*hi,Ted Yu,thanks for your reply:* the hbase and hadoop version is HBase Version0.94.0, r1332822Hadoop Version0.20.2-cdh3u1, rbdafb1dbffd0d5f2fbc6ee022e1c8df6500fd638 the following is a detail log about the same region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956, and it repeats again and again.: 2012-07-16 00:12:49,843 INFO org.apache.hadoop.hbase.master.HMaster: balance hri=trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956., src=192.168.1.2,60020,1342017399608, dest=192.168.1.2,60020,1342002082592 2012-07-16 00:12:49,843 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Starting unassignment of region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. (offlining) 2012-07-16 00:12:49,843 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x4384d0a47f40068 Creating unassigned node for 93caf5147d40f5dd4625e160e1b7e956 in a CLOSING state 2012-07-16 00:12:49,845 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Sent CLOSE to 192.168.1.2,60020,1342017399608 for region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. 2012-07-16 00:12:50,555 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=RS_ZK_REGION_CLOSED, server=192.168.1.2,60020,1342017399608, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:12:50,555 DEBUG org.apache.hadoop.hbase.master.handler.ClosedRegionHandler: Handling CLOSED event for 93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:12:50,555 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Forcing OFFLINE; was=trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. state=CLOSED, ts=1342368770556, server=192.168.1.2,60020,1342017399608 2012-07-16 00:12:50,555 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x4384d0a47f40068 Creating (or updating) unassigned node for 93caf5147d40f5dd4625e160e1b7e956 with OFFLINE state 2012-07-16 00:12:50,558 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=M_ZK_REGION_OFFLINE, server=10.75.18.34,60000,1342017369575, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:12:50,558 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Found an existing plan for trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. destination server is 192.168.1.2,60020,1342002082592 2012-07-16 00:12:50,558 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Using pre-existing plan for region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956.; plan=hri=trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956., src=192.168.1.2,60020,1342017399608, dest=192.168.1.2,60020,1342002082592 2012-07-16 00:12:50,558 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Assigning region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. to 192.168.1.2,60020,1342002082592 2012-07-16 00:12:50,574 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=RS_ZK_REGION_OPENING, server=192.168.1.2,60020,1342017399608, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:12:50,635 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=RS_ZK_REGION_OPENING, server=192.168.1.2,60020,1342017399608, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:12:50,639 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=RS_ZK_REGION_OPENED, server=192.168.1.2,60020,1342017399608, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:12:50,639 DEBUG org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Handling OPENED event for trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. from 192.168.1.2,60020,1342017399608; deleting unassigned node 2012-07-16 00:12:50,640 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x4384d0a47f40068 Deleting existing unassigned node for 93caf5147d40f5dd4625e160e1b7e956 that is in expected state RS_ZK_REGION_OPENED 2012-07-16 00:12:50,641 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: The znode of region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. has been deleted. 2012-07-16 00:12:50,641 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x4384d0a47f40068 Successfully deleted unassigned node for region 93caf5147d40f5dd4625e160e1b7e956 in expected state RS_ZK_REGION_OPENED 2012-07-16 00:12:50,641 INFO org.apache.hadoop.hbase.master.AssignmentManager: The master has opened the region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. that was online on 192.168.1.2,60020,1342017399608 2012-07-16 00:17:49,870 INFO org.apache.hadoop.hbase.master.HMaster: balance hri=trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956., src=192.168.1.2,60020,1342017399608, dest=192.168.1.2,60020,1342002082592 2012-07-16 00:17:49,870 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Starting unassignment of region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. (offlining) 2012-07-16 00:17:49,870 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x4384d0a47f40068 Creating unassigned node for 93caf5147d40f5dd4625e160e1b7e956 in a CLOSING state 2012-07-16 00:17:49,872 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Sent CLOSE to 192.168.1.2,60020,1342017399608 for region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. 2012-07-16 00:17:50,464 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=RS_ZK_REGION_CLOSED, server=192.168.1.2,60020,1342017399608, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:17:50,464 DEBUG org.apache.hadoop.hbase.master.handler.ClosedRegionHandler: Handling CLOSED event for 93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:17:50,464 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Forcing OFFLINE; was=trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. state=CLOSED, ts=1342369070465, server=192.168.1.2,60020,1342017399608 2012-07-16 00:17:50,464 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x4384d0a47f40068 Creating (or updating) unassigned node for 93caf5147d40f5dd4625e160e1b7e956 with OFFLINE state 2012-07-16 00:17:50,467 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=M_ZK_REGION_OFFLINE, server=10.75.18.34,60000,1342017369575, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:17:50,467 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Found an existing plan for trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. destination server is 192.168.1.2,60020,1342002082592 2012-07-16 00:17:50,467 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Using pre-existing plan for region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956.; plan=hri=trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956., src=192.168.1.2,60020,1342017399608, dest=192.168.1.2,60020,1342002082592 2012-07-16 00:17:50,467 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Assigning region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. to 192.168.1.2,60020,1342002082592 2012-07-16 00:17:50,509 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=RS_ZK_REGION_OPENING, server=192.168.1.2,60020,1342017399608, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:17:50,761 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=RS_ZK_REGION_OPENING, server=192.168.1.2,60020,1342017399608, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:17:50,774 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling transition=RS_ZK_REGION_OPENED, server=192.168.1.2,60020,1342017399608, region=93caf5147d40f5dd4625e160e1b7e956 2012-07-16 00:17:50,774 DEBUG org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Handling OPENED event for trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. from 192.168.1.2,60020,1342017399608; deleting unassigned node 2012-07-16 00:17:50,774 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x4384d0a47f40068 Deleting existing unassigned node for 93caf5147d40f5dd4625e160e1b7e956 that is in expected state RS_ZK_REGION_OPENED 2012-07-16 00:17:50,775 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: The znode of region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. has been deleted. 2012-07-16 00:17:50,775 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x4384d0a47f40068 Successfully deleted unassigned node for region 93caf5147d40f5dd4625e160e1b7e956 in expected state RS_ZK_REGION_OPENED 2012-07-16 00:17:50,775 INFO org.apache.hadoop.hbase.master.AssignmentManager: The master has opened the region trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. that was online on 192.168.1.2,60020,1342017399608 2012-07-16 00:22:49,916 INFO org.apache.hadoop.hbase.master.HMaster: balance hri=trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956., src=192.168.1.2,60020,1342017399608, dest=192.168.1.2,60020,1342002082592 …………
2012/7/17 Ted Yu <yuzhih...@gmail.com> > Which HBase version were you using ? > > The log messages below were in very short time period. Can you provide more > logs ? > > Thanks > > On Tue, Jul 17, 2012 at 5:09 AM, Howard <rj03...@gmail.com> wrote: > > > Through the master and regionserver log,I find load balancer repeatedly > > close and open region in the same regionserver(period in > > hbase.balancer.period ). > > Does this is a bug in load balancer and how can I dig into or avoid this? > > The log like this: > > 2012-07-16 00:12:50,055 INFO > > org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to > > open region: > > > > > trackurl_status_list,zOwMwdi,1342294447440.7608037379153932a30f4bdd6d7edf5d. > > 2012-07-16 00:12:50,069 INFO > > org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to > > open region: > > > > > trackurl_comment_list,zO7vqv1,1342192347676.0c9036e183055ff2df93eca348aeeada. > > 2012-07-16 00:12:50,206 INFO > > org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to > > open region: > > > > > trackurl_status_list,zOzYDL9,1342294447440.47eb162f6aecffcddfa897fdbb70472b. > > 2012-07-16 00:12:50,301 INFO > > org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to > > open region: > > > > > trackurl_status_list,zOM1HZP,1342293292587.9af5de3db0bad0470d9b8fe6b9eadf14. > > 2012-07-16 00:12:50,428 INFO > > org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to > > open region: > > > > > trackurl_status_list,zOPKLDi,1342293292587.f89dbfc1dad366c991eba3c248228637. > > 2012-07-16 00:12:50,562 INFO > > org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to > > open region: > > > > > trackurl_status_list,zO6u4o8,1342291884831.93caf5147d40f5dd4625e160e1b7e956. > > 2012-07-16 00:12:50,685 INFO > > org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to > > open region: > > > > > trackurl_status_list,zOIR8Tw,1342283152067.6284e9f69042266cde88a7b19071d701. > > 2012-07-16 00:12:50,791 INFO > > org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to > > open region: > > > > > trackurl_comment_list,zOqzaNw,1342195266309.bd8e19c1063f4f2984f9ca63365c5573. > > >
