Memory Leakage in gRPC Server

[AmirM]

Hi

I wrapped a c++ gRPC server in a docker, and I observed when every time I ran the server docker, memory usage would increase and never went down. Valgrind did not report any leakage when I started and stopped the server from getting the report. 

==464== LEAK SUMMARY:

==464==    definitely lost: 0 bytes in 0 blocks

==464==    indirectly lost: 0 bytes in 0 blocks

==464==      possibly lost: 2,560 bytes in 8 blocks

==464==    still reachable: 520,878 bytes in 5,998 blocks

==464==                       of which reachable via heuristic:

==464==                         newarray           : 1,088 bytes in 2 blocks

==464==         suppressed: 0 bytes in 0 blocks

The code I is as simple as below:

class MathematicalOptimizationServiceImpl final : public mathematical_optimization::v1alpha1::MathematicalOptimizationService::Service {

Status SolveMPModel(ServerContext* context, const MPModelRequest* request, MPSolutionResponse* response) override {

operations_research::MPSolver::SolveWithProto(*request, response);

return Status::OK;

}

};

void RunServer() {

std::string server_address("0.0.0.0:5050");

MathematicalOptimizationServiceImpl service;

ServerBuilder builder;

builder.SetMaxReceiveMessageSize(1024 * 1024 * 256);

builder.SetMaxSendMessageSize(1024 * 1024 * 256);

builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());

builder.RegisterService(&service);

std::unique_ptr<Server> server(builder.BuildAndStart());

std::cout << "Server listening on " << server_address << std::endl;

server->Wait();

}

int main(int argc, char** argv) {

RunServer();

return 0;

}

Thanks for your help.

[veb...@google.com]

Would you give a small repro we can run and the output of full leak report to know what's leaked?