DB2 connection rejected with JDBC and ODBC Good day to all,
Currently I have 4 as400 servers, with db2 installed, is the production server and development server with its two replicas.

The development java team uses IBM Toolbox for Java and JTOpen for conection to db2, in a Weblogic middleware, for direct connections to the database uses DbVisualizer with JTOpen (jt400.jar)

The team of RPG no has problem, at connect with IBM Access for Windows and work with DB2 

Mysteriously on Sunday the development server connections began to be rejected for Java team

The error log is:

Long Message:
The application requester cannot establish the connection. (Not able to pass connection to server job. Server job program was not found.)

Details:
   Type: java.sql.SQLException
   Error Code: -99999
   SQL State: 08001


None of the other three servers has this problem. In this page of support recommend 3 possible solutions


The system name is incorrect. One way to verify this is to use ping
with the specified system name. If ping fails, then there is a
TCP/IP configuration problem between your client and the system.
The user ID or password is incorrect.
The IBM i database host server is not started. You can start this by running STRHOSTSVR *DATABASE on the IBM i command line. You
can verify if the IBM i database host server is running using the
utilities.JPing application.


In step one send a ping to the server and it responds correctly in all machines of java team
The step 2 was extensively tested, and 3 was able be verified, RPG dev team was not problem

A test was made more with an ODBC client and the connection was rejected also with this error log 

Error in the connection test in initializing provider CWBSY1008

There was an error overall security rc=8007


I tried to find solution, but I have not found anything.

Other things I made


IPL Partial and Full - Result not work
Resetting router tables - Result not work
Power off firewall and antivirus - Result not work
Resetting password of QUSER - Result not work


Could you please help?
As I understand it, your development team got the error when using DbVisualizer with JTOpen (jt400.jar) for direct connections to the database.

I got the same exception with DBvis ver 9.1.10. The tool took a long time when clicking the connect button, then finally showed error code -99999. 

What I do to fix this is to disable the Proxy setting of DBvis:


Menu: Tool/Tool Properties
Go to General Tag->Proxy Setting
Check "No Proxy" and restart DBvisualizer.