diff -uNr redis-6.0.9/src/networking.c redis-6.0.9.mod/src/networking.c
--- redis-6.0.9/src/networking.c	2020-10-27 07:12:01.000000000 +0000
+++ redis-6.0.9.mod/src/networking.c	2020-11-22 17:06:47.317043042 +0000
@@ -3082,16 +3082,8 @@
     int err, j;
     for (j = 0; j < server.io_threads_num; j++) {
         if (io_threads[j] == pthread_self()) continue;
-        if (io_threads[j] && pthread_cancel(io_threads[j]) == 0) {
-            if ((err = pthread_join(io_threads[j],NULL)) != 0) {
-                serverLog(LL_WARNING,
-                    "IO thread(tid:%lu) can not be joined: %s",
-                        (unsigned long)io_threads[j], strerror(err));
-            } else {
-                serverLog(LL_WARNING,
-                    "IO thread(tid:%lu) terminated",(unsigned long)io_threads[j]);
-            }
-        }
+        pthread_kill(io_threads[j], 0);
+		serverLog(LL_WARNING, "IO thread(tid:%lu) terminated",(unsigned long)io_threads[j]);
     }
 }
 
