Connection Refused-ERROR_STACK = (ERROR = (CODE = 12505) (EMFI = 4))

We have a web application that downloads a java applet on the client computer. Subsequently the applet connects to database with the oracle server.

Here's the connection string

Conn='jdbc:Oracle:thin:@10.0.216.52:1528:BTPRD'

TNSNAMES. ORA has the following entry
*********************
BTLPAR =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP) (HOST = 10.0.216.52)(PORT = 1528))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = BTPRD)
)
)

We get the following error when trying to connect to the oracle of the java applet database:

--------------------------
IO exception: connection refused (DESCRIPTION = (TMP =)(VSNNUM=169870336) (ERR = 12505) (ERROR_STACK = (ERROR = (CODE = 12505) (EMFI = 4)))
---------------------

The Oracle database server is a version of RAC Server (Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi), that it is behind a firewall. But the same machine where I use the applet, I am able to connect to the database to oracle using SQL plus, so I my assuming the firewall should not be a problem.

Earlier, we had a server no RAC (Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi) and using the same we have been able to connect to the Oracle server and retrieve the data. It was also behind the firewall

I tried to connect to a different database to Oracle (Oracle Database 10g Enterprise Edition Release 10.2.0.4.0) applet even and I am able to connect successfully. But he is not behind the firewall and a stand-alone database (no CARS).

The same machine cleint, using a simple java program that I am able to connect to the oracle RAC server.

The only conclusion I can draw on is,
1 we need to have a separate set of Oracle (classes12.jar) drivers to connect to RAC Server?
2. do we need to do something different with an Applet when connecting to the RAC environment.

Any help would be much appreciated.

Concerning

To connect to a CAR service, you must use a service connection string.

http://www.Oracle.com/technology/tech/Java/sqlj_jdbc/htdocs/jdbc_faq.html#05_10

Douglas

Tags: Oracle

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