Connection problems with App Server database

Question

Hello All.
On my project it has been noticed in the database listener logs that our Application Server is attempting to make a jdbc connection to the database multiple times a second on different ports. The port numbers appear to be increasing on each attempt.
We believe this is causing the number of connections available to be rapidly taken up, and limiting the App Server from making any connections for future processes.
Here are some of the events in the database listener log:
20-AUG-2006 13:10:40 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))(SERVICE_NAME=PWTS)) * (ADDRESS=(PROTOCOL=tcp)(HOST=OUR_HOST)(PORT=37870)) * establish * PWTS * 0
20-AUG-2006 13:10:40 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))(SERVICE_NAME=PWTS)) * (ADDRESS=(PROTOCOL=tcp)(HOST=OUR_HOST)(PORT=37871)) * establish * PWTS * 0
20-AUG-2006 13:10:40 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))(SERVICE_NAME=PWTS)) * (ADDRESS=(PROTOCOL=tcp)(HOST=OUR_HOST)(PORT=37872)) * establish * PWTS * 0
20-AUG-2006 13:10:40 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))(SERVICE_NAME=PWTS)) * (ADDRESS=(PROTOCOL=tcp)(HOST=OUR_HOST)(PORT=37873)) * establish * PWTS * 0
20-AUG-2006 13:10:40 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))(SERVICE_NAME=PWTS)) * (ADDRESS=(PROTOCOL=tcp)(HOST=OUR_HOST)(PORT=37874)) * establish * PWTS * 0
20-AUG-2006 13:10:41 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))(SERVICE_NAME=PWTS)) * (ADDRESS=(PROTOCOL=tcp)(HOST=OUR_HOST)(PORT=37875)) * establish * PWTS * 0
20-AUG-2006 13:10:41 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))(SERVICE_NAME=PWTS)) * (ADDRESS=(PROTOCOL=tcp)(HOST=OUR_HOST)(PORT=37876)) * establish * PWTS * 0
Has anyone seen anything similar to this or have any suggestions as to where to look?
Thanks,
Sean

Answer 1

sqlnet does switch the ports dynamically, I guess for scaling and security - but I have to admit, I am not a db guru - o it's jsut what i remember from previous chats with colleaques..