JDBC url for oracle RAC

Posted by Enrico Giurin Wed, 11 Apr 2007 18:07:00 GMT

If you have to connect to oracle RAC (Real Application Cluster) using JDBC with thin driver, the classic url:
doesn’t work and you get the error ORA – 12505.
Instead, you must use this url:
If you have an oracle client, like toad, check the tsnames.ora for the correct values of SERVICE_NAME and host.

Posted in  | Tags ,  | 26 comments | no trackbacks


  1. Avatar Tel Aviv said 361 days later:

    I kept getting this error over and over. I was hoping that a simple copy paste will solve it, as I just got sooooo annoyed from trying to solve it in the last 2 hours… and praise the lord it worked :) Changing the URLs as u stated did the trick and the connection worked flawlessly.


  2. Avatar feedogator said 377 days later:

    Thanks Enrico , it is very helpful for me

  3. Avatar Sloey said 461 days later:

    Unfortunately for me even this didn’t work. I’m using a WebSphere 5 server with connection pools on a system with a 9i client connecting to a 10g RAC. When the client didn’t work I tried using jdbc as above, however I still get : Connection not available while invoking method queueRequest for resource jdbc/racserver. I can test the connection successfully but can’t create a pooled connection. J2CA0020E: The Connection Pool Manager could not allocate a Managed Connection: com.ibm.websphere.ce.j2c.ConnectionWaitTimeoutException

  4. Avatar Tú Phạm said 651 days later:

    Thanks alot, this artical help me much

  5. Avatar pmadrid said 692 days later:

    Use this url: jdbc:oracle:thin:@host1^host2:1521:service_name

  6. Avatar Sachin said 817 days later:

    Thanks a lot for the posting.. It helped us to get through

  7. Avatar Kalidass said 1057 days later:

    Some oracle forum posts seems to suggest that there is some issue with DB, but this post really helped.

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  13. Avatar shiek said 1553 days later:

    This works.. Thanks

  14. Avatar jeff said 1590 days later:

    thanks a lot…though the rac url looks nasty, i guess thatz the way to go….good job :)

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  16. Avatar vasant_kumbhar@yahoo.com said 1687 days later:


    in the above URL ’@’ stands for what ????

  17. Avatar sriram said 1715 days later:

    Thanks so much. It helped me to fix an issue.

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  19. Avatar Chow said 1994 days later:

    Awesome…It works..We’ve struggled for long time to resolve issues with RAC DB and JDBC connectivity.

    Thanks so much

  20. Avatar baohuim said 2101 days later:

    thanks so much ,it works fine for me

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  26. Avatar EHR systems said 3890 days later:

    Thanks a lot bro. I have been searching for a solution like for ages. And it took almost forever before i found it here. I think you need to get this in the front of the search results in google somehow. People need to find the solution easily.


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