Proxy connections getting ORA-01001: invalid cursor

Question

All,
I am having tremendous difficulty using Oracle proxy connections under WebSphere 5.1. The problem appears to be that the proxy sessions (or the logical connections) are not being closed properly resulting in 'invalid cursor' and 'fetch out of sequence' exceptions.
Here's the sequence of events:
Environment
AppServer : Websphere 5.1
Database : Oracle 10gR2
Datesource: oracle.jdbc.pool.OracleConnectionPoolDataSource
Start up application server
Check the sessions on the db
USERNAME                       TYPE       SERVER    MODULE
* APAX                           USER       DEDICATED
* APAX                           USER       DEDICATED
SYS                            USER       DEDICATED sqlplus@apaxIIdb (TNS V1-V3)* = connection pool sessions
Step 1: getting the connection
// lookup datasource in jndi
Connection myConnection = myDataSource.getConnection();Step 2: opening a proxy connection
Properties myProperties = new Properties();
myProperties.put("CONNECTION_TAG", aPrincipal);
myProperties.put("PROXY_USER_NAME", aPrincipal);
OracleConnection myOracleConnection =
  (OracleConnection) WSJdbcUtil.getNativeConnection((WSJdbcConnection) myConnection);
myOracleConnection.openProxySession(OracleConnection.PROXYTYPE_USER_NAME, myProperties);Step 3: check the sessions on the db
SQL>  select username, type, server, module
from v$session
where type != 'BACKGROUND'
and username is not null
order by username;
USERNAME                       TYPE       SERVER    MODULE
APAX                           USER       DEDICATED
APAX                           USER       DEDICATED
APAX                           USER       DEDICATED
SYS                            USER       DEDICATED sqlplus@apaxIIdb (TNS V1-V3)
* USER1                          USER       PSEUDO* = proxy connection
Step 4: prepare and execute query
myResultSet = myStatement.executeQuery();Exception thrown: java.sql.SQLException: ORA-01001: invalid cursor
SQLState = 72000
vendorCode = 1001
Session information:
USERNAME                       TYPE       SERVER    MODULE
APAX                           USER       DEDICATED
APAX                           USER       DEDICATED
SYS                            USER       DEDICATED sqlplus@apaxIIdb (TNS V1-V3)
* USER1                          USER       DEDICATED* = proxy session appears to have changed
Step 5: clear up
OracleConnection myOracleConnection =
  (OracleConnection) WSJdbcUtil.getNativeConnection((WSJdbcConnection) aConnection);
myOracleConnection.close(OracleConnection.PROXY_SESSION);
myOracleConnection.close();Check sessions again
USERNAME                       TYPE       SERVER    MODULE
APAX                           USER       DEDICATED
APAX                           USER       DEDICATED
SYS                            USER       DEDICATED sqlplus@apaxIIdb (TNS V1-V3)There are no Oracle udump files or other tracing information.
Any ideas?

Answer 1

We were getting ORA-01001 error messages that didn't appear to make sense when calling certain pl/sql procedures from a application running on a Weblogic/Apache platform. The errors would not occur when we invoked the same procedures via script from a standalone SQL client.
We were able to put an end to the Web application errors by upgrading our jdbc driver from 10.1.0.4.0 to 10.2.0.1.0.