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From Eran Kutner <e...@gigya.com>
Subject Re: Errors after major compaction
Date Sun, 03 Jul 2011 07:00:19 GMT
It does seem that both servers opened the same region around the same time.
The region was offline because I disabled the table so I can change its TTL.

Here is the log from haddop1-s05 :
2011-06-29 16:37:12,576 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to open
region:
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:37:12,680 DEBUG
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Processing
open of
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:37:12,680 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x33004a38816050b Attempting to transition node
584dac5cc70d8682f71c4675a843c309 from M_ZK_REGION_OFFLINE to
RS_ZK_REGION_OPENING
2011-06-29 16:37:12,711 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x33004a38816050b Successfully transitioned node
584dac5cc70d8682f71c4675a843c309 from M_ZK_REGION_OFFLINE to
RS_ZK_REGION_OPENING
2011-06-29 16:37:12,711 DEBUG org.apache.hadoop.hbase.regionserver.HRegion:
Opening region: REGION => {NAME =>
'gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.',
STARTKEY => 'GSLoad_1308518553_168_WEB204', ENDKEY =>
'GSLoad_1308518810_1249_WEB204', ENCODED =>
584dac5cc70d8682f71c4675a843c309, TABLE => {{NAME => 'gs_raw_events',
FAMILIES => [{NAME => 'events', BLOOMFILTER => 'NONE', REPLICATION_SCOPE =>
'1', VERSIONS => '3', COMPRESSION => 'LZO', TTL => '604800', BLOCKSIZE =>
'65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}]}}
2011-06-29 16:37:12,711 DEBUG org.apache.hadoop.hbase.regionserver.HRegion:
Instantiated
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:37:12,847 DEBUG org.apache.hadoop.hbase.regionserver.Store:
loaded
hdfs://hadoop1-m1:8020/hbase/gs_raw_events/584dac5cc70d8682f71c4675a843c309/events/1971818821800304360,
isReference=false, isBulkLoadResult=false, seqid=1162228062,
majorCompaction=false
2011-06-29 16:37:12,848 INFO org.apache.hadoop.hbase.regionserver.HRegion:
Onlined
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.;
next sequenceid=1162228063
2011-06-29 16:37:12,849 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x33004a38816050b Attempting to transition node
584dac5cc70d8682f71c4675a843c309 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_OPENING
2011-06-29 16:37:12,875 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x33004a38816050b Successfully transitioned node
584dac5cc70d8682f71c4675a843c309 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_OPENING
2011-06-29 16:37:12,951 INFO org.apache.hadoop.hbase.catalog.MetaEditor:
Updated row
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
in region .META.,,1 with server=hadoop1-s05.farm-ny.gigya.com:60020,
startcode=1307349217076
2011-06-29 16:37:12,951 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x33004a38816050b Attempting to transition node
584dac5cc70d8682f71c4675a843c309 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_OPENED
2011-06-29 16:37:12,964 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x33004a38816050b Successfully transitioned node
584dac5cc70d8682f71c4675a843c309 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_OPENED
2011-06-29 16:37:12,964 DEBUG
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Opened
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:40:00,878 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to open
region:
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:40:00,878 DEBUG
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Processing
open of
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:40:01,079 WARN
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Attempted
open of
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
but already online on this server
2011-06-29 16:43:50,395 DEBUG
org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction (major)
requested for
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
because User-triggered major compaction; priority=1, compaction queue
size=1248
2011-06-29 20:19:49,906 INFO org.apache.hadoop.hbase.regionserver.HRegion:
Starting major compaction on region
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 20:19:49,906 INFO org.apache.hadoop.hbase.regionserver.Store:
Started compaction of 1 file(s) in cf=events  into
hdfs://hadoop1-m1:8020/hbase/gs_raw_events/584dac5cc70d8682f71c4675a843c309/.tmp,
seqid=1162228062, totalSize=98.3m
2011-06-29 20:19:49,906 DEBUG org.apache.hadoop.hbase.regionserver.Store:
Compacting
hdfs://hadoop1-m1:8020/hbase/gs_raw_events/584dac5cc70d8682f71c4675a843c309/events/1971818821800304360,
keycount=6882816, bloomtype=NONE, size=98.3m
2011-06-29 20:19:59,920 INFO org.apache.hadoop.hbase.regionserver.HRegion:
completed compaction on region
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
after 10sec

And here is the one from hadoop1-s02:
2011-06-29 16:43:57,935 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: Received request to open
region:
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:43:58,990 DEBUG
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Processing
open of
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:43:58,990 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x23004a31d8904de Attempting to transition node
584dac5cc70d8682f71c4675a843c309 from M_ZK_REGION_OFFLINE to
RS_ZK_REGION_OPENING
2011-06-29 16:43:59,002 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x23004a31d8904de Successfully transitioned node
584dac5cc70d8682f71c4675a843c309 from M_ZK_REGION_OFFLINE to
RS_ZK_REGION_OPENING
2011-06-29 16:43:59,002 DEBUG org.apache.hadoop.hbase.regionserver.HRegion:
Opening region: REGION => {NAME =>
'gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.',
STARTKEY => 'GSLoad_1308518553_168_WEB204', ENDKEY =>
'GSLoad_1308518810_1249_WEB204', ENCODED =>
584dac5cc70d8682f71c4675a843c309, TABLE => {{NAME => 'gs_raw_events',
FAMILIES => [{NAME => 'events', BLOOMFILTER => 'NONE', REPLICATION_SCOPE =>
'1', VERSIONS => '3', COMPRESSION => 'LZO', TTL => '604800', BLOCKSIZE =>
'65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}]}}
2011-06-29 16:43:59,003 DEBUG org.apache.hadoop.hbase.regionserver.HRegion:
Instantiated
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
2011-06-29 16:43:59,204 DEBUG org.apache.hadoop.hbase.regionserver.Store:
loaded
hdfs://hadoop1-m1:8020/hbase/gs_raw_events/584dac5cc70d8682f71c4675a843c309/events/1971818821800304360,
isReference=false, isBulkLoadResult=false, seqid=1162228062,
majorCompaction=false
2011-06-29 16:43:59,205 INFO org.apache.hadoop.hbase.regionserver.HRegion:
Onlined
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.;
next sequenceid=1162228063
2011-06-29 16:43:59,205 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x23004a31d8904de Attempting to transition node
584dac5cc70d8682f71c4675a843c309 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_OPENING
2011-06-29 16:43:59,212 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x23004a31d8904de Successfully transitioned node
584dac5cc70d8682f71c4675a843c309 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_OPENING
2011-06-29 16:43:59,214 INFO org.apache.hadoop.hbase.catalog.MetaEditor:
Updated row
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
in region .META.,,1 with server=hadoop1-s02.farm-ny.gigya.com:60020,
startcode=1306919627544
2011-06-29 16:43:59,214 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x23004a31d8904de Attempting to transition node
584dac5cc70d8682f71c4675a843c309 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_OPENED
2011-06-29 16:43:59,224 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x23004a31d8904de Successfully transitioned node
584dac5cc70d8682f71c4675a843c309 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_OPENED
2011-06-29 16:43:59,224 DEBUG
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Opened
gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
java.io.IOException: Got error in response to OP_READ_BLOCK self=/
10.1.104.2:33356, remote=/10.1.104.2:50010 for file
/hbase/gs_raw_events/584dac5cc70d8682f71c4675a843c309/events/1971818821800304360
for block 3674866614142268536_674205


Ted, can you please point me to J-D's bug fix you mentioned? Are you
positive it's the same scenario - data loss is a very serious problem for a
DB.
I'd really like to apply that patch ASAP, because when I run hbck I get over
400 regions which are multiply assigned.
Last question, I understand the region's data is lost but is there a way to
at least make the table consistent again by some how removing the lost
region?

Thanks.

-eran



On Sat, Jul 2, 2011 at 01:46, Ted Yu <yuzhihong@gmail.com> wrote:

> >> 2011-06-29 16:43:57,880 INFO
> org.apache.hadoop.hbase.
> master.AssignmentManager: Region has been
> PENDING_OPEN for too long, reassigning
>
> region=gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
>
> The double assignment should have been fixed by J-D's recent checkin.
>
> On Fri, Jul 1, 2011 at 3:14 PM, Stack <stack@duboce.net> wrote:
>
> > Is
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > the region that was having the issue?  If so, if you looked in
> > hadoop1-s05's logs, was this region opened around 2011-06-29 16:43:57?
> >  Was it also opened hadoop1-s02 not long after?  Did you say what
> > version of hbase you are on?
> >
> > St.Ack
> >
> > On Fri, Jul 1, 2011 at 5:08 AM, Eran Kutner <eran@gigya.com> wrote:
> > > Hi Stack,
> > > I'm not sure what the log means. I do see references to two different
> > > servers, but that would probably happen if there was normal transition
> I
> > > assume. I'm using version 0.90.3
> > > Here are the relevant lines from the master logs:
> > >
> > > 2011-06-19 21:39:37,164 INFO
> > org.apache.hadoop.hbase.master.ServerManager:
> > > Received REGION_SPLIT:
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533691659.9000a5d8df9502efc90d2c23567e4658.:
> > > Daughters;
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.,
> > >
> >
> gs_raw_events,GSLoad_1308518810_1249_WEB204,1308533970928.46f876a4e97be04edb35eb8f8959d482.
> > > from hadoop1-s05.farm-ny.gigya.com,60020,1307349217076
> > > 2011-06-19 21:43:12,983 INFO
> org.apache.hadoop.hbase.catalog.MetaEditor:
> > > Deleted daughter reference
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.,
> > > qualifier=splitA, from parent
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533691659.9000a5d8df9502efc90d2c23567e4658.
> > > 2011-06-29 16:29:36,143 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Starting unassignment
> > of
> > > region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > (offlining)
> > > 2011-06-29 16:29:36,146 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Sent CLOSE to
> > serverName=
> > > hadoop1-s05.farm-ny.gigya.com,60020,1307349217076, load=(requests=0,
> > > regions=1654, usedHeap=1870, maxHeap=12483) for region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > 2011-06-29 16:29:38,327 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Handling new
> unassigned
> > > node: /hbase/unassigned/584dac5cc70d8682f71c4675a843c309
> > >
> >
> (region=gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.,
> > > server=hadoop1-s05.farm-ny.gigya.com,60020,1307349217076,
> > > state=RS_ZK_REGION_CLOSED)
> > > 2011-06-29 16:29:38,327 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Handling
> > > transition=RS_ZK_REGION_CLOSED,
> > > server=hadoop1-s05.farm-ny.gigya.com,60020,1307349217076,
> > > region=584dac5cc70d8682f71c4675a843c309
> > > 2011-06-29 16:30:53,742 DEBUG
> > > org.apache.hadoop.hbase.master.handler.ClosedRegionHandler: Handling
> > CLOSED
> > > event for 584dac5cc70d8682f71c4675a843c309
> > > 2011-06-29 16:30:53,742 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Table being disabled
> so
> > > deleting ZK node and removing from regions in transition, skipping
> > > assignment of region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > 2011-06-29 16:30:53,742 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > > master:60000-0x13004a31d7804c4 Deleting existing unassigned node for
> > > 584dac5cc70d8682f71c4675a843c309 that is in expected state
> > > RS_ZK_REGION_CLOSED
> > > 2011-06-29 16:30:53,801 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > > master:60000-0x13004a31d7804c4 Successfully deleted unassigned node for
> > > region 584dac5cc70d8682f71c4675a843c309 in expected state
> > > RS_ZK_REGION_CLOSED
> > > 2011-06-29 16:34:01,453 INFO
> org.apache.hadoop.hbase.catalog.MetaEditor:
> > > Updated region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > in META
> > > 2011-06-29 16:37:12,247 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > > master:60000-0x13004a31d7804c4 Creating (or updating) unassigned node
> for
> > > 584dac5cc70d8682f71c4675a843c309 with OFFLINE state
> > > 2011-06-29 16:37:12,576 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: No previous
> transition
> > > plan was found (or we are ignoring an existing plan) for
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > so generated a random one;
> > >
> >
> hri=gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.,
> > > src=, dest=hadoop1-s05.farm-ny.gigya.com,60020,1307349217076; 5
> > (online=5,
> > > exclude=null) available servers
> > > 2011-06-29 16:37:12,576 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Assigning region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > to hadoop1-s05.farm-ny.gigya.com,60020,1307349217076
> > > 2011-06-29 16:37:13,102 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Handling
> > > transition=RS_ZK_REGION_OPENED,
> > > server=hadoop1-s05.farm-ny.gigya.com,60020,1307349217076,
> > > region=584dac5cc70d8682f71c4675a843c309
> > > 2011-06-29 16:39:54,075 DEBUG
> > > org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Handling
> > OPENED
> > > event for 584dac5cc70d8682f71c4675a843c309; deleting unassigned node
> > > 2011-06-29 16:39:54,075 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > > master:60000-0x13004a31d7804c4 Deleting existing unassigned node for
> > > 584dac5cc70d8682f71c4675a843c309 that is in expected state
> > > RS_ZK_REGION_OPENED
> > > 2011-06-29 16:39:54,192 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > > master:60000-0x13004a31d7804c4 Successfully deleted unassigned node for
> > > region 584dac5cc70d8682f71c4675a843c309 in expected state
> > > RS_ZK_REGION_OPENED
> > > 2011-06-29 16:39:54,326 DEBUG
> > > org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Opened
> region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > on hadoop1-s05.farm-ny.gigya.com,60020,1307349217076
> > > 2011-06-29 16:40:00,598 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > > master:60000-0x13004a31d7804c4 Creating (or updating) unassigned node
> for
> > > 584dac5cc70d8682f71c4675a843c309 with OFFLINE state
> > > 2011-06-29 16:40:00,877 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: No previous
> transition
> > > plan was found (or we are ignoring an existing plan) for
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > so generated a random one;
> > >
> >
> hri=gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.,
> > > src=, dest=hadoop1-s05.farm-ny.gigya.com,60020,1307349217076; 5
> > (online=5,
> > > exclude=null) available servers
> > > 2011-06-29 16:40:00,877 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Assigning region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > to hadoop1-s05.farm-ny.gigya.com,60020,1307349217076
> > > 2011-06-29 16:43:57,879 INFO
> > > org.apache.hadoop.hbase.master.AssignmentManager: Regions in transition
> > > timed out:
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > state=PENDING_OPEN, ts=1309380052723
> > > 2011-06-29 16:43:57,880 INFO
> > > org.apache.hadoop.hbase.master.AssignmentManager: Region has been
> > > PENDING_OPEN for too long, reassigning
> > >
> >
> region=gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > 2011-06-29 16:43:57,936 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Forcing OFFLINE;
> > >
> >
> was=gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > state=PENDING_OPEN, ts=1309380052723
> > > 2011-06-29 16:43:57,936 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: No previous
> transition
> > > plan was found (or we are ignoring an existing plan) for
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > so generated a random one;
> > >
> >
> hri=gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.,
> > > src=, dest=hadoop1-s02.farm-ny.gigya.com,60020,1306919627544; 5
> > (online=5,
> > > exclude=null) available servers
> > > 2011-06-29 16:43:57,936 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Assigning region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > to hadoop1-s02.farm-ny.gigya.com,60020,1306919627544
> > > 2011-06-29 16:43:59,022 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Handling
> > > transition=RS_ZK_REGION_OPENING,
> > > server=hadoop1-s02.farm-ny.gigya.com,60020,1306919627544,
> > > region=584dac5cc70d8682f71c4675a843c309
> > > 2011-06-29 16:43:59,221 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Handling
> > > transition=RS_ZK_REGION_OPENING,
> > > server=hadoop1-s02.farm-ny.gigya.com,60020,1306919627544,
> > > region=584dac5cc70d8682f71c4675a843c309
> > > 2011-06-29 16:43:59,226 DEBUG
> > > org.apache.hadoop.hbase.master.AssignmentManager: Handling
> > > transition=RS_ZK_REGION_OPENED,
> > > server=hadoop1-s02.farm-ny.gigya.com,60020,1306919627544,
> > > region=584dac5cc70d8682f71c4675a843c309
> > > 2011-06-29 16:43:59,274 DEBUG
> > > org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Handling
> > OPENED
> > > event for 584dac5cc70d8682f71c4675a843c309; deleting unassigned node
> > > 2011-06-29 16:43:59,274 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > > master:60000-0x13004a31d7804c4 Deleting existing unassigned node for
> > > 584dac5cc70d8682f71c4675a843c309 that is in expected state
> > > RS_ZK_REGION_OPENED
> > > 2011-06-29 16:43:59,296 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZKAssign:
> > > master:60000-0x13004a31d7804c4 Successfully deleted unassigned node for
> > > region 584dac5cc70d8682f71c4675a843c309 in expected state
> > > RS_ZK_REGION_OPENED
> > > 2011-06-29 16:43:59,375 WARN
> > > org.apache.hadoop.hbase.master.AssignmentManager: Overwriting
> > > 584dac5cc70d8682f71c4675a843c309 on
> > > serverName=hadoop1-s05.farm-ny.gigya.com,60020,1307349217076,
> > > load=(requests=0, regions=1273, usedHeap=2676, maxHeap=12483)
> > > 2011-06-29 16:43:59,375 DEBUG
> > > org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Opened
> region
> > >
> >
> gs_raw_events,GSLoad_1308518553_168_WEB204,1308533970928.584dac5cc70d8682f71c4675a843c309.
> > > on hadoop1-s02.farm-ny.gigya.com,60020,1306919627544
> > >
> > > Thanks.
> > >
> > > -eran
> > >
> > >
> > >
> > > On Fri, Jul 1, 2011 at 09:05, Stack <stack@duboce.net> wrote:
> > >
> > >> So, Eran, it seems as though two RegionServers were carrying the
> > >> region?  One deleted a file (compaction on its side)?  Can you figure
> > >> if indeed two servers had same region?  (Check master logs for this
> > >> regions assignments).
> > >>
> > >> What version of hbase?
> > >>
> > >> St.Ack
> > >>
> > >>
> > >> On Thu, Jun 30, 2011 at 3:58 AM, Eran Kutner <eran@gigya.com> wrote:
> > >> > Hi,
> > >> > I have a cluster of 5 nodes with one large table that currently has
> > >> around
> > >> > 12000 regions. Everything was working fine for relatively long time,
> > >> until
> > >> > now.
> > >> > Yesterday I significantly reduced the TTL on the table and initiated
> > >> major
> > >> > compaction. This should have reduced the table size to about 20% of
> > its
> > >> > original size.
> > >> > Today, I'm getting errors of inaccessible files on HDFS, for
> example:
> > >> > java.io.IOException: Got error in response to OP_READ_BLOCK self=/
> > >> > 10.1.104.2:58047, remote=/10.1.104.2:50010 for file
> > >> >
> > >>
> >
> /hbase/gs_raw_events/584dac5cc70d8682f71c4675a843c309/events/1971818821800304360
> > >> > for block 3674866614142268536_674205
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hdfs.DFSClient$BlockReader.newBlockReader(DFSClient.java:1487)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1811)
> > >> >        at
> > >> >
> > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1948)
> > >> >        at java.io.DataInputStream.read(DataInputStream.java:132)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.io.hfile.BoundedRangeFileInputStream.read(BoundedRangeFileInputStream.java:105)
> > >> >        at
> > java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
> > >> >        at
> > java.io.BufferedInputStream.read(BufferedInputStream.java:237)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.io.compress.BlockDecompressorStream.rawReadInt(BlockDecompressorStream.java:128)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.io.compress.BlockDecompressorStream.decompress(BlockDecompressorStream.java:68)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:75)
> > >> >        at
> > java.io.BufferedInputStream.read1(BufferedInputStream.java:256)
> > >> >        at
> > java.io.BufferedInputStream.read(BufferedInputStream.java:317)
> > >> >        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:102)
> > >> >        at
> > >> >
> > org.apache.hadoop.hbase.io.hfile.HFile$Reader.decompress(HFile.java:1094)
> > >> >        at
> > >> >
> > org.apache.hadoop.hbase.io.hfile.HFile$Reader.readBlock(HFile.java:1036)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.seekTo(HFile.java:1433)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:139)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:96)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:77)
> > >> >        at
> > >> >
> org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:1341)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.<init>(HRegion.java:2269)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateInternalScanner(HRegion.java:1126)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1118)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1102)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:1781)
> > >> >        at sun.reflect.GeneratedMethodAccessor46.invoke(Unknown
> Source)
> > >> >        at
> > >> >
> > >>
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> > >> >        at java.lang.reflect.Method.invoke(Method.java:597)
> > >> >        at
> > >> > org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570)
> > >> >        at
> > >> >
> > >>
> >
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1039)
> > >> >
> > >> > I checked and the file, indeed doesn't exist on HDFS, here is the
> name
> > >> node
> > >> > logs for this block, apparently because it was deleted:
> > >> > 2011-06-19 21:39:36,651 INFO org.apache.hadoop.hdfs.StateChange:
> > BLOCK*
> > >> > NameSystem.allocateBlock:
> > >> >
> > >>
> >
> /hbase/gs_raw_events/584dac5cc70d8682f71c4675a843c309/.tmp/2096863423111131624.
> > >> > blk_3674866614142268536_674205
> > >> > 2011-06-19 21:40:11,954 INFO org.apache.hadoop.hdfs.StateChange:
> > BLOCK*
> > >> > NameSystem.addStoredBlock: blockMap updated: 10.1.104.2:50010 is
> > added
> > >> to
> > >> > blk_3674866614142268536_674205 size 67108864
> > >> > 2011-06-19 21:40:11,954 INFO org.apache.hadoop.hdfs.StateChange:
> > BLOCK*
> > >> > NameSystem.addStoredBlock: blockMap updated: 10.1.104.3:50010 is
> > added
> > >> to
> > >> > blk_3674866614142268536_674205 size 67108864
> > >> > 2011-06-19 21:40:11,955 INFO org.apache.hadoop.hdfs.StateChange:
> > BLOCK*
> > >> > NameSystem.addStoredBlock: blockMap updated: 10.1.104.5:50010 is
> > added
> > >> to
> > >> > blk_3674866614142268536_674205 size 67108864
> > >> > 2011-06-29 20:20:01,662 INFO org.apache.hadoop.hdfs.StateChange:
> > BLOCK*
> > >> ask
> > >> > 10.1.104.2:50010 to delete  blk_3674866614142268536_674205
> > >> > 2011-06-29 20:20:13,671 INFO org.apache.hadoop.hdfs.StateChange:
> > BLOCK*
> > >> ask
> > >> > 10.1.104.5:50010 to delete  blk_-4056387895369608597_675174
> > >> > blk_-5017882805850873821_672281 blk_702373987100607684_672288
> > >> > blk_-5357157478043290010_668506 blk_7118175133735412789_674903
> > >> > blk_-3569812563715986384_675231 blk_8296855057240604851_669285
> > >> > blk_-6483679172530609101_674268 blk_8738539715363739108_673682
> > >> > blk_1744841904626813502_675238 blk_-6035315106100051103_674266
> > >> > blk_-1789501623010070237_674908 blk_1944054629336265129_673689
> > >> > blk_3674866614142268536_674205 blk_7930425446738143892_647410
> > >> > blk_-3007186753042268449_669296 blk_-5482302621772778061_647416
> > >> > blk_-3765735404924932181_672004 blk_7476090998956811081_675169
> > >> > blk_7862291659285127712_646890 blk_-2666244746343584727_672013
> > >> > blk_6039172613960915602_674206 blk_-8470884397893086564_646899
> > >> > blk_4558230221166712802_668510
> > >> > 2011-06-29 20:20:46,698 INFO org.apache.hadoop.hdfs.StateChange:
> > BLOCK*
> > >> ask
> > >> > 10.1.104.3:50010 to delete  blk_-7851606440036350812_671552
> > >> > blk_9214649160203453845_647566 blk_702373987100607684_672288
> > >> > blk_5958099369749234073_668143 blk_-5172218034084903173_673109
> > >> > blk_-2934555181472719276_646476 blk_-1409986679370073931_672552
> > >> > blk_-2786034325506235869_669086 blk_3674866614142268536_674205
> > >> > blk_510158930393283118_673225 blk_916244738216205237_677068
> > >> > blk_-4317027806407316617_670379 blk_8555705688850972639_673485
> > >> > blk_-3765735404924932181_672004 blk_-5482302621772778061_647416
> > >> > blk_-2461801145731752623_674605 blk_-8737702908048998927_672549
> > >> > blk_-8470884397893086564_646899 blk_4558230221166712802_668510
> > >> > blk_-4056387895369608597_675174 blk_-8675430610673886073_647695
> > >> > blk_-6642870230256028318_668211 blk_-3890408516362176771_677483
> > >> > blk_-3569812563715986384_675231 blk_-5007142629771321873_674548
> > >> > blk_-3345355191863431669_667066 blk_8296855057240604851_669285
> > >> > blk_-6595462308187757470_672420 blk_-2583945228783203947_674607
> > >> > blk_-346988625120916345_677063 blk_4449525876338684218_674496
> > >> > blk_2617172363857549730_668201 blk_8738539715363739108_673682
> > >> > blk_-208904675456598428_679286 blk_-497549341281882641_646477
> > >> > blk_-6035315106100051103_674266 blk_-2356539038067297411_672388
> > >> > blk_-3881703084497103249_668137 blk_2214397881104950315_646643
> > >> > blk_-5907671443455357710_673223 blk_-2431880309956605679_669204
> > >> > blk_6039172613960915602_674206 blk_5053643911633142711_669194
> > >> > blk_-2636977729205236686_674664
> > >> >
> > >> > I assume the file loss is somehow related to this change and the
> major
> > >> > compaction that followed because the same scan that is failing now
> was
> > >> > working fine yesterday and that is the only changed that happened
on
> > the
> > >> > cluster. Any suggestions what to do now?
> > >> >
> > >> > Thanks.
> > >> >
> > >> > -eran
> > >> >
> > >>
> > >
> >
>

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