From 40a0ab3f484575ed2fc8a2ffa0329828a78d8539 Mon Sep 17 00:00:00 2001
From: Bo Zhou <2466956298@qq.com>
Date: Thu, 28 May 2020 10:16:36 +0800
Subject: [PATCH] Update cluster_monitor.py (#273)

---
 parl/remote/cluster_monitor.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/parl/remote/cluster_monitor.py b/parl/remote/cluster_monitor.py
index 99bc2be..b42d3ca 100644
--- a/parl/remote/cluster_monitor.py
+++ b/parl/remote/cluster_monitor.py
@@ -103,7 +103,8 @@ class ClusterMonitor(object):
             cluster_address (str): IP address of the exited client.
         """
         self.lock.acquire()
-        self.status['clients'].pop(client_address)
+        if client_address in self.status['clients']:
+            self.status['clients'].pop(client_address)
         self.lock.release()
 
     def get_status_info(self):
-- 
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