problem in Creating connection pool!!!

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EJB programming & troubleshooting: problem in Creating connection pool!!!

  1. problem in Creating connection pool!!! (1 messages)

    My weblogic server was working properly without any problem and i was able to access my oracle database.But when i restarted it recently it is showing the following error and
    i couldn't connect to database.I didn't change anything. what could be the cause????

    ---------- LOGIN ERROR CODE: 24327
    Tue Jun 05 16:56:51 BST 2001:<I> <JDBC Pool> Sleeping in createResource()
    Tue Jun 05 16:56:52 BST 2001:<E> <JDBC Pool> Failed to create connection pool "o
    raclePool"
    weblogic.common.ResourceException: weblogic.common.ResourceException:
    Could not create pool connection. The DBMS driver exception was:
    java.sql.SQLException: ORA-24327: need explicit attach before authenticating a user - (SHIVA/********)
            at weblogic.db.oci.OciConnection.getLDAException(OciConnection.java:143)
  2. Please check the TNS name of ORacle u are connecting. It could have been altered.