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From "shanmuganathan.r" <shanmuganatha...@zohocorp.com>
Subject Re: How can i test the Multi master environment?
Date Tue, 09 Aug 2011 06:33:22 GMT

Hi  Stack,

      Thank you for your reply....................



---- On Tue, 09 Aug 2011 03:57:30 +0530 Stack&lt;stack@duboce.net&gt; wrote ---- 


On Mon, Aug 8, 2011 at 4:41 AM, shanmuganathan.r 
&lt;shanmuganathan.r@zohocorp.com&gt; wrote: 
&gt; In the (i) case the whole hbase cluster is stopped. 
&gt; 
 
Yes. 
 
&gt; 
&gt; In the (ii) case the master only killed but the Regionservers are not assign to the
backup master and the backup master is waiting for ZNode to be written 
&gt; 
 
This is not right. Whats supposed to happen is that the first 
master's znode is meant to expire in zk and then the second master 
assumes the original's role. Did the first master come up fine. You 
waited long enough for the first master's znode to expire? 
 
What version of hbase? 
I am using the HBase 0.90.1 How much time it will take to expire the first master Znode expire
?
 
 
&gt; 
&gt; In the (iii)  case also the master only killed but the Regionservers are not assign
to the backup master and the backup master is waiting for the ZNode to be written 
&gt; 
&gt; 
&gt; In the (ii) and (iii) cases, Is the master properly killed? 
 
 
Yes. I'd think so. 
 
 
&gt; If the master is properly killed, than why the region servers are unable to connect
to the backup master ? 
 
They are trying to connect to the first master and will continue so 
until the master's address is updated in zk when the secondary assumes 
master role. 
 
St.Ack 
Regards


Shanmuganathan

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