error when send multiple keys in one message

[weizaixl]

I want to apply the RDMA version of ps-lite in sparse case in whch one message contains multiple keys and multiple values. However, the error occurs. The worker sends 100 keys, however, the server only receives 1 keys. I wonder whether this implemention only works in dense case such as test_benchmark.cpp and byteps package in which on message contains only one key and many values. Thank you.