pickle.go: Unrecognized type *big.Int for value

[ljurk]

When sending big numbers to carbon-relay-ng it fails with the error message:

[ERROR] pickle.go: Unrecognized type *big.Int for value

You can reproduces the error with this script:

import socket
import pickle
import time
import struct
import math


def send_to_graphite(metric, value, timestamp=None, host="localhost", port=2004):
    if timestamp is None:
        timestamp = int(time.time())

    # Construct the data as a list of tuples
    data = [(metric, (timestamp, value))]

    # Pickle the data
    payload = pickle.dumps(data)

    try:
        # Create a socket connection to Graphite server
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.connect((host, port))
        # Send the pickled data
        size = struct.pack("!L", len(payload))
        sock.sendall(size)
        sock.sendall(payload)
        sock.close()
        print(f"Sent {metric} = {value} to Graphite at {host}:{port}")
    except Exception as e:
        print(f"Error sending data to Graphite: {e}")


if __name__ == "__main__":
    large_int = int(math.pow(10, 20))  # A large integer exceeding regular int range

    send_to_graphite("my.test.metric", large_int)

I've already fixed it by adding (*big.Int) to the allowed datatypes. (*big.Int) was already allowed for the timestamp.
I'll create a PR.