From f01cf98d62aa75a19a24619e8ebc7117c4732e70 Mon Sep 17 00:00:00 2001 From: AlessandroSpallina Date: Tue, 22 Mar 2022 17:17:41 +0100 Subject: [PATCH] fix #3530 added error log when tcp port is already in use --- lbry/blob_exchange/server.py | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/lbry/blob_exchange/server.py b/lbry/blob_exchange/server.py index a2ff8b698..152326fb4 100644 --- a/lbry/blob_exchange/server.py +++ b/lbry/blob_exchange/server.py @@ -1,6 +1,7 @@ import asyncio import binascii import logging +import socket import typing from json.decoder import JSONDecodeError from lbry.blob_exchange.serialization import BlobResponse, BlobRequest, blob_response_types @@ -167,6 +168,13 @@ class BlobServer: raise Exception("already running") async def _start_server(): + # checking if the port is in use + # thx https://stackoverflow.com/questions/2470971/fast-way-to-test-if-a-port-is-in-use-using-python/52872579#52872579 + with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: + if s.connect_ex(('localhost', port)) == 0: + # the port is already in use! + log.error("Failed to bind TCP {}:{}".format(interface, port)) + server = await self.loop.create_server( lambda: self.server_protocol_class(self.loop, self.blob_manager, self.lbrycrd_address, self.idle_timeout, self.transfer_timeout),