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From Suraj Varma <svarma...@gmail.com>
Subject Re: HBase remote client configuration experience
Date Sat, 13 Mar 2010 23:05:26 GMT
Oye - ok ... will do.
--Suraj

On Sat, Mar 13, 2010 at 2:59 PM, Jean-Daniel Cryans <jdcryans@apache.org>wrote:

> Suraj,
>
> The mailing list doesn't accept attachments 99% of the time, might as
> well post it in the jira ;)
>
> J-D
>
> On Sat, Mar 13, 2010 at 2:55 PM, Suraj Varma <svarma.ng@gmail.com> wrote:
> > Hi J-D:
> > I wrote a patch for this (also attached) and wanted to get your thoughts
> > before submitting it.
> > Please see attached.
> > Thanks,
> > --Suraj
> > On Tue, Mar 9, 2010 at 10:27 AM, Jean-Daniel Cryans <jdcryans@apache.org
> >
> > wrote:
> >>
> >> Totally agree, I created
> https://issues.apache.org/jira/browse/HBASE-2305
> >>
> >> J-D
> >>
> >> On Tue, Mar 9, 2010 at 8:13 AM, Doug Meil <
> doug.meil@explorysmedical.com>
> >> wrote:
> >> > Hi Jeff-
> >> >
> >> > Thanks for responding.  I agree that "hard-coding" is certainly not a
> >> > good idea, but the intent of the post was to illustrate *which*
> minimal
> >> > parameters were getting used to establish a remote connection (i.e.,
> not
> >> > necessarily *where*).
> >> >
> >> > One of the other points of this observation was a request for the
> >> > defaulting of a zookeeper client port value which appears to be
> required
> >> > either supplied via XML or in code.  Personally, I'd like less
> wherever is
> >> > reasonable.
> >> >
> >> >> FYI... If the last parameter isn't set you'll get the following
> >> >> error....
> >> >>     could this be defaulted to a reasonable value?
> >> >
> >> >
> >> >
> >> >
> >> > -----Original Message-----
> >> > From: Jeff Zhang [mailto:zjffdu@gmail.com]
> >> > Sent: Tuesday, March 09, 2010 10:17 AM
> >> > To: hbase-user@hadoop.apache.org
> >> > Subject: Re: HBase remote client configuration experience
> >> >
> >> > Hi Doug,
> >> >
> >> > In my opinion, when using HBase Java API, you should put
> hbase-site.xml
> >> > in
> >> > classpath. Set the parameter in hase-site.xml. Hard coding the
> >> > parameters is
> >> > not a good idea.
> >> >
> >> >
> >> >
> >> > On Tue, Mar 9, 2010 at 7:09 AM, Doug Meil
> >> > <doug.meil@explorysmedical.com>wrote:
> >> >
> >> >> Greetings-
> >> >>
> >> >> The question of HBase client remote configuration (i.e., the client
> is
> >> >> not
> >> >> running on the same machine as the HBase master) comes up
> periodically
> >> >> on
> >> >> these dist-lists and a common theme is a lack of documentation on
> >> >> exactly
> >> >> what it takes to configure a remote client connection.
> >> >>
> >> >> After some trial and error, this seems to be the absolute minimum
> >> >> number of
> >> >> parameters required for connecting to a remote HBase instance (tested
> >> >> with
> >> >> HBase 0.20.3).
> >> >>
> >> >> HBaseConfiguration config = new HBaseConfiguration();
> >> >> config.clear();
> >> >> config.set("hbase.zookeeper.quorum", "server");
> >> >> config.set("hbase.zookeeper.property.clientPort","2181");
> >> >>
> >> >> This is consistent with other references to the importance of
> >> >> "hbase.zookeeper.quorum" except that we did this testing with the
> >> >> intent of
> >> >> connecting using only parameters set in code to eliminate any
> classpath
> >> >> issues with XML files.
> >> >>
> >> >> FYI... If the last parameter isn't set you'll get the following
> >> >> error....
> >> >>     could this be defaulted to a reasonable value?
> >> >>
> >> >>
> >> >> 10/03/09 10:04:55 ERROR zookeeper.ZooKeeperWrapper: no clientPort
> found
> >> >> in
> >> >> zoo.cfg
> >> >> Exception in thread "main" java.io.IOException: Could not read quorum
> >> >> servers from zoo.cfg
> >> >>      at
> >> >>
> >> >>
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.<init>(ZooKeeperWrapper.java:85)
> >> >>      at
> >> >>
> >> >>
> org.apache.hadoop.hbase.client.HConnectionManager$ClientZKWatcher.getZooKeeperWrapper(HConnectionManager.java:223)
> >> >>      at
> >> >>
> >> >>
> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getZooKeeperWrapper(HConnectionManager.java:932)
> >> >>      at
> >> >>
> >> >>
> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRootRegion(HConnectionManager.java:948)
> >> >>      at
> >> >>
> >> >>
> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:625)
> >> >>
> >> >>
> >> >> Doug Meil
> >> >> Director of Engineering
> >> >> doug.meil@explorys.net
> >> >>
> >> >>
> >> >
> >> >
> >> > --
> >> > Best Regards
> >> >
> >> > Jeff Zhang
> >> >
> >
> >
>

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