shen guanpu created HBASE-6465:
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Summary: Load balancer repeatedly close and open region in the
same regionserver.
Key: HBASE-6465
URL: https://issues.apache.org/jira/browse/HBASE-6465
Project: HBase
Issue Type: Bug
Components: master, regionserver
Affects Versions: 0.94.0
Reporter: shen guanpu
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 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
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