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Posted to user@hbase.apache.org by Stuti Awasthi <st...@hcl.com> on 2011/08/25 11:49:34 UTC
Facing issues in rest webservice with Hbase using Ruby
Hi friends,
I am stuck with my development as I want my ruby client should interact with REST interface to connect to Hbase. To attain this I installed sishen-hbase-ruby gem and hbase-ruby gem on my Ubuntu box.
I tried to query a table present in Hbase using the following code but it is giving error.
Code snippet :
require 'rubygems'
require 'hbase'
client = HBase::Client.new("http://localhost:8080/") # this url is the default.
table = client.show_table('userstable') # show the meta info of table users
Error on Console :
/usr/local/lib/ruby/gems/1.9.1/gems/sishen-hbase-ruby-1.0/lib/hbase/operation/table_operation.rb:9:in `rescue in show_table': Table 'userstable' Not found (HBase::TableNotFoundError)
from /usr/local/lib/ruby/gems/1.9.1/gems/sishen-hbase-ruby-1.0/lib/hbase/operation/table_operation.rb:5:in `show_table'
from /home/hadoop/Hbase_Script/Test.rb:10:in `<main>'
Error in Hbase Rest server logs :
2011-08-25 15:10:56,701 DEBUG org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: Cached location for .META.,,1.1028785192 is localhost:36169
2011-08-25 15:10:56,728 DEBUG org.apache.hadoop.hbase.rest.RowResource: GET http://localhost:8080/api/userstable
2011-08-25 15:10:56,762 INFO org.apache.zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=180000 watcher=hconnection
2011-08-25 15:10:56,765 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server localhost/10.33.100.107:2181
2011-08-25 15:10:56,765 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to localhost/10.33.100.107:2181, initiating session
2011-08-25 15:10:56,778 INFO org.apache.zookeeper.ClientCnxn: Session establishment complete on server localhost/10.33.100.107:2181, sessionid = 0x131fc710262001f, negotiated timeout = 40000
2011-08-25 15:10:56,790 DEBUG org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: Lookedup root region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@1acee78; hsa=localhost:36169
2011-08-25 15:10:56,791 DEBUG org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: Cached location for .META.,,1.1028785192 is localhost:36169
2011-08-25 15:10:56,803 WARN org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: Encountered problems when prefetch META table:
org.apache.hadoop.hbase.TableNotFoundException: Cannot find row in .META. for table: api, row=api,,99999999999999
at org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:136)
at org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:95)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.prefetchRegionCache(HConnectionManager.java:648)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:702)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:593)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:558)
at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:172)
........................
2011-08-25 15:10:56,807 ERROR org.mortbay.log: /api/userstable
java.lang.RuntimeException: org.apache.hadoop.hbase.TableNotFoundException: api
at org.apache.hadoop.hbase.client.HTableFactory.createHTableInterface(HTableFactory.java:38)
at org.apache.hadoop.hbase.client.HTablePool.createHTable(HTablePool.java:133)
at org.apache.hadoop.hbase.client.HTablePool.getTable(HTablePool.java:89)
at org.apache.hadoop.hbase.rest.RowResultGenerator.<init>(RowResultGenerator.java:49)
at org.apache.hadoop.hbase.rest.ResultGenerator.fromRowSpec(ResultGenerator.java:35)
at org.apache.hadoop.hbase.rest.RowResource.get(RowResource.java:85)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
................
Caused by: org.apache.hadoop.hbase.TableNotFoundException: api
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:724)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:593)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:558)
at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:172)
at org.apache.hadoop.hbase.client.HTableFactory.createHTableInterface(HTableFactory.java:36)
... 43 more
I am able to hit http://localhost:8080 from the browser and it gives me all the tables present.I have no clue why it is adding /api/userstable in the url .
Please tell me how can I resolve it or if there is some other forum to which I can point this issue.
Thanks
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Re: Facing issues in rest webservice with Hbase using Ruby
Posted by "vincent.peres@gmail.com" <vi...@gmail.com>.
We are using MassiveRecord here at Companybook, it's a ruby client for HBase
using Thrift. There is also an ORM on top of that!
https://github.com/CompanyBook/massive_record
Let me know if it fits your requirements, and why if it doesn't so we can
continue to improve it :)
On Sat, Aug 27, 2011 at 2:30 AM, Andrew Purtell <ap...@apache.org> wrote:
> Stuti,
>
> > 2011-08-25 15:10:56,807 ERROR org.mortbay.log: /api/userstable
> > java.lang.RuntimeException:
> org.apache.hadoop.hbase.TableNotFoundException: api
>
>
> Whatever you are using to communicate with the HBase REST server was
> designed for the previous version of it.
>
> URLs to the REST interface no longer begin with /api
>
> Now, URLs begin with the table name, e.g. /userstable
>
> You will need to contact the supplier of this "" package for a more recent
> version, or use something else.
>
>
> Best regards,
>
>
> - Andy
>
> Problems worthy of attack prove their worth by hitting back. - Piet Hein
> (via Tom White)
>
>
Re: Facing issues in rest webservice with Hbase using Ruby
Posted by Andrew Purtell <ap...@apache.org>.
Stuti,
> 2011-08-25 15:10:56,807 ERROR org.mortbay.log: /api/userstable
> java.lang.RuntimeException: org.apache.hadoop.hbase.TableNotFoundException: api
Whatever you are using to communicate with the HBase REST server was designed for the previous version of it.
URLs to the REST interface no longer begin with /api
Now, URLs begin with the table name, e.g. /userstable
You will need to contact the supplier of this "" package for a more recent version, or use something else.
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White)