.  To be fixed in 0.21.

St.Ack

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