ORA-12505

We are getting ORA-12505 (TNS:listener does not currently know of SID given in 
connect descriptor) only on BEA Weblogic connections!  We are getting this 
error only once in a while and are not able to reproduce it via 
sqlplus/toad/other clients.   Any suggestions?
 
Environment: 3-node Oracle RAC (10.2.0.3.0 on Solaris 10 w/ASM).
 
Thanks,
Abdul


      

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