Yes, you're right. While count the .META., the result will exclude the -ROOT- region and the .META. region. Pardon me ,I should not mention about that. Maybe the less 2 region is just a coincidence here, I can show another scenario about this problem:
From WebUI, we can see that: Address Start Code Load C4C3.site:60030 1305620850621 requests=0, regions=10227, usedHeap=2161, maxHeap=8175 C4C4.site:60030 1305620851291 requests=0, regions=10234, usedHeap=2593, maxHeap=8175 C4C5.site:60030 1305620851505 requests=0, regions=10227, usedHeap=2191, maxHeap=8175 Total: servers: 3 requests=0, regions=30688 From HMaster logs: 2011-05-18 10:06:08,382 INFO org.apache.hadoop.hbase.master.LoadBalancer: Skipping load balancing. servers=3 regions=30681 average=10227.0 mostloaded=10227 leastloaded=10227 2011-05-18 10:06:13,365 DEBUG org.apache.hadoop.hbase.zookeeper.ZKUtil: hconnection opening connection to ZooKeeper with ensemble (C4C3:2181,C4C2:2181,C4C1:2181) 30681 & 30688 7 region differ from this scenario. Thanks! Regards, Jieshan Bean -----邮件原件----- 发件人: [email protected] [mailto:[email protected]] 代表 Christopher Tarnas 发送时间: 2011年5月17日 22:40 收件人: [email protected] 主题: Re: Regions count is not consistant between the WEBUI and LoaderBalancer .META. does not include region information for itself or -ROOT- so a count of .META. should always be two regions less than the total number. -chris On Tue, May 17, 2011 at 4:32 AM, bijieshan <[email protected]> wrote: > This problem seems happened with high probability, I have saw it several > times. > > Here's the description about this problem: > > 1.From the WEBUI, I can see the regions count is:35087. > 2.From the HBase shell, I counted the '.META.' table, and it showed there's > 35085 regions. > > hbase(main):001:0> count '.META.',10000 > 11/05/14 14:12:22 INFO jute.BinaryInputArchive: Expecting maxBufferString > as an integer but got as null.Hence setting to default value 1048575 > Current count: 10000, row: > hello,080472,1305272720373.ec0eb8c1bb414967241155cf0985241e. > Current count: 20000, row: > hello,161272,1305272956858.e16008645368590dfa735abc61024db6. > Current count: 30000, row: > ufdr,061870,1305171874909.eddc77cbfa2f93feef49f4485d9b88a5. > 35085 row(s) in 2.5250 seconds > > 3.From the HMaster logs, I saw that: > > 2011-05-14 14:13:57,546 INFO org.apache.zookeeper.ClientCnxn: EventThread > shut down > 2011-05-14 14:14:01,303 INFO org.apache.hadoop.hbase.master.LoadBalancer: > Skipping load balancing. servers=4 regions=35089 average=8772.25 > mostloaded=8773 leastloaded=8773 > 2011-05-14 14:14:08,706 DEBUG > org.apache.hadoop.hbase.master.CatalogJanitor: Scanned 35085 catalog row(s) > and gc'd 0 unreferenced parent region(s) > > 35087 & 35085 , so where's the problem? Were they from the different sets? > > Thanks! > > Regards, > Jieshan Bean > > > >
