From 95d38afe96bfb38e02de9767603b2655c07a7e0f Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Fri, 7 Jun 2019 12:34:52 +0100 Subject: [PATCH 1/2] Don't log exception when failing to fetch remote content. In particular, let's not log stack traces when we stop processing becuase the response body was too large. --- synapse/http/client.py | 13 +++++++++---- synapse/rest/media/v1/media_repository.py | 6 ++++-- 2 files changed, 13 insertions(+), 6 deletions(-) diff --git a/synapse/http/client.py b/synapse/http/client.py index 77fe68818b..5c073fff07 100644 --- a/synapse/http/client.py +++ b/synapse/http/client.py @@ -17,7 +17,7 @@ import logging from io import BytesIO -from six import text_type +from six import raise_from, text_type from six.moves import urllib import treq @@ -542,10 +542,15 @@ class SimpleHttpClient(object): length = yield make_deferred_yieldable( _readBodyToFile(response, output_stream, max_size) ) + except SynapseError: + # This can happen e.g. because the body is too large. + raise except Exception as e: - logger.exception("Failed to download body") - raise SynapseError( - 502, ("Failed to download remote body: %s" % e), Codes.UNKNOWN + raise_from( + SynapseError( + 502, ("Failed to download remote body: %s" % e), + ), + e ) defer.returnValue( diff --git a/synapse/rest/media/v1/media_repository.py b/synapse/rest/media/v1/media_repository.py index 8569677355..a4929dd5db 100644 --- a/synapse/rest/media/v1/media_repository.py +++ b/synapse/rest/media/v1/media_repository.py @@ -386,8 +386,10 @@ class MediaRepository(object): raise SynapseError(502, "Failed to fetch remote media") except SynapseError: - logger.exception("Failed to fetch remote media %s/%s", - server_name, media_id) + logger.warn( + "Failed to fetch remote media %s/%s", + server_name, media_id, + ) raise except NotRetryingDestination: logger.warn("Not retrying destination %r", server_name) From 5009d988da81c328d4f13fc8ceb89f85364a44bc Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Fri, 7 Jun 2019 12:37:38 +0100 Subject: [PATCH 2/2] Newsfile --- changelog.d/5390.bugfix | 1 + 1 file changed, 1 insertion(+) create mode 100644 changelog.d/5390.bugfix diff --git a/changelog.d/5390.bugfix b/changelog.d/5390.bugfix new file mode 100644 index 0000000000..e7b7483cf2 --- /dev/null +++ b/changelog.d/5390.bugfix @@ -0,0 +1 @@ +Fix handling of failures fetching remote content to not log failures as exceptions.