Dedupe ioq_opener monitors
diff --git a/src/couch/src/couch_db.erl b/src/couch/src/couch_db.erl
index 56ad6b2..e884dda 100644
--- a/src/couch/src/couch_db.erl
+++ b/src/couch/src/couch_db.erl
@@ -248,7 +248,9 @@
monitored_by(Db) ->
case couch_db_engine:monitored_by(Db) of
- Pids when is_list(Pids) ->
+ Pids0 when is_list(Pids0) ->
+ %% Remove duplicate ioq_opener monitors
+ Pids = lists:usort(Pids0),
PidTracker = whereis(couch_stats_process_tracker),
IOQOpener = whereis(ioq_opener),
Pids -- [Db#db.main_pid, PidTracker, IOQOpener];