The command "balance_switch true" returns true, but the command "balancer" returns false. I checked the HMaster UI and found some regions of other tables in transition, not of this table.
This table's name is E_MP_DAY_READ, I did grep it in the master log and found only the following lines: 2014-04-15 15:50:59,925 INFO [MASTER_SERVER_OPERATIONS-b03:60000-1] handler.ServerShutdownHandler: Skip assigning region E_MP_DAY_READ,160001123745_2014-01-25:00:00:00,1395753408476.ba5c8291f8dad37d5b9621b7334c17b0. because it has been opened in a04.jsepc.com,60020,1397548219084 2014-04-15 15:50:59,926 INFO [MASTER_SERVER_OPERATIONS-b03:60000-1] handler.ServerShutdownHandler: Skip assigning region E_MP_DAY_READ,300007915618_2014-03-13:00:00:00,1395994146202.ec4e397baffd1cc40bdc18ce0ab2f28a. because it has been opened in a04.jsepc.com,60020,1397548219084 2014-04-15 15:50:59,926 INFO [MASTER_SERVER_OPERATIONS-b03:60000-1] handler.ServerShutdownHandler: Skip assigning region E_MP_DAY_READ,300013608840_2014-02-21:00:00:00,1395749573711.744bab52befec279a7ee97497801e10f. because it has been opened in a04.jsepc.com,60020,1397548219084 2014-04-15 15:50:59,937 INFO [MASTER_SERVER_OPERATIONS-b03:60000-2] handler.ServerShutdownHandler: Skip assigning region E_MP_DAY_READ,300000497780_2014-01-23:00:00:00,1395746363941.79b831e698053b1005f7a97c9f2a6ddc. because it has been opened in a04.jsepc.com,60020,1397548219084 2014-04-15 15:50:59,938 INFO [MASTER_SERVER_OPERATIONS-b03:60000-2] handler.ServerShutdownHandler: Skip assigning region E_MP_DAY_READ,300008188567_2014-03-04:00:00:00,1395756104426.eb1806c2dc5833152b6b5e7b5e4a88b8. because it has been opened in a04.jsepc.com,60020,1397548219084 2014-04-15 15:50:59,940 INFO [MASTER_SERVER_OPERATIONS-b03:60000-2] handler.ServerShutdownHandler: Skip assigning region E_MP_DAY_READ,300016987143_2014-01-21:00:00:00,1395986789897.e4d143865d354bdc2a427c1f00df6ad7. because it has been opened in a04.jsepc.com,60020,1397548219084 so few logging lines about it, looks strange ? BTW, I can spread the regions of this table evenly across the whole cluster after I shutdown the two region servers where the regions of this table resided originally. 2014-04-15 19:47 GMT+08:00 Ted Yu <[email protected]>: > Is load balancer enabled ? > > Can you grep this table in master log and pastebin what you found ? > > Cheers > > On Apr 15, 2014, at 4:40 AM, Tao Xiao <[email protected]> wrote: > > > I am using HDP 2.0.6, which has 18 nodes(region servers). One of my HBase > > tables has 50 regions but I found that the 50 regions all stay in just > two > > nodes, not spread evenly in the 18 nodes. I did not pre-create splits so > > this table was gradually split into 50 regions itself. > > > > I'd like to know why all the regions stay in just two nodes, not the 18 > > nodes of the cluster, and how to spread the regions evenly across all the > > region servers. Thanks. >
