HBase shell issues on Cygwin

[Ryan Lynch <rl...@veoh.com>]

Hello,

 

I am currently having trouble using the HBase shell on Cygwin on a
Windows box. It appears not to be grabbing the entire input.  Below is
an example session.

 

$ bin/hbase shell

Hbase Shell, 0.0.2 version.

Copyright (c) 2007 by udanax, licensed to Apache Software Foundation.

Type 'help;' for usage.

 

hql > help;

Syntax error : Type 'help;' for usage.

Message : Encountered "hep" at line 1, column 2.

hql >

 

As you can see its taking in my "help;" input and thinking I typed
"hep"!?  Any help would be appreciated.

 

Regards,

Ryan

RE: Regions Offline

[David Alves <dr...@criticalsoftware.com>]

Hi Brian

	I'm using hbase trunk (updated yesterday) and Hadoop 0.17 branch.

David

> -----Original Message-----
> From: Bryan Duxbury [mailto:bryan@rapleaf.com]
> Sent: Friday, April 18, 2008 1:41 AM
> To: hbase-user@hadoop.apache.org
> Subject: Re: Regions Offline
> 
> For starters, what version of HBase/Hadoop are you using? There was a
> pretty bad bug in 0.16 that would cause regions to go offline and all
> sorts of other unexpected behavior.
> -Bryan
> 
> On Apr 28, 2008, at 5:00 PM, David Alves wrote:
> 
> > Hi
> >
> > 	My system is quite simple:
> > 	- two (one quad core, one dual core) servers with 2GB mem and 150 GB
> > allocated to dfs.
> > 	- I use it to crawl multiple supports but mainly filesystems and
> > save the results onto hbase (not too many files < 100.000 but rows
> > can get
> > easily to 30 MB each)
> >
> > 	I constantly getting NullPointerExceptions (on the client caused by
> > NotServingRegionExceptions on regionserver) when creating tables or
> > RegionOfflineExceptions when doing puts or sometimes just time outs.
> > 	When started with hbase I developed in 'local' mode, I then migrated
> > to a small dev 2 servers cluster (weaker than production is now)
> > where I
> > tested the functionality, and it worked fine but, my bad, due to
> > pressing
> > scheduling I didn't do any real load tests, so the system is now
> > continuously going under in production. I've only been able to do a
> > full
> > crawl by resetting the cluster to one node and putting it in
> > 'local' mode.
> >
> > 	My question is what can cause regions to be offline in
> > regionservers?
> >
> > 	I ask so that I can investigate the matter further but having a
> > starting point.
> >
> > 	I'm willing to help anyway I can but I would really appreciate any
> > help and/or starting point and tools for my investigation.
> >
> >
> > Best Regards
> > David Alves
> >

Re: Regions Offline

[Bryan Duxbury <br...@rapleaf.com>]

For starters, what version of HBase/Hadoop are you using? There was a  
pretty bad bug in 0.16 that would cause regions to go offline and all  
sorts of other unexpected behavior.
-Bryan

On Apr 28, 2008, at 5:00 PM, David Alves wrote:

> Hi
>
> 	My system is quite simple:
> 	- two (one quad core, one dual core) servers with 2GB mem and 150 GB
> allocated to dfs.
> 	- I use it to crawl multiple supports but mainly filesystems and
> save the results onto hbase (not too many files < 100.000 but rows  
> can get
> easily to 30 MB each)
>
> 	I constantly getting NullPointerExceptions (on the client caused by
> NotServingRegionExceptions on regionserver) when creating tables or
> RegionOfflineExceptions when doing puts or sometimes just time outs.
> 	When started with hbase I developed in 'local' mode, I then migrated
> to a small dev 2 servers cluster (weaker than production is now)  
> where I
> tested the functionality, and it worked fine but, my bad, due to  
> pressing
> scheduling I didn't do any real load tests, so the system is now
> continuously going under in production. I've only been able to do a  
> full
> crawl by resetting the cluster to one node and putting it in  
> 'local' mode.
>
> 	My question is what can cause regions to be offline in
> regionservers?
>
> 	I ask so that I can investigate the matter further but having a
> starting point.
>
> 	I'm willing to help anyway I can but I would really appreciate any
> help and/or starting point and tools for my investigation.
>
>
> Best Regards
> David Alves
>

Re: Regions Offline

[stack <st...@duboce.net>]

David:

Attached is a hacked up tool that you can use to online your regions.

Put it into your hbase install at src/java/org/apache/hadoop/hbase.  
Compile.  Then you should be able to do something like "./bin/hbase 
org.apache.hadoop.hbase.HBaseTool" to see a usage message.  Pass the row 
name and whether you want it 'on' or 'off'.

St.Ack

Regions Offline

[David Alves <dr...@criticalsoftware.com>]

Hi

	My system is quite simple:
	- two (one quad core, one dual core) servers with 2GB mem and 150 GB
allocated to dfs.
	- I use it to crawl multiple supports but mainly filesystems and
save the results onto hbase (not too many files < 100.000 but rows can get
easily to 30 MB each)

	I constantly getting NullPointerExceptions (on the client caused by
NotServingRegionExceptions on regionserver) when creating tables or
RegionOfflineExceptions when doing puts or sometimes just time outs.
	When started with hbase I developed in 'local' mode, I then migrated
to a small dev 2 servers cluster (weaker than production is now) where I
tested the functionality, and it worked fine but, my bad, due to pressing
scheduling I didn't do any real load tests, so the system is now
continuously going under in production. I've only been able to do a full
crawl by resetting the cluster to one node and putting it in 'local' mode.

	My question is what can cause regions to be offline in
regionservers?

	I ask so that I can investigate the matter further but having a
starting point.

	I'm willing to help anyway I can but I would really appreciate any
help and/or starting point and tools for my investigation.


Best Regards
David Alves