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Merge pull request #1802 from matrix-org/erikj/remove_debug_deferreds

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Remove full_twisted_stacktraces option
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Erik Johnston 2017-01-12 14:25:51 +00:00 committed by GitHub
commit 7a13fe16f7
2 changed files with 0 additions and 79 deletions
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8
synapse/config/logger.py
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@ -22,7 +22,6 @@ import yaml
from string import Template
import os
import signal
from synapse.util.debug import debug_deferreds
DEFAULT_LOG_CONFIG = Template("""
@ -71,8 +70,6 @@ class LoggingConfig(Config):
self.verbosity = config.get("verbose", 0)
self.log_config = self.abspath(config.get("log_config"))
self.log_file = self.abspath(config.get("log_file"))
if config.get("full_twisted_stacktraces"):
debug_deferreds()
def default_config(self, config_dir_path, server_name, **kwargs):
log_file = self.abspath("homeserver.log")
@ -88,11 +85,6 @@ class LoggingConfig(Config):
# A yaml python logging config file
log_config: "%(log_config)s"
# Stop twisted from discarding the stack traces of exceptions in
# deferreds by waiting a reactor tick before running a deferred's
# callbacks.
# full_twisted_stacktraces: true
""" % locals()
def read_arguments(self, args):

71
synapse/util/debug.py
View file

@ -1,71 +0,0 @@
# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer, reactor
from functools import wraps
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
def debug_deferreds():
"""Cause all deferreds to wait for a reactor tick before running their
callbacks. This increases the chance of getting a stack trace out of
a defer.inlineCallback since the code waiting on the deferred will get
a chance to add an errback before the deferred runs."""
# Helper method for retrieving and restoring the current logging context
# around a callback.
def with_logging_context(fn):
context = LoggingContext.current_context()
def restore_context_callback(x):
with PreserveLoggingContext(context):
return fn(x)
return restore_context_callback
# We are going to modify the __init__ method of defer.Deferred so we
# need to get a copy of the old method so we can still call it.
old__init__ = defer.Deferred.__init__
# We need to create a deferred to bounce the callbacks through the reactor
# but we don't want to add a callback when we create that deferred so we
# we create a new type of deferred that uses the old __init__ method.
# This is safe as long as the old __init__ method doesn't invoke an
# __init__ using super.
class Bouncer(defer.Deferred):
__init__ = old__init__
# We'll add this as a callback to all Deferreds. Twisted will wait until
# the bouncer deferred resolves before calling the callbacks of the
# original deferred.
def bounce_callback(x):
bouncer = Bouncer()
reactor.callLater(0, with_logging_context(bouncer.callback), x)
return bouncer
# We'll add this as an errback to all Deferreds. Twisted will wait until
# the bouncer deferred resolves before calling the errbacks of the
# original deferred.
def bounce_errback(x):
bouncer = Bouncer()
reactor.callLater(0, with_logging_context(bouncer.errback), x)
return bouncer
@wraps(old__init__)
def new__init__(self, *args, **kargs):
old__init__(self, *args, **kargs)
self.addCallbacks(bounce_callback, bounce_errback)
defer.Deferred.__init__ = new__init__