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Merge pull request #1866 from matrix-org/erikj/device_list_fixes

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Better handle 404 response for federation /send/
This commit is contained in:
Erik Johnston 2017-02-01 09:44:14 +00:00 committed by GitHub
commit 06567ec513
2 changed files with 18 additions and 2 deletions
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1
synapse/federation/transaction_queue.py
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@ -319,6 +319,7 @@ class TransactionQueue(object):
destination,
self.clock,
self.store,
backoff_on_404=True, # If we get a 404 the other side has gone
)
device_message_edus, device_stream_id, dev_list_id = (

19
synapse/util/retryutils.py
View File

@ -88,7 +88,7 @@ class RetryDestinationLimiter(object):
def __init__(self, destination, clock, store, retry_interval,
min_retry_interval=10 * 60 * 1000,
max_retry_interval=24 * 60 * 60 * 1000,
multiplier_retry_interval=5,):
multiplier_retry_interval=5, backoff_on_404=False):
"""Marks the destination as "down" if an exception is thrown in the
context, except for CodeMessageException with code < 500.
@ -107,6 +107,7 @@ class RetryDestinationLimiter(object):
a failed request, in milliseconds.
multiplier_retry_interval (int): The multiplier to use to increase
the retry interval after a failed request.
backoff_on_404 (bool): Back off if we get a 404
"""
self.clock = clock
self.store = store
@ -116,6 +117,7 @@ class RetryDestinationLimiter(object):
self.min_retry_interval = min_retry_interval
self.max_retry_interval = max_retry_interval
self.multiplier_retry_interval = multiplier_retry_interval
self.backoff_on_404 = backoff_on_404
def __enter__(self):
pass
@ -123,7 +125,20 @@ class RetryDestinationLimiter(object):
def __exit__(self, exc_type, exc_val, exc_tb):
valid_err_code = False
if exc_type is not None and issubclass(exc_type, CodeMessageException):
valid_err_code = exc_val.code != 429 and 0 <= exc_val.code < 500
# Some error codes are perfectly fine for some APIs, whereas other
# APIs may expect to never received e.g. a 404. It's important to
# handle 404 as some remote servers will return a 404 when the HS
# has been decommissioned.
if exc_val.code == 404 and self.backoff_on_404:
valid_err_code = False
elif exc_val.code == 429:
# 429 is us being aggresively rate limited, so lets rate limit
# ourselves.
valid_err_code = False
elif exc_val.code < 500:
valid_err_code = True
else:
valid_err_code = False
if exc_type is None or valid_err_code:
# We connected successfully.