PaperMC/patches/server/0101-Don-t-lookup-game-profiles-that-have-no-UUID-and-no-.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Sat, 16 Jul 2016 19:11:17 -0500
Subject: [PATCH] Don't lookup game profiles that have no UUID and no name


diff --git a/src/main/java/net/minecraft/server/players/GameProfileCache.java b/src/main/java/net/minecraft/server/players/GameProfileCache.java
index 548627b5a12e79ac31136b2695e45f9452115348..7ef77c38537b85deb7d388a7331e895c54a8ba95 100644
--- a/src/main/java/net/minecraft/server/players/GameProfileCache.java
+++ b/src/main/java/net/minecraft/server/players/GameProfileCache.java
@@ -101,7 +101,7 @@ public class GameProfileCache {
         repository.findProfilesByNames(new String[]{name}, Agent.MINECRAFT, profilelookupcallback);
         GameProfile gameprofile = (GameProfile) atomicreference.get();
 
-        if (!GameProfileCache.usesAuthentication() && gameprofile == null) {
+        if (!GameProfileCache.usesAuthentication() && gameprofile == null && !org.apache.commons.lang3.StringUtils.isBlank(name)) { // Paper - Don't lookup a profile with a blank name
             UUID uuid = Player.createPlayerUUID(new GameProfile((UUID) null, name));
 
             return Optional.of(new GameProfile(uuid, name));