From b0f4119b8bc8ab2da6a6f5f6480da8a0b749c768 Mon Sep 17 00:00:00 2001 From: Marcus Date: Wed, 3 Feb 2021 22:47:30 +0100 Subject: [PATCH] Add debug logging to DNS SRV requests. (#9305) --- changelog.d/9305.misc | 1 + synapse/http/federation/matrix_federation_agent.py | 7 +++++++ 2 files changed, 8 insertions(+) create mode 100644 changelog.d/9305.misc diff --git a/changelog.d/9305.misc b/changelog.d/9305.misc new file mode 100644 index 000000000000..456bfbfdd711 --- /dev/null +++ b/changelog.d/9305.misc @@ -0,0 +1 @@ +Add debug logging for SRV lookups. Contributed by @Bubu. diff --git a/synapse/http/federation/matrix_federation_agent.py b/synapse/http/federation/matrix_federation_agent.py index 4c06a117d3fa..113fd4713434 100644 --- a/synapse/http/federation/matrix_federation_agent.py +++ b/synapse/http/federation/matrix_federation_agent.py @@ -323,12 +323,19 @@ async def _resolve_server(self) -> List[Server]: if port or _is_ip_literal(host): return [Server(host, port or 8448)] + logger.debug("Looking up SRV record for %s", host.decode(errors="replace")) server_list = await self._srv_resolver.resolve_service(b"_matrix._tcp." + host) if server_list: + logger.debug( + "Got %s from SRV lookup for %s", + ", ".join(map(str, server_list)), + host.decode(errors="replace"), + ) return server_list # No SRV records, so we fallback to host and 8448 + logger.debug("No SRV records for %s", host.decode(errors="replace")) return [Server(host, 8448)]