See below for properties that needs to be set in jacorb.properties file for connection timeout
# Wait the specified number of msecs for a reply to a request. If
# exceeded, a org.omg.CORBA.IMP_LIMIT exception will be thrown
#jacorb.client.pending_reply_timeout=0
# client-side connection idle timeout, set no non-zero to stop
# blocking after so many msecs.
#
# WARNING: This is independent of pending replies, i.e. the connection
# can also close, if the timeout is exceeded, but there are unanswered
# requests.
#jacorb.connection.client_idle_timeout=0
# max time a server keeps a connection open if nothing happens
#
# WARNING: This is independent of the requests currently being
# processed, i.e. the connection can also close, if the timeout is
# exceeded, but there are unanswered requests.
#
#jacorb.connection.server_timeout=10000