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From Peter Wolf <opus...@gmail.com>
Subject Re: Region Server Crash
Date Tue, 13 Mar 2012 19:04:54 GMT
Ah ha!  That's useful to know.  Here's all the details

Attribute Name 	Value 	Description
HBase Version 	0.90.4-cdh3u2, r 	HBase version and svn revision
HBase Compiled 	Thu Oct 13 20:32:26 PDT 2011, jenkins 	When HBase 
version was compiled and by whom
Metrics 	requests=0, regions=177, stores=1542, storefiles=1251, 
storefileIndexSize=100, memstoreSize=1, compactionQueueSize=0, 
flushQueueSize=0, usedHeap=530, maxHeap=995, blockCacheSize=161721360, 
blockCacheFree=47128768, blockCacheCount=2236, blockCacheHitCount=0, 
blockCacheMissCount=37422, blockCacheEvictedCount=8255, 
blockCacheHitRatio=0, blockCacheHitCachingRatio=0 	RegionServer Metrics; 
file and heap sizes are in megabytes
Zookeeper Quorum 	hbase-nn.babelcentral.com:2181 	Addresses of all 
registered ZK servers

I don't think I have stored any very large objects.  Could a bug in my 
code bring down a region server by writing a very large object?

Thanks again

On 3/13/12 2:52 PM, Stack wrote:
> On Tue, Mar 13, 2012 at 10:20 AM, Peter Wolf<opus111@gmail.com>  wrote:
>> Actually, I am using the Cloudera Version CDH3.  Should have said...
> Which CDH3?  u1,2, or 3?
>> So, I guess that's OK.
>> However, I wasn't hitting it that hard.  I had 4 clients each writing about
>> 1000 bytes about 2/second.
> Thats not hard.
>> What is a Fat Cell, and how do I query the number of Regions/Server?
> Fat cells is a fuzzy term for entries that are megabytes in size...>
> 10MB or so.
> To find out how many regions, you look at the regionserver UI.
> St.Ack

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