From ef1c524bb381545761fdd1ad2a61db1693ddbd3d Mon Sep 17 00:00:00 2001 From: Richard van der Hoff <1389908+richvdh@users.noreply.github.com> Date: Thu, 22 Aug 2019 10:42:06 +0100 Subject: [PATCH] Improve error msg when key-fetch fails (#5896) There's no point doing a raise_from here, because the exception is always logged at warn with no stacktrace in the caller. Instead, let's try to give better messages to reduce confusion. In particular, this means that we won't log 'Failed to connect to remote server' when we don't even attempt to connect to the remote server due to blacklisting. --- changelog.d/5896.misc | 1 + synapse/crypto/keyring.py | 12 +++++++----- 2 files changed, 8 insertions(+), 5 deletions(-) create mode 100644 changelog.d/5896.misc diff --git a/changelog.d/5896.misc b/changelog.d/5896.misc new file mode 100644 index 000000000..ed47c747b --- /dev/null +++ b/changelog.d/5896.misc @@ -0,0 +1 @@ +Improve the logging when we have an error when fetching signing keys. diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py index 6c3e885e7..654accc84 100644 --- a/synapse/crypto/keyring.py +++ b/synapse/crypto/keyring.py @@ -18,7 +18,6 @@ import logging from collections import defaultdict import six -from six import raise_from from six.moves import urllib import attr @@ -657,9 +656,10 @@ class PerspectivesKeyFetcher(BaseV2KeyFetcher): }, ) except (NotRetryingDestination, RequestSendFailed) as e: - raise_from(KeyLookupError("Failed to connect to remote server"), e) + # these both have str() representations which we can't really improve upon + raise KeyLookupError(str(e)) except HttpResponseException as e: - raise_from(KeyLookupError("Remote server returned an error"), e) + raise KeyLookupError("Remote server returned an error: %s" % (e,)) keys = {} added_keys = [] @@ -821,9 +821,11 @@ class ServerKeyFetcher(BaseV2KeyFetcher): timeout=10000, ) except (NotRetryingDestination, RequestSendFailed) as e: - raise_from(KeyLookupError("Failed to connect to remote server"), e) + # these both have str() representations which we can't really improve + # upon + raise KeyLookupError(str(e)) except HttpResponseException as e: - raise_from(KeyLookupError("Remote server returned an error"), e) + raise KeyLookupError("Remote server returned an error: %s" % (e,)) if response["server_name"] != server_name: raise KeyLookupError(