Just an update.  I took the problem off line and tried it command line.
I am able to get multiple clients with both SQL Server and Oracle.
Perhaps it is something with JBoss?

Any suggestions welcome.

Tim

-----Original Message-----
From: Cobble, Tim 
Sent: Thursday, November 06, 2003 1:30 PM
To: OJB Users List
Subject: SQL Server and Oracle problems.

All,

I am trying to compare different RDBMs.  I can get all three (MySQL, MS
SQL, and Oracle) working with one client.  When I try to test the
scaling abilities, MS SQL and Oracle choke.  I can only get a few
simultaneous connections.  Seems unlimited with MySQL.  

I know this is not a DB problem since I am comparing this with EJB's and
they scale as expected.  I am able to use 50 clients with all three DBs.

I have been using the MS Driver, JTDS, and JSQL for MS SQL; and the
Oracle released driver.

Complete failure with JTDS =    "Rollback on the underlying connection
failed".  And "you cannot rollback during a managed transaction".

This is deployed on JBoss.  Only doing a simple SELECT * from
table_name;

Any clues?  Thanks in advance!

Tim
Will provide any requested code/xml files.

Pertinent snippets attached.

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