JCAP512 and JCAP6 conflict with concurrent database connectivity

So here is the situation:
Environment:
- We have a production JCAP6 appserver (AIX server 1) running a project pulling data from database A
- We have 4 JCAP512 domains on AIX Servers 2,3,4 running 4 distinct projects pulling data from server A
- All project run on a schedule of 5 minutes and login to the server with the same login
- Database A is SQL Server
- repository based code
Scenario:
- All 5 above processes run concurrently in the greater JCAPS environment.
- When all 5 processes are running, the JCAP6 process runs fine with no issue but at the same time the 4 JCAP512 processes hang on the database side waiting for a resultset with a wait status of ASYNC_NETWORK_IO
- As soon as the JCAP6 process completes, all 4 JCAP512 processes start running with no errors. Once the JCAP6 process starts again, same result.
- We shut off the JCAP6 process and all 4 JCAP512 processes run with no issue
So after my high-school proof setup above my question comes to what is going on??? All of these processes run on their own isolated physical and application servers. Their only commonaliy is the login to the database. Are there any known database connectivity settings that would limit user transactions if another (same) user connection currently exists?
Has anybody seen anything like this? Ay assistance would be greatly appreciated.
Bryan
Edited by: bgrant88 on Jan 29, 2010 2:15 PM

I've never worked with the old version of the toolkit, so I don't know how it did things, but looking inside the SQL prep VI, it only generates a command, and the the column name VI wants a recordset. I'm not super familiar with all the internals of ADO, but my understanding is that is standard - you only have the columns after you execute the command and get the recordset back. What you can apparently do here is insert the Execute Prepared SQL VI in the middle and that will return what you need.
I'm not sure why it worked before. Maybe the execute was hidden inside the prep VI or maybe you can get the column names out of the command object before execution. In general, I would recommend considering switching to the newer VIs.
Try to take over the world!

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