server - How to increase message size in grpc using python

Question

I am using grpc for message passing and am testing a simple server and client. When my message size goes over the limit, I get this error.

grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with 
(StatusCode.INVALID_ARGUMENT,
 Received message larger than max (7309898 vs. 4194304))>

How do I increase the message size on the server and client side?

Answer 1

Changing the message_length for both send and receive will do the trick.

channel = grpc.insecure_channel(
    'localhost:50051',
    options=[
        ('grpc.max_send_message_length', MAX_MESSAGE_LENGTH),
        ('grpc.max_receive_message_length', MAX_MESSAGE_LENGTH),
    ],
)

Answer 2

I had this problem, I solved it by setting the 'grpc.max_send_message_length' and 'grpc.max_receive_message_length' on both the client and the server:

In client (Credit to @Dumbo for this code snippet):

channel = grpc.insecure_channel(
    'localhost:50051',
    options=[
        ('grpc.max_send_message_length', MAX_MESSAGE_LENGTH),
        ('grpc.max_receive_message_length', MAX_MESSAGE_LENGTH),
    ],
)

In server:

server = grpc.server(futures.ThreadPoolExecutor(max_workers=10), options = [
        ('grpc.max_send_message_length', MAX_MESSAGE_LENGTH),
        ('grpc.max_receive_message_length', MAX_MESSAGE_LENGTH)
    ])

Answer 3

You should not increase the message size.
It comes with a performance penalty.
In real situations one implements paging to split too large messages.