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Bump timeout on get_missing_events request

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This commit is contained in:
Richard van der Hoff 2018-09-18 15:02:51 +01:00
parent 286d6930b7
commit 550007cb0e
1 changed files with 30 additions and 1 deletions
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31
synapse/handlers/federation.py
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@ -360,6 +360,35 @@ class FederationHandler(BaseHandler):
# apparently.
#
# see https://github.com/matrix-org/synapse/pull/1744
#
# ----
#
# Update richvdh 2018/09/18: There are a number of problems with timing this
# request out agressively on the client side:
#
# - it plays badly with the server-side rate-limiter, which starts tarpitting you
# if you send too many requests at once, so you end up with the server carefully
# working through the backlog of your requests, which you have already timed
# out.
#
# - for this request in particular, we now (as of
# https://github.com/matrix-org/synapse/pull/3456) reject any PDUs where the
# server can't produce a plausible-looking set of prev_events - so we becone
# much more likely to reject the event.
#
# - contrary to what it says above, we do *not* fall back to fetching fresh state
# for the room if get_missing_events times out. Rather, we give up processing
# the PDU whose prevs we are missing, which then makes it much more likely that
# we'll end up back here for the *next* PDU in the list, which exacerbates the
# problem.
#
# - the agressive 10s timeout was introduced to deal with incoming federation
# requests taking 8 hours to process. It's not entirely clear why that was going
# on; certainly there were other issues causing traffic storms which are now
# resolved, and I think in any case we may be more sensible about our locking
# now. We're *certainly* more sensible about our logging.
#
# All that said: Let's try increasing the timout to 60s and see what happens.
missing_events = yield self.federation_client.get_missing_events(
origin,
@ -368,7 +397,7 @@ class FederationHandler(BaseHandler):
latest_events=[pdu],
limit=10,
min_depth=min_depth,
timeout=10000,
timeout=60000,
)
logger.info(