Improve performance of "Preheating DNS cache" phase when running agai…

…nst clusters with vnodes enabled
spotify · May 5, 2020 · fd4cfdc · fd4cfdc
1 parent 3a8dd81
commit fd4cfdc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/cstar/job.py b/cstar/job.py
@@ -156,7 +156,7 @@ def create_lookup_thread(ip):
             return threading.Thread(target=lambda: get_host_by_addr(ip))
 
         print("Preheating DNS cache")
-        threads = [create_lookup_thread(ip) for ip in ips]
+        threads = [create_lookup_thread(ip) for ip in set(ips)]
 
         for thread in threads:
             thread.start()