Fix some issues

gunicorn.conf.py

@@ -12,8 +12,21 @@ worker_connections= 2000
 timeout           = 300
 keepalive         = 75
 
-# Preloading ensures eventlet.monkey_patch() in run.py runs once before fork
-preload_app       = True
+# preload_app must be False with the eventlet worker.
+#
+# With preload_app = True, gunicorn loads the WSGI app in the master process
+# before forking workers. At that point gunicorn's own internals have already
+# imported `logging` and other stdlib modules, creating real OS RLocks.
+# The eventlet worker calls eventlet.monkey_patch() at its own import time —
+# but that import happens *after* the master has already loaded the app, so
+# the patch arrives too late and eventlet emits:
+#   "1 RLock(s) were not greened"
+#
+# With preload_app = False, workers are forked first. The eventlet worker
+# module is imported inside each worker process, its module-level
+# monkey_patch() fires before the app is loaded, and all subsequent imports
+# (including logging) get the green versions from the start.
+preload_app       = False
 
 # Application
 wsgi_app          = "run:app"