suppress send if json_arg_vector is nonzero
suppress send if json_arg_vector is nonzero

chenm001/connectal,csail-csg/connectal,hanw/connectal,csail-csg/connectal,cambridgehackers/connectal,chenm001/connectal,hanw/connectal,cambridgehackers/connectal,chenm001/connectal,hanw/connectal,hanw/connectal,csail-csg/connectal,csail-csg/connectal,hanw/connectal,chenm001/connectal,cambridgehackers/connectal,chenm001/connectal,csail-csg/connectal,cambridgehackers/connectal,cambridgehackers/connectal