grpc: received message larger than max error

[chowoocheol]

If followed below code (refer to swift-0.11.1),
the size of received massages shouldn't be a problem.

But, we've got below error message for more than 20MB size messages.
Does swift support 20MB message ?

swift code

// maxReceiveMsgSize uses 20MB as the default message size limit.
// the gRPC's default size is 4MB.
// Since Tiller has been change the messages' size to 20MB, so we should make this value to 20MB.
maxReceiveMsgSize = 1024 * 1024 * 20

error message

"message":"grpc: received message larger than max (4693470 vs. 4194304)