c++ server memory leak in a broadcasting model.

[Arthur Wang]

hi all:

    I have 3 grpc c++ servers(A/B/C) and they work as in broadcast model: the client sent every request to serverA, and serverA then broadcast the request the serverB & serverC in an asynchronous way.

                   Client

                      |

                     A

                   /    \

                 /       \

                B        C

but ServerA seems get a memory leak problem:   every 40k requests from client will make its memory gain about 5m~8m.   I examined a lot on serverA 's code, but cannot find anything wrong.

Can anyone help take a look at my code(attchmented)?

Env:

os: win10 

grpc:1.21.x

lang: c++

[Arthur Wang]

ServerB & ServerC is a ping-pong server. 

[Arthur Wang]

Also, if I don't trigger the broadcasting procedure, the memory usage seems good.  The AsyncUnaryGreeterClient must got something wrong, but I can't figure it out.