Hi,

I have 2 regions transitionning from servers to servers for 15 minutes now.

I have nothing in the master logs about those 2 regions but on the region
server logs I have some files notfound2013-02-23 16:02:07,347 ERROR
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Failed open
of region=entry,theykey,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
starting to roll back the global memstore size.
java.io.IOException: java.io.IOException: java.io.FileNotFoundException:
File does not exist:
/hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
    at
org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionInternals(HRegion.java:597)
    at
org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:510)
    at
org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4177)
    at
org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4125)
    at
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:328)
    at
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:100)
    at
org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)
    at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
Caused by: java.io.IOException: java.io.FileNotFoundException: File does
not exist:
/hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
    at
org.apache.hadoop.hbase.regionserver.Store.loadStoreFiles(Store.java:433)
    at org.apache.hadoop.hbase.regionserver.Store.<init>(Store.java:240)
    at
org.apache.hadoop.hbase.regionserver.HRegion.instantiateHStore(HRegion.java:3141)
    at org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion.java:572)
    at org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion.java:570)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    ... 3 more
Caused by: java.io.FileNotFoundException: File does not exist:
/hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
    at
org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1843)
    at
org.apache.hadoop.hdfs.DFSClient$DFSInputStream.<init>(DFSClient.java:1834)
    at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:578)
    at
org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:154)
    at org.apache.hadoop.fs.FilterFileSystem.open(FilterFileSystem.java:108)
    at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:427)
    at
org.apache.hadoop.hbase.io.hfile.HFile.createReaderWithEncoding(HFile.java:573)
    at
org.apache.hadoop.hbase.regionserver.StoreFile$Reader.<init>(StoreFile.java:1261)
    at
org.apache.hadoop.hbase.io.HalfStoreFileReader.<init>(HalfStoreFileReader.java:70)
    at
org.apache.hadoop.hbase.regionserver.StoreFile.open(StoreFile.java:508)
    at
org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:603)
    at org.apache.hadoop.hbase.regionserver.Store$1.call(Store.java:409)
    at org.apache.hadoop.hbase.regionserver.Store$1.call(Store.java:404)
    ... 8 more
2013-02-23 16:02:07,370 WARN org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x13d07ec012501fc Attempt to transition the unassigned
node for 6dd77bc9ff91e0e6d413f74e670ab435 from RS_ZK_REGION_OPENING to
RS_ZK_REGION_FAILED_OPEN failed, the node existed but was version 6586 not
the expected version 6585
If I try hbck -fix, this is bringing the master down:
2013-02-23 16:03:01,419 INFO org.apache.hadoop.hbase.master.HMaster:
BalanceSwitch=false
2013-02-23 16:03:03,067 FATAL org.apache.hadoop.hbase.master.HMaster:
Master server abort: loaded coprocessors are: []
2013-02-23 16:03:03,068 FATAL org.apache.hadoop.hbase.master.HMaster:
Unexpected state :
entry,thekey,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.
state=PENDING_OPEN, ts=1361653383067, server=node2,60020,1361653023303 ..
Cannot transit it to OFFLINE.
java.lang.IllegalStateException: Unexpected state :
entry,thekey,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.
state=PENDING_OPEN, ts=1361653383067, server=node2,60020,1361653023303 ..
Cannot transit it to OFFLINE.
    at
org.apache.hadoop.hbase.master.AssignmentManager.setOfflineInZooKeeper(AssignmentManager.java:1813)
    at
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1658)
    at
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1423)
    at
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1398)
    at
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1393)
    at
org.apache.hadoop.hbase.master.HMaster.assignRegion(HMaster.java:1740)
    at org.apache.hadoop.hbase.master.HMaster.assign(HMaster.java:1731)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at
org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:320)
    at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1426)
2013-02-23 16:03:03,069 INFO org.apache.hadoop.hbase.master.HMaster:
Aborting
2013-02-23 16:03:03,069 INFO org.apache.hadoop.ipc.HBaseServer: Stopping
server on 60000
2013-02-23 16:03:03,069 INFO org.apache.hadoop.hbase.master.CatalogJanitor:
node3,60000,1361

JM,

  How are you doing today?  Right before the file does not exist should be
another path.  Can you let me know if in that path there are a pointers
from a split to 2ebfef593a3d715b59b85670909182c9?  The directory may
already exist.  I have seen this a couple times now and am trying to ferret
out a root cause to open a JIRA with.  I suspect we have a split code bug
in .92+

On Sat, Feb 23, 2013 at 4:10 PM, Jean-Marc Spaggiari <
[EMAIL PROTECTED]> wrote:

> Hi,
>
> I have 2 regions transitionning from servers to servers for 15 minutes now.
>
> I have nothing in the master logs about those 2 regions but on the region
> server logs I have some files notfound2013-02-23 16:02:07,347 ERROR
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Failed open
> of region=entry,theykey,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
> starting to roll back the global memstore size.
> java.io.IOException: java.io.IOException: java.io.FileNotFoundException:
> File does not exist:
>
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
>     at
>
> org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionInternals(HRegion.java:597)
>     at
> org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:510)
>     at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4177)
>     at
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4125)
>     at
>
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:328)
>     at
>
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:100)
>     at
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)
>     at
>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>     at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>     at java.lang.Thread.run(Thread.java:722)
> Caused by: java.io.IOException: java.io.FileNotFoundException: File does
> not exist:
>
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
>     at
> org.apache.hadoop.hbase.regionserver.Store.loadStoreFiles(Store.java:433)
>     at org.apache.hadoop.hbase.regionserver.Store.<init>(Store.java:240)
>     at
>
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateHStore(HRegion.java:3141)
>     at
> org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion.java:572)
>     at
> org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion.java:570)
>     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
>     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
>     at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
>     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
>     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
>     ... 3 more
> Caused by: java.io.FileNotFoundException: File does not exist:
>
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
>     at
>
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1843)
>     at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.<init>(DFSClient.java:1834)
>     at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:578)
>     at
>
> org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:154)
>     at
> org.apache.hadoop.fs.FilterFileSystem.open(FilterFileSystem.java:108)
>     at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:427)
>     at
>
> org.apache.hadoop.hbase.io.hfile.HFile.createReaderWithEncoding(HFile.java:573)
>     at
>
> org.apache.hadoop.hbase.regionserver.StoreFile$Reader.<init>(StoreFile.java:1261)
>     at
>
> org.apache.hadoop.hbase.io.HalfStoreFileReader.<init>(HalfStoreFileReader.java:70)
>     at
> org.apache.hadoop.hbase.regionserver.StoreFile.open(StoreFile.java:508)
>     at
>
> org.apache.hadoop.hbase.regionserver.StoreFile.createReader(StoreFile.java:603)

Kevin O'Dell
Customer Operations Engineer, Cloudera

Hi Kevin,

Thanks for taking the time to reply.

Here is a bigger extract of the logs. I don't see another path in the logs.

http://pastebin.com/uMxGyjKm

I can send you the entire log if you want (42Mo)

What I did is I merged many regions together, then altered the table to set
the max_filesize and started a major_compaction to get the table splitted.

To fix the issue I had to drop one working table, and ran -repair multiple
times. Now it's fixed, but I still have the logs.

I'm redoing all the steps I did. Many I will face the issue again. If I'm
able to reproduce, we might be able to figure where the issue is...

JM

2013/2/23 Kevin O'dell <[EMAIL PROTECTED]>

> JM,
>
>   How are you doing today?  Right before the file does not exist should be
> another path.  Can you let me know if in that path there are a pointers
> from a split to 2ebfef593a3d715b59b85670909182c9?  The directory may
> already exist.  I have seen this a couple times now and am trying to ferret
> out a root cause to open a JIRA with.  I suspect we have a split code bug
> in .92+
>
> On Sat, Feb 23, 2013 at 4:10 PM, Jean-Marc Spaggiari <
> [EMAIL PROTECTED]> wrote:
>
> > Hi,
> >
> > I have 2 regions transitionning from servers to servers for 15 minutes
> now.
> >
> > I have nothing in the master logs about those 2 regions but on the region
> > server logs I have some files notfound2013-02-23 16:02:07,347 ERROR
> > org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Failed
> open
> > of region=entry,theykey,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
> > starting to roll back the global memstore size.
> > java.io.IOException: java.io.IOException: java.io.FileNotFoundException:
> > File does not exist:
> >
> >
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
> >     at
> >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionInternals(HRegion.java:597)
> >     at
> > org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:510)
> >     at
> >
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4177)
> >     at
> >
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4125)
> >     at
> >
> >
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:328)
> >     at
> >
> >
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:100)
> >     at
> > org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)
> >     at
> >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> >     at
> >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> >     at java.lang.Thread.run(Thread.java:722)
> > Caused by: java.io.IOException: java.io.FileNotFoundException: File does
> > not exist:
> >
> >
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
> >     at
> > org.apache.hadoop.hbase.regionserver.Store.loadStoreFiles(Store.java:433)
> >     at org.apache.hadoop.hbase.regionserver.Store.<init>(Store.java:240)
> >     at
> >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateHStore(HRegion.java:3141)
> >     at
> > org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion.java:572)
> >     at
> > org.apache.hadoop.hbase.regionserver.HRegion$1.call(HRegion.java:570)
> >     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> >     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> >     at
> > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> >     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> >     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> >     ... 3 more
> > Caused by: java.io.FileNotFoundException: File does not exist:
> >
> >
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
> >     at
> >
> >
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1843)

JM,

  Here is what I am seeing:

2013-02-23 15:46:14,630 ERROR
org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Failed open
of
region=entry,ac.adanac-oidar.www\x1Fhttp\x1F-1\x1F/sports/patinage/2012/04/04/001-artistique-trophee-mondial.shtml\x1Fnull,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
starting to roll back the global memstore size.

If you checked 6dd77bc9ff91e0e6d413f74e670ab435 you should have seen some
pointer files to 2ebfef593a3d715b59b85670909182c9.  Typically, you would
see the storefiles in 6dd77bc9ff91e0e6d413f74e670ab435 and
2ebfef593a3d715b59b85670909182c9
would have been empty from a bad split.  What I do is to delete the
pointers that don't reference any storefiles.  Then you can clear the
unassigned folder in zkCli.  Finally, run an unassign on the RITs.  This
way there is no down time and you don't have to drop any tables.
On Sat, Feb 23, 2013 at 6:14 PM, Jean-Marc Spaggiari <
[EMAIL PROTECTED]> wrote:

> Hi Kevin,
>
> Thanks for taking the time to reply.
>
> Here is a bigger extract of the logs. I don't see another path in the logs.
>
> http://pastebin.com/uMxGyjKm
>
> I can send you the entire log if you want (42Mo)
>
> What I did is I merged many regions together, then altered the table to set
> the max_filesize and started a major_compaction to get the table splitted.
>
> To fix the issue I had to drop one working table, and ran -repair multiple
> times. Now it's fixed, but I still have the logs.
>
> I'm redoing all the steps I did. Many I will face the issue again. If I'm
> able to reproduce, we might be able to figure where the issue is...
>
> JM
>
> 2013/2/23 Kevin O'dell <[EMAIL PROTECTED]>
>
> > JM,
> >
> >   How are you doing today?  Right before the file does not exist should
> be
> > another path.  Can you let me know if in that path there are a pointers
> > from a split to 2ebfef593a3d715b59b85670909182c9?  The directory may
> > already exist.  I have seen this a couple times now and am trying to
> ferret
> > out a root cause to open a JIRA with.  I suspect we have a split code bug
> > in .92+
> >
> > On Sat, Feb 23, 2013 at 4:10 PM, Jean-Marc Spaggiari <
> > [EMAIL PROTECTED]> wrote:
> >
> > > Hi,
> > >
> > > I have 2 regions transitionning from servers to servers for 15 minutes
> > now.
> > >
> > > I have nothing in the master logs about those 2 regions but on the
> region
> > > server logs I have some files notfound2013-02-23 16:02:07,347 ERROR
> > > org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Failed
> > open
> > > of
> region=entry,theykey,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
> > > starting to roll back the global memstore size.
> > > java.io.IOException: java.io.IOException:
> java.io.FileNotFoundException:
> > > File does not exist:
> > >
> > >
> >
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
> > >     at
> > >
> > >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionInternals(HRegion.java:597)
> > >     at
> > >
> org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:510)
> > >     at
> > >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4177)
> > >     at
> > >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4125)
> > >     at
> > >
> > >
> >
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:328)
> > >     at
> > >
> > >
> >
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:100)
> > >     at
> > >
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:169)
> > >     at
> > >
> > >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> > >     at
> > >
> > >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> > >     at java.lang.Thread.run(Thread.java:722)
> > > Caused by: java.io.IOException: java.io.FileNotFoundException: File

Kevin O'Dell
Customer Operations Engineer, Cloudera

Hi Kevin,

I stopped HBase to merge some regions so I already had to deal with the
downtime. But with the online merge coming it's very good to know the
online way to do it.

Now, is there an automated way to do it? In HBCK? Maybe we can check each
region if there is links, check that those links exist, and if not, we
remove them? Or it will be to risky?

JM

2013/2/23 Kevin O'dell <[EMAIL PROTECTED]>

> JM,
>
>   Here is what I am seeing:
>
> 2013-02-23 15:46:14,630 ERROR
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Failed open
> of
>
> region=entry,ac.adanac-oidar.www\x1Fhttp\x1F-1\x1F/sports/patinage/2012/04/04/001-artistique-trophee-mondial.shtml\x1Fnull,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
> starting to roll back the global memstore size.
>
> If you checked 6dd77bc9ff91e0e6d413f74e670ab435 you should have seen some
> pointer files to 2ebfef593a3d715b59b85670909182c9.  Typically, you would
> see the storefiles in 6dd77bc9ff91e0e6d413f74e670ab435 and
> 2ebfef593a3d715b59b85670909182c9
> would have been empty from a bad split.  What I do is to delete the
> pointers that don't reference any storefiles.  Then you can clear the
> unassigned folder in zkCli.  Finally, run an unassign on the RITs.  This
> way there is no down time and you don't have to drop any tables.
>
>
> On Sat, Feb 23, 2013 at 6:14 PM, Jean-Marc Spaggiari <
> [EMAIL PROTECTED]> wrote:
>
> > Hi Kevin,
> >
> > Thanks for taking the time to reply.
> >
> > Here is a bigger extract of the logs. I don't see another path in the
> logs.
> >
> > http://pastebin.com/uMxGyjKm
> >
> > I can send you the entire log if you want (42Mo)
> >
> > What I did is I merged many regions together, then altered the table to
> set
> > the max_filesize and started a major_compaction to get the table
> splitted.
> >
> > To fix the issue I had to drop one working table, and ran -repair
> multiple
> > times. Now it's fixed, but I still have the logs.
> >
> > I'm redoing all the steps I did. Many I will face the issue again. If I'm
> > able to reproduce, we might be able to figure where the issue is...
> >
> > JM
> >
> > 2013/2/23 Kevin O'dell <[EMAIL PROTECTED]>
> >
> > > JM,
> > >
> > >   How are you doing today?  Right before the file does not exist should
> > be
> > > another path.  Can you let me know if in that path there are a pointers
> > > from a split to 2ebfef593a3d715b59b85670909182c9?  The directory may
> > > already exist.  I have seen this a couple times now and am trying to
> > ferret
> > > out a root cause to open a JIRA with.  I suspect we have a split code
> bug
> > > in .92+
> > >
> > > On Sat, Feb 23, 2013 at 4:10 PM, Jean-Marc Spaggiari <
> > > [EMAIL PROTECTED]> wrote:
> > >
> > > > Hi,
> > > >
> > > > I have 2 regions transitionning from servers to servers for 15
> minutes
> > > now.
> > > >
> > > > I have nothing in the master logs about those 2 regions but on the
> > region
> > > > server logs I have some files notfound2013-02-23 16:02:07,347 ERROR
> > > > org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler:
> Failed
> > > open
> > > > of
> > region=entry,theykey,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
> > > > starting to roll back the global memstore size.
> > > > java.io.IOException: java.io.IOException:
> > java.io.FileNotFoundException:
> > > > File does not exist:
> > > >
> > > >
> > >
> >
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
> > > >     at
> > > >
> > > >
> > >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionInternals(HRegion.java:597)
> > > >     at
> > > >
> > org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:510)
> > > >     at
> > > >
> > >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4177)
> > > >     at
> > > >
> > >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:4125)
> > > >     at
> > > >
> > > >
> > >
> >
> org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:328)

+Dev

I think number 1 we fix what ever is leaving regions in this state.  I
think we could put logic into hbck for this.

On Sat, Feb 23, 2013 at 7:36 PM, Jean-Marc Spaggiari <
[EMAIL PROTECTED]> wrote:

> Hi Kevin,
>
> I stopped HBase to merge some regions so I already had to deal with the
> downtime. But with the online merge coming it's very good to know the
> online way to do it.
>
> Now, is there an automated way to do it? In HBCK? Maybe we can check each
> region if there is links, check that those links exist, and if not, we
> remove them? Or it will be to risky?
>
> JM
>
>
>
>
>
> 2013/2/23 Kevin O'dell <[EMAIL PROTECTED]>
>
> > JM,
> >
> >   Here is what I am seeing:
> >
> > 2013-02-23 15:46:14,630 ERROR
> > org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Failed
> open
> > of
> >
> >
> region=entry,ac.adanac-oidar.www\x1Fhttp\x1F-1\x1F/sports/patinage/2012/04/04/001-artistique-trophee-mondial.shtml\x1Fnull,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
> > starting to roll back the global memstore size.
> >
> > If you checked 6dd77bc9ff91e0e6d413f74e670ab435 you should have seen some
> > pointer files to 2ebfef593a3d715b59b85670909182c9.  Typically, you would
> > see the storefiles in 6dd77bc9ff91e0e6d413f74e670ab435 and
> > 2ebfef593a3d715b59b85670909182c9
> > would have been empty from a bad split.  What I do is to delete the
> > pointers that don't reference any storefiles.  Then you can clear the
> > unassigned folder in zkCli.  Finally, run an unassign on the RITs.  This
> > way there is no down time and you don't have to drop any tables.
> >
> >
> > On Sat, Feb 23, 2013 at 6:14 PM, Jean-Marc Spaggiari <
> > [EMAIL PROTECTED]> wrote:
> >
> > > Hi Kevin,
> > >
> > > Thanks for taking the time to reply.
> > >
> > > Here is a bigger extract of the logs. I don't see another path in the
> > logs.
> > >
> > > http://pastebin.com/uMxGyjKm
> > >
> > > I can send you the entire log if you want (42Mo)
> > >
> > > What I did is I merged many regions together, then altered the table to
> > set
> > > the max_filesize and started a major_compaction to get the table
> > splitted.
> > >
> > > To fix the issue I had to drop one working table, and ran -repair
> > multiple
> > > times. Now it's fixed, but I still have the logs.
> > >
> > > I'm redoing all the steps I did. Many I will face the issue again. If
> I'm
> > > able to reproduce, we might be able to figure where the issue is...
> > >
> > > JM
> > >
> > > 2013/2/23 Kevin O'dell <[EMAIL PROTECTED]>
> > >
> > > > JM,
> > > >
> > > >   How are you doing today?  Right before the file does not exist
> should
> > > be
> > > > another path.  Can you let me know if in that path there are a
> pointers
> > > > from a split to 2ebfef593a3d715b59b85670909182c9?  The directory may
> > > > already exist.  I have seen this a couple times now and am trying to
> > > ferret
> > > > out a root cause to open a JIRA with.  I suspect we have a split code
> > bug
> > > > in .92+
> > > >
> > > > On Sat, Feb 23, 2013 at 4:10 PM, Jean-Marc Spaggiari <
> > > > [EMAIL PROTECTED]> wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > I have 2 regions transitionning from servers to servers for 15
> > minutes
> > > > now.
> > > > >
> > > > > I have nothing in the master logs about those 2 regions but on the
> > > region
> > > > > server logs I have some files notfound2013-02-23 16:02:07,347 ERROR
> > > > > org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler:
> > Failed
> > > > open
> > > > > of
> > > region=entry,theykey,1361651769136.6dd77bc9ff91e0e6d413f74e670ab435.,
> > > > > starting to roll back the global memstore size.
> > > > > java.io.IOException: java.io.IOException:
> > > java.io.FileNotFoundException:
> > > > > File does not exist:
> > > > >
> > > > >
> > > >
> > >
> >
> /hbase/entry/2ebfef593a3d715b59b85670909182c9/a/62b0aae45d59408dbcfc513954efabc7
> > > > >     at
> > > > >
> > > > >
> > > >
> > >
> >
> org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionInternals(HRegion.java:597)

Kevin O'Dell
Customer Operations Engineer, Cloudera