[Python] How to enable parallel execution of ABAP in PyRFC?

I am migrating a project to PyRFC, using a server configuration.

My program is registering a function that has to be called. The incoming data is splitted across 3 DTP, hence my function will be called 3 times.

When we set the parallel execution in SAP to 1, everything is working fine and I am receiving one packet after another. But this is too slow! We need to have the executions running in parallel.

When we set the execution to 3 in SAP, it says that all packets are sent but I'm only receiving the first one.

Here is my implementation of PyRFC :


def launch_server():
"""Start server."""

# create server for ABAP system ABC
client_params = {
"lang": config["lang"],
"client": config["client"],
"passwd": config["passwd"],
"user": config["user"],
"sysnr": config["sysnr"],
"ashost": config["ashost"],
"dest": config["dest"],
"conncount": config["conncount"],
"trace": config["trace_level"]
}

# Define server parameters (SAP RFC server setup)
server_params = {
"gwhost": config["gwhost"],
"gwserv": config["gwserv"],
"dest": config["dest"],
"program_id": config["program_id"],
"trace": config["trace_level"]
}

server = Server(
server_params=server_params,
client_params=client_params,
config={
"check_date": False,
"check_time": False,
"port": 8081,
"debug": config["use_server_debug"] != 0,
"server_log": config["use_server_debug"] != 0
}
)

# expose python function to be called by ABAP
server.add_function("MY_FUNCTION", myFunctionImplementation)

# start server
server.serve()

# Enable pyrfc logging
logging.basicConfig(level=logging.DEBUG)

server_thread = Thread(target=launch_server)
server_thread.start()


In this example, when SAP is sending 3 packets at the same time I only receive one and myFunctionImplementation is called only once.

In this example, conncount is set to 10 which seems the only things to change to allow parallelization.

I hardly understand SAP internal processes, what am I missing? Is it possible to handle all three packets at the same time?

I also tried to enable bgRFC without success.

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