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From: mlanciau <mlanciau@gmail.com>
Date: Wed, 3 Oct 2012 11:46:39 +0200
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 <CAJ=0uuSWZL6J__1_HF5hNrTerdA22reTOrNmx5r4DNLYHYKmOg@mail.gmail.com>
Subject: Re: Failure connecting to Hbase remotely from Tomcat 6 Servlet
To: user@hbase.apache.org
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Hello Mouradk

I think if the jar works well, there is no problem with HBase so be free to
reply directly on my email : mlanciau [at] gmail.

The hbase-site.xml must not be in the lib folder, but rather in a folder in
your build path.

If you don't have log, perhaps you can send me some code !

Regards

2012/10/1 Mouradk <mouradk78@googlemail.com>

> Hi,
>
> Thanks for you reply. I am trying to connect to Hbase running on a remote
> ec2 instance from a web app in tomcat running in a different ec2 instance.
> My Hbase handler lives in a jar of a another project  (foundation) in it's
> src folder. While debugging, the HBaseConfiguration picks up the properties
> from that base-site.xml file. This "foundation" project is bundled in the
> lib folder of the web application and referenced to it.
>
> Initially, I added the hbase-site.xml in the lib folder of the web app
> (WEB-INF/lib) but it' not being used there. I have just added the
> hbase-site.xml in tomcat conf folder along side context.xml and server.xml
> files (this is the place?)
>
> I restarted tomcat but this did not solve the problem. What I can't figure
> out is not getting anything in the logs, I can't trace an error or
> exception, to put me in the right direction. Is there something in the
> policy files that need to be set as well?
>
> is running a web app with ServletContextListener needs some permissions?
>
> Many thanks for your help,
>
> Mouradk
>
> On 1 Oct 2012, at 16:06, mlanciau <mlanciau@gmail.com> wrote:
>
> > Hello Mouradk,
> >
> > I use tomcat + HBase and I have no problem. (And it's really cool !)
> > I do not change any tomcat policy, just add the lib in WEB-INF/lib/ and
> the
> > hbase-site.xml in a conf folder (in the tomcat build path).
> >
> > How do you add the hbase-site.xml ?
> >
> > Regards.
> >
> > 2012/10/1 Mouradk <mouradk78@googlemail.com>
> >
> >> Hello,
> >>
> >> This is my first post so apologies if I am breaking some etiquette.
> >>
> >> I am not an expert on Hbase and have been flaying through threads of
> Hbase
> >> remote connection but with no luck solving my problem.
> >>
> >> I am running a Hbase/Hadoop single cluster on an EC2 instance (Ubuntu
> >> 10.4). I am also running a servlet on a tomcat6 server in another ec2
> >> instance. The plan is for the servlet to write and read to the remote
> Hbase
> >> instance. The servlet is running a context listener with some java
> routines
> >> (ServletContextListener).
> >>
> >> Now if I run the java project as a runnable jar instead of a servlet all
> >> is fine. It connects to Hbase and writes/reads from table. But on
> tomcat6
> >> it just freezes when attempting to connect to the Hbase instance.
> >>
> >> 2012-10-01 11:11:40,751 [Timer-4] INFO
> >> com.myApp.foundation.access.HBaseHandler  initialise(..) -
> Initialisation
> >> HbaseHandler configuration ...
> >> 2012-10-01 11:11:40,763 [Timer-4] DEBUG
> >> org.apache.hadoop.conf.Configuration  <init>(..) - java.io.IOException:
> >> config()
> >>    at
> org.apache.hadoop.conf.Configuration.<init>(Configuration.java:211)
> >>    at
> org.apache.hadoop.conf.Configuration.<init>(Configuration.java:198)
> >>    at
> >>
> org.apache.hadoop.hbase.HBaseConfiguration.<init>(HBaseConfiguration.java:33)
> >>    at
> >>
> com.myApp.foundation.access.HBaseHandler.initialise(HBaseHandler.java:507)
> >>    at
> >> com.myApp.foundation.access.HBaseHandler.<init>(HBaseHandler.java:53)
> >>    at
> >>
> com.myApp.foundation.access.HBaseHandler.getInstance(HBaseHandler.java:500)
> >>    at
> com.myApp.foundation.hbase.StorableRow.<clinit>(StorableRow.java:40)
> >>    at
> com.myApp.foundation.entities.Article.storeToHbase(Article.java:257)
> >>    at
> >>
> com.myApp.task.impl.HBaseArticlePersisterTask.process(HBaseArticlePersisterTask.java:101)
> >>    at
> com.myApp.foundation.task.QueueTask.performTask(QueueTask.java:101)
> >>    at
> >>
> com.myApp.runner.impl.HBasePersisterRunner$1.run(HBasePersisterRunner.java:46)
> >>    at java.util.TimerThread.mainLoop(Timer.java:512)
> >>    at java.util.TimerThread.run(Timer.java:462)
> >>
> >> 2012-10-01 11:11:40,803 [Timer-4] INFO
> >> com.myApp.foundation.access.HBaseHandler  initialise(..) - Config
> resource
> >> zookeeper.quorum: ip-10-10-10-10.eu-west-1.compute.internal
> >>
> >> 2012-10-01 11:11:40,803 [Timer-4] INFO
> >> com.myApp.foundation.access.HBaseHandler  initialise(..) - Config
> resource
> >> zookeeper.clientPort: 2181
> >>
> >> 2012-10-01 11:11:40,804 [Timer-4] INFO
> >> com.myApp.foundation.access.HBaseHandler  initialise(..) - Config
> resource
> >> hbase.master.info.port: 60010
> >>
> >> 2012-10-01 11:11:40,804 [Timer-4] INFO
> >> com.myApp.foundation.access.HBaseHandler  initialise(..) - Config
> resource
> >> hbase.master.info.bindAddress: ip-10-10-10-10.eu-west-1.compute.internal
> >> I can telnet the HBase instance. In the servlet I included the
> >> hbase-site.xml. But as you can see from the log, the zookkeeper.quorum
> is
> >> getting picked up as well as the port number. All necessary ports are
> open
> >> on the Hbase instance.
> >>
> >> Something is telling me tomcat6 policy configuration is to blame. But I
> >> don't see anything in the catalina logs. Are there any other logs I am
> >> missing or could guide me to the right logs? Anywhere I can track if
> >> Zookeeper is receiving any requests?
> >>
> >> Has someone experienced the same problem?
> >>
> >> Many thanks in advance.
> >>
> >> Mourad
> >
> >
> >
> >
> > --
> > Maxime LANCIAUX
> > http://maximelanciauxbi.blogspot.fr/
>
>


-- 
Maxime LANCIAUX
http://maximelanciauxbi.blogspot.fr/

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