From c8c4832794c42ae67f0d57590fdb90a458653d51 Mon Sep 17 00:00:00 2001
From: raoul-khour-ts <69156393+raoul-khour-ts@users.noreply.github.com>
Date: Mon, 24 Aug 2020 15:29:55 -0400
Subject: [PATCH] Prevent Local Worker creation from blocking remote worker
 creation by creating remote workers before local worker (#10245)

* create remote workers before local worker

* reformatted
---
 rllib/evaluation/worker_set.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/rllib/evaluation/worker_set.py b/rllib/evaluation/worker_set.py
index d79e0c4f1..ffa10a2e8 100644
--- a/rllib/evaluation/worker_set.py
+++ b/rllib/evaluation/worker_set.py
@@ -64,15 +64,15 @@ class WorkerSet:
                 trainer_config,
                 {"tf_session_args": trainer_config["local_tf_session_args"]})
 
+            # Create a number of remote workers
+            self._remote_workers = []
+            self.add_workers(num_workers)
+
             # Always create a local worker
             self._local_worker = self._make_worker(RolloutWorker, env_creator,
                                                    self._policy_class, 0,
                                                    self._local_config)
 
-            # Create a number of remote workers
-            self._remote_workers = []
-            self.add_workers(num_workers)
-
     def local_worker(self) -> RolloutWorker:
         """Return the local rollout worker."""
         return self._local_worker