Cannot connect to oracle after upgrade to 9i

Question

Hey there,
kind of new in the arena so be kind and patient with me please.
Enviroment : sun
oracle : 8.0.5 now been upgraded to 9i with 8.0.5 clients installed on the machine
symptoms : since upgrading the Oracle to 9i we cannot connect to the 9i with jdbc
Question : Do we need to upgrade the client in our machines to 9i clients? is there any specific Driver Manager that I should use currently using Thin client thruogh port 1521?
HELP!!!!

Answer 1

First of all, there is not enough specifics in your
post, the problem could be anywhere - you should
provide at least an error message, an exception call
stack or something like this.
It could be a problem with the jar files provided by
oracle, which are in you client's class path. It used
to be called classesXXX.zip in oracle 8i, whatever the
name in oracle 9 is I do not know. But just make sure
that you have the exact oracle jar files in the class
path as the ones shipped with your oracle version.
Usually these files are found in
$ORACLE_HOME/jdbc/lib
I'll try to be more specific:
I use an 8.0.5 client and I'm trying to connect to a 9i .I didn't upgrade the client yet.While trying to connect via a connection pool that i built.I get an exception saying exceeding key size in method getConnection.
java.sql.SQLException: Exceding key size
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:420)
at oracle.jdbc.ttc7.O3log.<init>(O3log.java:255)
at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:166)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:103)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:148)
My qustions are :
Is it because I didn't upgrade the client?(Though it only seems logical that the 9i would support it)
If it isn't because of the client what is it?