Multi datasource faliover problem - JDeveloper integrated Weblogic 10.3.5

Question

Hi all,
I have a problem with JDeveloper integrated weblogic (version 10.3.5) fail over to second datasource in multi data source (2 generic datasources) configuration environment.
My test goes like this:
1. I have two databases running on separate servers.
2. both data sources are up & running OK.
3. JDeveloper integrated weblogic configured with multi datasource, using algorithm failover, and failover callback class.
4. weblogic started and adf application running using first datasource in list.
5. if I unplug network cable or shut down first database, weblogic won't fail over to second datasource and still trying to use the first one.
Failover callback class:
package failover;
public class ConnectionPoolFailoverCallback implements weblogic.jdbc.extensions.ConnectionPoolFailoverCallback {
     static {
          System.out.println("------------------------------------------------------------");
          System.out.println("\n\n\tConnectionPoolFailoverCallback class initiated...\n\n\t");
          System.out.println("------------------------------------------------------------");
     public int allowPoolFailover(String currPool, String nextPool, int opcode) {
          System.out.println("Current Pool - " + currPool);
          System.out.println("Next Pool - " + nextPool);
          System.out.println("Operation Code - " + opcode);
          System.out.println("------------------------------------------------------------");
          if (opcode == OPCODE_CURR_POOL_DEAD) {
               System.out.println("\n\n\tConnectionPoolFailoverCallback     return OK.");
               return OK;
          } else {
               System.out.println("\n\n\tConnectionPoolFailoverCallback     return DONOT_FAILOVER.");
               return DONOT_FAILOVER;
}{code}
*Problem:* When I unplug network cable or shutdown first database, method allowPoolFailover returns OK, but weblogic won't switch to second datasource entering allowPoolFailover method again and again.
+Note:+ weblogic integrated in JDeveloper is running u development mode.
Did I miss something in configuration or something else?
Any help is appreciated.
Thanks in advance,
Alexandar                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer 1

Hi Alexandar,
Have you made any progress with this? We seem to have bumped into this issue as well. Connection requests are consistently routed to the disabled pool (it appears as disabled in the WLS console, but we can see the counters increasing steadily), the callback handler is called and returns OK, and the connection request is ultimately serviced by the active pool. So while the application still successfully handles requests, there's obviously an underlying problem in obtaining the connection.
Thanks,
Sebastien