Hi Zhong, Are you using Ruby for the development or Java ?
-----Original Message----- From: Zhong, Andy [mailto:[email protected]] Sent: Friday, August 26, 2011 10:04 AM To: [email protected] Subject: RE: rest web service with hbase The Resteasy web services has been used by us to handle realtime multi-threaded write/reading from Hbase, and the performance is quite decent. -----Original Message----- From: Stuti Awasthi [mailto:[email protected]] Sent: Thursday, August 25, 2011 11:20 PM To: [email protected] Subject: RE: rest web service with hbase Hi Vincent, We also started looking at Massive record and thrift interface. It is working quite smoothly till now but I was just wondering that we have to pass through many interface layers to access Hbase ( like ruby client -> rails -> massive record -> thrift -> Hbase and vice versa ) For the small application performance is fine but what about the performance with big data applications. Are these not slowing the client - server interaction to some extent. Please put your thoughts on this. Thanks -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Thursday, August 25, 2011 4:25 PM To: [email protected] Subject: Re: rest web service with hbase 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$HConnectionImplementat ion: > Cached location for .META.,,1.1028785192 is localhost:36169 > 2011-08-25 15:10:56,728 DEBUG > org.apache.hadoop.hbase.rest.RowResource: GET > http://localhost:8080/api/userstable > 2011-08-25 15:10:56,762 INFO org.apache.zookeeper.ZooKeeper: > Initiating client connection, connectString=localhost:2181 > sessionTimeout=180000 watcher=hconnection > 2011-08-25 15:10:56,765 INFO org.apache.zookeeper.ClientCnxn: Opening > socket connection to server localhost/10.33.100.107:2181 > 2011-08-25 15:10:56,765 INFO org.apache.zookeeper.ClientCnxn: Socket > connection established to localhost/10.33.100.107:2181, initiating > session > 2011-08-25 15:10:56,778 INFO org.apache.zookeeper.ClientCnxn: Session > establishment complete on server localhost/10.33.100.107:2181, > sessionid = 0x131fc710262001f, negotiated timeout = 40000 > 2011-08-25 15:10:56,790 DEBUG > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementat ion: > Lookedup root region location, > > connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnecti > onImplemen > tation@1acee78; hsa=localhost:36169 > 2011-08-25 15:10:56,791 DEBUG > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementat ion: > Cached location for .META.,,1.1028785192 is localhost:36169 > 2011-08-25 15:10:56,803 WARN > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementat ion: > Encountered problems when prefetch META table: > org.apache.hadoop.hbase.TableNotFoundException: Cannot find row in .META. > for > table: api, row=api,,99999999999999 > at > org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:136 ) > at > org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:95) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplement > ation.pref > etchRegionCache(HConnectionManager.java:648) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplement > ation.loca > teRegionInMeta(HConnectionManager.java:702) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplement > ation.loca > teRegion(HConnectionManager.java:593) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplement > ation.loca > teRegion(HConnectionManager.java:558) > at > org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:172) > ........................ > 2011-08-25 15:10:56,807 ERROR org.mortbay.log: /api/userstable > java.lang.RuntimeException: org.apache.hadoop.hbase.TableNotFoundException: > api > at > > org.apache.hadoop.hbase.client.HTableFactory.createHTableInterface(HTa > bleFactory > .java:38) > at > org.apache.hadoop.hbase.client.HTablePool.createHTable(HTablePool.java:1 33) > at > org.apache.hadoop.hbase.client.HTablePool.getTable(HTablePool.java:89) > at org.apache.hadoop.hbase.rest.RowResultGenerator.<init> > (RowResultGenerator.java:49) > at > > org.apache.hadoop.hbase.rest.ResultGenerator.fromRowSpec(ResultGenerat > or.java:35 > ) > at > org.apache.hadoop.hbase.rest.RowResource.get(RowResource.java:85) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native > Method) ................ > Caused by: org.apache.hadoop.hbase.TableNotFoundException: api > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplement > ation.loca > teRegionInMeta(HConnectionManager.java:724) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplement > ation.loca > teRegion(HConnectionManager.java:593) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplement > ation.loca > teRegion(HConnectionManager.java:558) > at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:172) > at > > org.apache.hadoop.hbase.client.HTableFactory.createHTableInterface(HTa > bleFactory > .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 > > > > ::DISCLAIMER:: ------------------------------------------------------------------------ ----------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. 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