Thanks Ted and Sean,

It is great to find the archives, why I did not find them for so long time... 
:-)

The original coprocessor author reply me yesterday, it is my fault. In fact, 
that coprocessor is loaded after the hbase startup, not during hbase 
regionserver startup time. In their client application code , they invoke 
addCoprocessor() to load the coprocessor at run-time. So I should not put them 
into the hbase-site.xml. 
When loaded later, the HBaseAdmin.tableExist() can work, since at that time, 
all initialization is done. 
So this is not a version issue, it can work in 0.94.5 and 0.94.24 as well.

Thank you all for the help.
Ming

-----Original Message-----
From: Ted Yu [mailto:[email protected]] 
Sent: Thursday, October 16, 2014 10:29 PM
To: [email protected]
Subject: Re: when will hbase create the zookeeper znode 'root-region-server’ is 
created? Hbase 0.94

Ming:
The tar ball in the archive contains source code. See example below:

$ tar tzvf hbase-0.94.5.tar.gz | grep '\.java' | grep Assignment
-rw-r--r--  0 jenkins jenkins  47982 Feb  7  2013 
hbase-0.94.5/src/test/java/org/apache/hadoop/hbase/master/TestAssignmentManager.java
-rw-r--r--  0 jenkins jenkins  136645 Feb  7  2013 
hbase-0.94.5/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java

FYI

On Thu, Oct 16, 2014 at 7:18 AM, Sean Busbey <[email protected]> wrote:

> On Thu, Oct 16, 2014 at 2:18 AM, Liu, Ming (HPIT-GADSC) 
> <[email protected]>
> wrote:
>
> >
> >
> > By the way, I cannot find anywhere to download a 0.94.5 hbase source
> code,
> > can anyone tell me if there is somewhere I can find it?
> >
> > I know old version is obsolete , but this is not for production, but 
> > for research, so please help me if you have any idea. Thanks very 
> > much in advance.
> >
>
>
> In most cases you can get old versions of the HBase source from the 
> ASF
> archives:
>
> http://archive.apache.org/dist/hbase/hbase-0.94.5/
>
>
> --
> Sean
>

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