Github user sagelywizard commented on a diff in the pull request:
https://github.com/apache/couchdb-couch-replicator/pull/40#discussion_r66891414
--- Diff: src/couch_replicator_httpc.erl ---
@@ -251,16 +258,41 @@ clean_mailbox(_, Count) when Count > 0 ->
maybe_retry(Error, Worker, #httpdb{retries = 0} = HttpDb, Params) ->
report_error(Worker, HttpDb, Params, {error, Error});
+%% For 429 errors, we perform an exponential backoff up to 250 * 2^15
+%% times, or roughly 2.17 hours. Since the #httpd.retries is initialized
+%% to 10 and we need 15, we use the Wait time as a timeout/failure end.
+maybe_retry(backoff, Worker, #httpdb{wait = Wait} = HttpDb, Params) ->
+ ok = timer:sleep(random:uniform(Wait)),
+ Wait2 = Wait*2,
+ case Wait2 of
+ W0 when W0 >= ?MAX_BACKOFF_LOG_THRESHOLD -> % Past 8 min, we log
retries
+ log_retry_error(Params, HttpDb, Wait, "429 Retry");
--- End diff --
Don't we still need to `throw({retry...` here?
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