Set the "Maximum Open Sockets" setting appropriately on the Administration server.
(1) open file descriptors
(1) via WLST
Oracle�� Fusion Middleware
Securing a Production Environment for Oracle WebLogic Server
11g Release 1 (10.3.1)
E13705-01
Oracle Fusion Middleware: Securing a Production Environment for Oracle WebLogic Server, 11g Release 1 (10.3.1)
Oracle
2009-05-01
10.3.1
Prose(pdf)