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Also jitter the invalid cache period
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parent
bc5f6e1797
commit
928c50b59a
@ -296,16 +296,18 @@ class MatrixFederationAgent(object):
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response = yield make_deferred_yieldable(
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self._well_known_agent.request(b"GET", uri),
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)
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body = yield make_deferred_yieldable(readBody(response))
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if response.code != 200:
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raise Exception("Non-200 response %s", response.code)
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except Exception as e:
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logger.info("Connection error fetching %s: %s", uri_str, e)
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self._well_known_cache.set(server_name, None, WELL_KNOWN_INVALID_CACHE_PERIOD)
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defer.returnValue(None)
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logger.info("Error fetching %s: %s", uri_str, e)
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body = yield make_deferred_yieldable(readBody(response))
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# add some randomness to the TTL to avoid a stampeding herd every hour
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# after startup
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cache_period = WELL_KNOWN_INVALID_CACHE_PERIOD
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cache_period += random.uniform(0, WELL_KNOWN_DEFAULT_CACHE_PERIOD_JITTER)
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if response.code != 200:
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logger.info("Error response %i from %s", response.code, uri_str)
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self._well_known_cache.set(server_name, None, WELL_KNOWN_INVALID_CACHE_PERIOD)
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self._well_known_cache.set(server_name, None, cache_period)
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defer.returnValue(None)
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try:
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@ -326,8 +328,8 @@ class MatrixFederationAgent(object):
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)
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if cache_period is None:
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cache_period = WELL_KNOWN_DEFAULT_CACHE_PERIOD
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# add some randomness to the TTL to avoid a stampeding herd every hour after
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# startup
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# add some randomness to the TTL to avoid a stampeding herd every 24 hours
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# after startup
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cache_period += random.uniform(0, WELL_KNOWN_DEFAULT_CACHE_PERIOD_JITTER)
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else:
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cache_period = min(cache_period, WELL_KNOWN_MAX_CACHE_PERIOD)
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