Scan of large meta takes a long time and so can see stale data; can result is
double region assignment
------------------------------------------------------------------------------------------------------
Key: HBASE-1573
URL: https://issues.apache.org/jira/browse/HBASE-1573
Project: Hadoop HBase
Issue Type: Bug
Reporter: stack
Fix For: 0.19.4
Here is example of a scan that takes a while because 6k regions acting on stale
data resulting in double assignment of region:
{code}
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:06,220 INFO org.apache.hadoop.hbase.master.ServerManager: Received
MSG_REPORT_OPEN: enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748:
safeMode=false from XX.XX.45.121:20020
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:06,220 INFO org.apache.hadoop.hbase.master.RegionServerOperation:
enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 open on XX.XX.45.121:20020
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:06,220 INFO org.apache.hadoop.hbase.master.RegionServerOperation:
updating row enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 in region
.META.,,1 with with startcode !?B and server XX.XX.45.121:20020
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:06,397 DEBUG org.apache.hadoop.hbase.master.BaseScanner: Current
assignment of enwikibase,Cwj0sehVeEbnrUDR_j0xok==,1245604540748 is not valid;
Server 'XX.XX.44.95:20020' unknown.
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:06,582 INFO org.apache.hadoop.hbase.master.RegionManager: Assigning
region enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 to XX.XX.45.97:20020
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:09,587 INFO org.apache.hadoop.hbase.master.ServerManager: Received
MSG_REPORT_PROCESS_OPEN: enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748:
safeMode=false from XX.XX.45.97:20020
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:12,614 INFO org.apache.hadoop.hbase.master.ServerManager: Received
MSG_REPORT_OPEN: enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748:
safeMode=false from XX.XX.45.97:20020
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:13,549 INFO org.apache.hadoop.hbase.master.RegionServerOperation:
enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 open on XX.XX.45.97:20020
hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22
10:56:13,549 INFO org.apache.hadoop.hbase.master.RegionServerOperation:
updating row enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 in region
.META.,,1 with with startcode !?? and server XX.XX.45.97:20020
{code}
We've just updated the server info in the master because of the region open
message but the scan sees old info in the .META. table though .META. was just
updated.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
