Fwd: jdbc - connection pool and connect frequency

Just to add some questions: if the messages below represent "normal" application
connection requests that use already established connection pool physical connections, why the port, assigned by the listener, changes with every request?
I mean, why this is happening more than once for a single physical connection?
I don't seem to find an explanation/documentation on how exactly the Oracle listener
handles jdbc connection pool requests.

Regards
Dimitre

• Original Message -------- Subject: jdbc - connection pool and connect frequency Date: Thu, 02 Dec 2010 17:58:42 +0100 From: Radoulov, Dimitre <cichomitiko_at_gmail.com> To: oracle-l_at_freelists.org

Hi all,
I'm trying to understand what exactly the following entries represent
(notice the frequency) ?

We have more than one application that use connection pooling through jdbc and listener logs that contain many entries like the these:

02-DEC-2010 17:34:18 *
(CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=34505)) * establish *
<my_host> * 0
02-DEC-2010 17:34:18 *
(CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=34504)) * establish *
<my_host> * 0
02-DEC-2010 17:34:18 *
(CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=34506)) * establish *
<my_host> * 0
02-DEC-2010 17:42:03 *
(CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=44922)) * establish *
<my_host> * 0
02-DEC-2010 17:44:07 *
(CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=45124)) * establish *
<my_host> * 0
02-DEC-2010 17:44:10 *
(CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=45143)) * establish *
<my_host> * 0
02-DEC-2010 17:44:10 *
(CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=45144)) * establish *
<my_host> * 0
02-DEC-2010 17:44:10 *
(CONNECT_DATA=(SID=<my_host>)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))) *
(ADDRESS=(PROTOCOL=tcp)(HOST=<my_host>)(PORT=45145)) * establish *
<my_host> * 0

I suppose these are connect requests that use already established connections from the connection pool and not new connections given v$session.logon_time does not reflect the timestamp reported in the listener log file, am I right?
Does anybody know how these requests are/could be controlled?

Regards
Dimitre

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