diff --git a/synapse/util/retryutils.py b/synapse/util/retryutils.py
index e2de7fce91..cc88a0b532 100644
--- a/synapse/util/retryutils.py
+++ b/synapse/util/retryutils.py
@@ -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 +125,16 @@ 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
+ if exc_val.code < 400:
+ valid_err_code = True
+ elif exc_val.code == 404 and self.backoff_on_404:
+ valid_err_code = False
+ elif exc_val.code == 429:
+ 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.
|
