ora-12571 with Oracle 7.3.2.3.7 on Windows NT 4.0

Hi,
I'm using Oracle 7.3.2.3.7 on Windows Nt 4.0 and I've some erratic problems connecting to the rdbms from Windows 95 and Windows 3.11 with sqlnet V2 (TCP/IP).

There are 5 databases on the server (with 512 Mb RAM).

Sporadically, you cannot establish new TCP-connections to some of the databases, while the current sessions keep working normally and the rest of the databases keep on working also.

Loopback non-TCP connections from the NT console (with connect string  @2:SID ) are right, only remote TCP connection refuse to work: the client application simply hangs gracefully.

These errors appears in the ora_xxxx.trc trace files and sqlnet.log file:

1. TNS: packet write failure. and
2. TNS: connection is busy.

Shutting down the listener and/or instance doesn't suffices, I've to restart the oracle services from the NT Control Panel!!

SQL*Net configuration files where generated by Oracle Network Manager.

Oracle Support advised me to spread the databases between 2 sqlnet listeners, but it didn't help...

HELP!! Is there anybody who can help me?

You can also email me to cavannar_at_telefonica.com.ar and rcavanna_at_hotmail.com.

Thanks in advance,
Rodolfo Cavanna - Oracle DBA.

+------------------------------+

| May the Force be With You! |
+------------------------------+

-------------------==== Posted via Deja News ====-----------------------
      http://www.dejanews.com/     Search, Read, Post to Usenet