Allow SHUTDOWN in loading state.

src/db.c

@@ -362,6 +362,12 @@ void shutdownCommand(redisClient *c) {
             return;
         }
     }
+    /* SHUTDOWN can be called even while the server is in "loading" state.
+     * When this happens we need to make sure no attempt is performed to save
+     * the dataset on shutdown (otherwise it could overwrite the current DB
+     * with half-read data). */
+    if (server.loading)
+        flags = (flags & ~REDIS_SHUTDOWN_SAVE) | REDIS_SHUTDOWN_NOSAVE;
     if (prepareForShutdown(flags) == REDIS_OK) exit(0);
     addReplyError(c,"Errors trying to SHUTDOWN. Check logs.");
 }

src/redis.c

@@ -215,7 +215,7 @@ struct redisCommand redisCommandTable[] = {
     {"save",saveCommand,1,"ars",0,NULL,0,0,0,0,0},
     {"bgsave",bgsaveCommand,1,"ar",0,NULL,0,0,0,0,0},
     {"bgrewriteaof",bgrewriteaofCommand,1,"ar",0,NULL,0,0,0,0,0},
-    {"shutdown",shutdownCommand,-1,"ar",0,NULL,0,0,0,0,0},
+    {"shutdown",shutdownCommand,-1,"arl",0,NULL,0,0,0,0,0},
     {"lastsave",lastsaveCommand,1,"rR",0,NULL,0,0,0,0,0},
     {"type",typeCommand,2,"r",0,NULL,1,1,1,0,0},
     {"multi",multiCommand,1,"rs",0,NULL,0,0,0,0,0},