From 4d80b0e9657bed6db68debdc5aeab62121d27835 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Fri, 21 Dec 2018 17:11:52 +0100
Subject: [PATCH] RESP3: allow HELLO during busy script and not authenticated
 states.

---
 src/server.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/server.c b/src/server.c
index d85e10d95..6c7692ed7 100644
--- a/src/server.c
+++ b/src/server.c
@@ -2582,7 +2582,9 @@ int processCommand(client *c) {
     }
 
     /* Check if the user is authenticated */
-    if (server.requirepass && !c->authenticated && c->cmd->proc != authCommand)
+    if (server.requirepass &&
+        !c->authenticated &&
+        (c->cmd->proc != authCommand || c->cmd->proc == helloCommand))
     {
         flagTransaction(c);
         addReply(c,shared.noautherr);
@@ -2715,6 +2717,7 @@ int processCommand(client *c) {
     /* Lua script too slow? Only allow a limited number of commands. */
     if (server.lua_timedout &&
           c->cmd->proc != authCommand &&
+          c->cmd->proc != helloCommand &&
           c->cmd->proc != replconfCommand &&
         !(c->cmd->proc == shutdownCommand &&
           c->argc == 2 &&