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Merge pull request #1802 from matrix-org/erikj/remove_debug_deferreds
Remove full_twisted_stacktraces option
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commit
7a13fe16f7
2 changed files with 0 additions and 79 deletions
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@ -22,7 +22,6 @@ import yaml
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from string import Template
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import os
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import signal
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from synapse.util.debug import debug_deferreds
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DEFAULT_LOG_CONFIG = Template("""
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@ -71,8 +70,6 @@ class LoggingConfig(Config):
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self.verbosity = config.get("verbose", 0)
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self.log_config = self.abspath(config.get("log_config"))
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self.log_file = self.abspath(config.get("log_file"))
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if config.get("full_twisted_stacktraces"):
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debug_deferreds()
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def default_config(self, config_dir_path, server_name, **kwargs):
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log_file = self.abspath("homeserver.log")
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@ -88,11 +85,6 @@ class LoggingConfig(Config):
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# A yaml python logging config file
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log_config: "%(log_config)s"
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# Stop twisted from discarding the stack traces of exceptions in
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# deferreds by waiting a reactor tick before running a deferred's
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# callbacks.
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# full_twisted_stacktraces: true
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""" % locals()
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def read_arguments(self, args):
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@ -1,71 +0,0 @@
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# -*- coding: utf-8 -*-
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# Copyright 2015, 2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer, reactor
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from functools import wraps
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from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
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def debug_deferreds():
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"""Cause all deferreds to wait for a reactor tick before running their
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callbacks. This increases the chance of getting a stack trace out of
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a defer.inlineCallback since the code waiting on the deferred will get
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a chance to add an errback before the deferred runs."""
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# Helper method for retrieving and restoring the current logging context
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# around a callback.
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def with_logging_context(fn):
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context = LoggingContext.current_context()
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def restore_context_callback(x):
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with PreserveLoggingContext(context):
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return fn(x)
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return restore_context_callback
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# We are going to modify the __init__ method of defer.Deferred so we
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# need to get a copy of the old method so we can still call it.
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old__init__ = defer.Deferred.__init__
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# We need to create a deferred to bounce the callbacks through the reactor
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# but we don't want to add a callback when we create that deferred so we
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# we create a new type of deferred that uses the old __init__ method.
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# This is safe as long as the old __init__ method doesn't invoke an
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# __init__ using super.
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class Bouncer(defer.Deferred):
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__init__ = old__init__
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# We'll add this as a callback to all Deferreds. Twisted will wait until
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# the bouncer deferred resolves before calling the callbacks of the
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# original deferred.
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def bounce_callback(x):
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bouncer = Bouncer()
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reactor.callLater(0, with_logging_context(bouncer.callback), x)
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return bouncer
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# We'll add this as an errback to all Deferreds. Twisted will wait until
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# the bouncer deferred resolves before calling the errbacks of the
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# original deferred.
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def bounce_errback(x):
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bouncer = Bouncer()
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reactor.callLater(0, with_logging_context(bouncer.errback), x)
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return bouncer
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@wraps(old__init__)
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def new__init__(self, *args, **kargs):
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old__init__(self, *args, **kargs)
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self.addCallbacks(bounce_callback, bounce_errback)
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defer.Deferred.__init__ = new__init__
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