iilyak commented on a change in pull request #2111: Fix replication
rescheduling Running < MaxJobs corner case
URL: https://github.com/apache/couchdb/pull/2111#discussion_r313810037
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File path: src/couch_replicator/src/couch_replicator_scheduler.erl
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@@ -723,49 +726,45 @@ reset_job_process(#job{} = Job) ->
-spec reschedule(#state{}) -> ok.
reschedule(State) ->
- Running = running_job_count(),
- Pending = pending_job_count(),
- stop_excess_jobs(State, Running),
- start_pending_jobs(State, Running, Pending),
- rotate_jobs(State, Running, Pending),
- update_running_jobs_stats(State#state.stats_pid),
- ok.
+ StopCount = stop_excess_jobs(State, running_job_count()),
+ rotate_jobs(State, StopCount),
+ update_running_jobs_stats(State#state.stats_pid).
--spec stop_excess_jobs(#state{}, non_neg_integer()) -> ok.
+-spec stop_excess_jobs(#state{}, non_neg_integer()) -> non_neg_integer().
stop_excess_jobs(State, Running) ->
#state{max_jobs=MaxJobs} = State,
- StopCount = Running - MaxJobs,
- if StopCount =< 0 -> ok; true ->
- Stopped = stop_jobs(StopCount, true, State),
- OneshotLeft = StopCount - Stopped,
- if OneshotLeft =< 0 -> ok; true ->
- stop_jobs(OneshotLeft, false, State),
- ok
- end
- end.
+ StopCount = max(0, Running - MaxJobs),
+ Stopped = stop_jobs(StopCount, true, State),
+ OneshotLeft = StopCount - Stopped,
Review comment:
I think we should either change this line to `max(0, StopCount - Stopped)`
or update stop_jobs to handle (return 0) negative values.
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