EJB call across server instance with multiple Datasource

Hi,
          I posted in the EJB group and was told people here will be able to help.
          I'm currently facing a serious integration problem. The problem occurs when an EJB in my application (my instance) tries to call another EJB in a separate application (in another instance). Hope someone can help me to overcome this.
          My setup is WLS 8.1 SP2 (1 domain, 2 instances) with Oracle 9i.
          The scenario is as follows:
          EJB A (tx required) in instance A calls EJB B (tx required) in instance B.
          EJB A uses datasource A in instance A to update database A and EJB B uses datasource B in instance B to update database B.
          When I tried with both datasources using non-XA driver and both using XA driver the result is the same, EJB A executes fine and can successfully invoke the method on EJB B. But when EJB B tries to lookup the datasource B, it goes to instance A to do that and of course fails to find it.
          It only works when I create and deploy datasource B (XA) to instance A as well, meaning I now have datasources A and B in instance A.
          It all works well when I use a servlet(e.g.) in instance A to call EJB B. Leading me to suspect that the error could be due to some problems or behaviour which I may have missed out during the propagation of the transaction or the EJB context.
          This behaviour seems very illogical, can someone please enlighten me. Any help will be very much appreciated.
          Thanks,
          Kelvin

You might try asking this over in the transaction group:
http://forums.bea.com/bea/forum.jspa?forumID=2052
-thorick

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Message was edited by: SilverSkyRat: Additional Question

EJB call across server instance with multiple Datasource

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