DataGravitatorInterceptor logs ERROR when alone in cluster

See JBCACHE-1220.

Logging after making 1 request for a static page in a distributable webapp when the node was the only cluster member:

11:45:04,122 ERROR [DataGravitatorInterceptor] No replies to call _gravitateData; id:35(/JSESSION/localhost/ROOT/FC5F1D24DE0C89413E2D633331C6F030, true, false). Perhaps we're alone in the cluster?
11:45:04,128 ERROR [DataGravitatorInterceptor] No replies to call _gravitateData; id:35(/JSESSION/localhost/ROOT/FC5F1D24DE0C89413E2D633331C6F030, true, false). Perhaps we're alone in the cluster?
11:47:35,104 ERROR [DataGravitatorInterceptor] No replies to call _gravitateData; id:35(/JSESSION/localhost/ROOT/FC5F1D24DE0C89413E2D633331C6F030, true, false). Perhaps we're alone in the cluster?
11:47:35,107 ERROR [DataGravitatorInterceptor] No replies to call _gravitateData; id:35(/JSESSION/localhost/ROOT/FC5F1D24DE0C89413E2D633331C6F030, true, false). Perhaps we're alone in the cluster?
11:47:35,195 ERROR [DataGravitatorInterceptor] No replies to call _gravitateData; id:35(/JSESSION/localhost/ROOT/FC5F1D24DE0C89413E2D633331C6F030, true, false). Perhaps we're alone in the cluster?
11:47:35,198 ERROR [DataGravitatorInterceptor] No replies to call _gravitateData; id:35(/JSESSION/localhost/ROOT/FC5F1D24DE0C89413E2D633331C6F030, true, false). Perhaps we're alone in the cluster?
11:47:35,328 ERROR [DataGravitatorInterceptor] No replies to call _gravitateData; id:35(/JSESSION/localhost/ROOT/FC5F1D24DE0C89413E2D633331C6F030, true, false). Perhaps we're alone in the cluster?
11:47:35,331 ERROR [DataGravitatorInterceptor] No replies to call _gravitateData; id:35(/JSESSION/localhost/ROOT/FC5F1D24DE0C89413E2D633331C6F030, true, false). Perhaps we're alone in the cluster?

Need to decide how to get this fixed in the EAP; probably by moving to JBC 1.4.1.SP7.