Hi, I don't really know about the REST client but here at Companybook we are using MassiveRecord, which provides a basic thrift wrapper and an ORM if you want to go further. It's really advanced and work with the latest HBase (I see that HBase client hasn't been updated since 2 years now... HBase got massive updates since that time).
Hope that help! On Thu, Aug 25, 2011 at 11:59 AM, stuti <[email protected]> wrote: > > 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$HConnectionImplemen > tation@1acee78; hsa=localhost:36169 > 2011-08-25 15:10:56,791 DEBUG > > org.apache.hadoop.hbase.client.HConnectionManager$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.pref > etchRegionCache(HConnectionManager.java:648) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.loca > teRegionInMeta(HConnectionManager.java:702) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.loca > teRegion(HConnectionManager.java:593) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.loca > teRegion(HConnectionManager.java:558) > at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:172) > …………………… > 2011-08-25 15:10:56,807 ERROR org.mortbay.log: /api/userstable > java.lang.RuntimeException: org.apache.hadoop.hbase.TableNotFoundException: > api > at > > org.apache.hadoop.hbase.client.HTableFactory.createHTableInterface(HTableFactory > .java:38) > at > org.apache.hadoop.hbase.client.HTablePool.createHTable(HTablePool.java:133) > at > org.apache.hadoop.hbase.client.HTablePool.getTable(HTablePool.java:89) > at org.apache.hadoop.hbase.rest.RowResultGenerator.<init> > (RowResultGenerator.java:49) > at > > org.apache.hadoop.hbase.rest.ResultGenerator.fromRowSpec(ResultGenerator.java:35 > ) > at > org.apache.hadoop.hbase.rest.RowResource.get(RowResource.java:85) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > ……………. > Caused by: org.apache.hadoop.hbase.TableNotFoundException: api > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.loca > teRegionInMeta(HConnectionManager.java:724) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.loca > teRegion(HConnectionManager.java:593) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.loca > teRegion(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 > > > >
