Error: ORA-01002: fetch our of sequence

I have searched the groups and BEA's website for a solution.  While I
can find many references to this error, the problems reported and the
situations seem to be different from what I'm experiencing.

We have a Change Management process that consists of several different
environments: Developer Sandbox, DevTest, SysTest, MigrationTest,
Production.

The code has been running for a few months under WebLogic 6.1 sp4
without problem.  We recently upgraded the WebLogic servers to 8.1 and
began getting this error in the Production environment. We have not
been able to duplicate the problem in any other environment; it only
occurs in Production.  In all the other environments, the error has
never occured.  There are several applications other than the one
exhibiting the error that are running without problem, but these
applications do not use Blobs.

When we first bring up the WebLogic server, all will run just fine.
We can upload files/images to the Oracle server and store them in a
Blob without error.  After the server has been running for 3 to 4
hours, we will begin to receive the "ORA-01002: fetch our of sequence"
error when we attempt to upload a file. At that time, we can still
successfully read from the Blob table. The file size doesn't matter
nor does issue seem to be affected by the number of uploads.  I have
continously uploaded documents for about an hour (much more than the
normal load) without error.

If I undeploy the JDBC Data Source and the Connection Pool and then
redeploy them, the uploads will again function correctly for 3 to 4
hours at which time we begin receiving the errors again.

I have searched the WebLogic logs and can find nothing that seems to
correlate to when these errors begin.  The Java application traps the
error and it is not logged in the WLS log at all.

Version Info:
WebLogic Server 8.1
Oracle Server 8.1.7.4.12
Oracle Client on WLS server 8.1.7
We are using Oracle's thin JDBC driver (ocijdbc8), not the Weblogic
driver.

Code:
=================================================
int result = 0;
int id = 0;
Connection conn = null;
ResultSet rs = null;
try {
 // Get our connection
 conn = ServiceLocator.getInstance().getDBConnection(Services.DATASOURCE);
 if (conn != null) {
   // Create the new record with an empty blob.
   PreparedStatement prepStmt = conn.prepareStatement
     (CompanyImageFilter.getSqlCreate());
   // SQL returned by CompanyImageFilter.getSqlCreate()
   // " INSERT INTO SP2_COMP_IMAGE " +
   // " (CREATED_DATE, CREATED_BY, UPDATED_DATE, UPDATED_BY, COMP_ID,
        CONTENT_TYPE, CONTENT_SIZE, CONTENT_PATH, CONTENT) " +
   // " VALUES(?, ?, ?, ?, ?, ?, ?, ?, EMPTY_BLOB()) ";
   Timestamp now = XASystem.getTimestamp();
   prepStmt.setTimestamp(1, now);
   prepStmt.setString(2, caller.toString());
   prepStmt.setTimestamp(3, now);
   prepStmt.setString(4, caller.toString());
   prepStmt.setInt(5, companyImage.getCompanyID());
   prepStmt.setString(6, companyImage.getContentType());
   prepStmt.setInt(7, companyImage.getContentSize());
   prepStmt.setString(8, companyImage.getContentPath());
   result = prepStmt.executeUpdate();
 
   // Fetch the primary key of the new record.
   prepStmt = conn.prepareStatement(CompanyImageFilter.getSqlSelectMaxID());
   rs = prepStmt.executeQuery();
   if (rs.next())
     id = rs.getInt(1);

   // Select the new empty blob for update.
   prepStmt = conn.prepareStatement
     (CompanyImageFilter.getSqlSelectForBlobUpdate());
   // SQL returned by CompanyImageFilter.getSqlSelectForBlobUpdate()
   // " SELECT CONTENT FROM SP2_COMP_IMAGE WHERE ID = ? FOR UPDATE "
   prepStmt.setInt(1, id);
   rs = prepStmt.executeQuery();
   java.sql.Blob dbBlob = null;
   if (rs.next()) {
     dbBlob = rs.getBlob(1);
   }

   // Copy the byte stream to the blob.               
   java.io.InputStream is = new java.io.ByteArrayInputStream
     (companyImage.getContent());
   java.io.OutputStream os =
     ((weblogic.jdbc.vendor.oracle.OracleThinBlob)dbBlob)
     .getBinaryOutputStream();
   byte[] inBytes = new byte[65534]; // Per BEA, default size for
connection.
   int numBytes = is.read(inBytes);
   while (numBytes > 0) {
     os.write(inBytes, 0, numBytes);
     numBytes = is.read(inBytes);
   }
   os.flush();

   // Update the blob in the database.
   prepStmt = conn.prepareStatement(CompanyImageFilter.getSqlUpdateBlobByID());
   // SQL returned by CompanyImageFilter.getSqlUpdateBlobByID()
   // " UPDATE SP2_COMP_IMAGE SET CONTENT = ? WHERE ID = ? "
   prepStmt.setBlob(1, dbBlob);
   prepStmt.setInt(2, id);
   prepStmt.executeUpdate();
   prepStmt.close();
   conn.close();
 }
} catch (Exception ex) {
 iExceptionHandler(ex, conn);
}
=================================================

Any help or suggestions will be greatly appreciated.

Thanks,
Kevin