From 13843f771ea64cfd4fb7e2f03854b9506f63fcfd Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Fri, 27 Apr 2018 12:17:13 +0100 Subject: [PATCH] Trap exceptions thrown within run_in_background Turn any exceptions that get thrown synchronously within run_in_background into Failures instead. --- synapse/util/logcontext.py | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/synapse/util/logcontext.py b/synapse/util/logcontext.py index d59adc236e..127581a0b4 100644 --- a/synapse/util/logcontext.py +++ b/synapse/util/logcontext.py @@ -308,7 +308,13 @@ def run_in_background(f, *args, **kwargs): on. """ current = LoggingContext.current_context() - res = f(*args, **kwargs) + try: + res = f(*args, **kwargs) + except: # noqa: E722 + # the assumption here is that the caller doesn't want to be disturbed + # by synchronous exceptions, so let's turn them into Failures. + return defer.fail() + if isinstance(res, defer.Deferred) and not res.called: # The function will have reset the context before returning, so # we need to restore it now.