Force tinyprotocol injection

SpigotCore_Main/src/com/comphenix/tinyprotocol/TinyProtocol.java

@@ -92,15 +92,18 @@ public class TinyProtocol {
 
 			@EventHandler(priority = EventPriority.LOWEST)
 			public void onPlayerLogin(PlayerLoginEvent e) {
-				if (closed)
-					return;
-
-				Channel channel = getChannel(e.getPlayer());
-
-				// Don't inject players that have been explicitly uninjected
-				if (!uninjectedChannels.contains(channel)) {
-					injectPlayer(e.getPlayer());
-				}
+				injectPlayerOnLogin(
+						e.getPlayer(),
+						() -> Bukkit.getScheduler().runTask(plugin, () -> injectPlayerOnLogin(
+								e.getPlayer(),
+								() -> Bukkit.getScheduler().runTaskLater(plugin, () -> injectPlayerOnLogin(
+										e.getPlayer(),
+										() -> {
+											//Give up
+										}
+								), 1)
+						))
+				);
 			}
 
 			@EventHandler
@@ -130,6 +133,23 @@ public class TinyProtocol {
 		}
 	}
 
+	private void injectPlayerOnLogin(Player player, Runnable errorHandler) {
+		if (closed)
+			return;
+
+		try {
+			Channel channel = getChannel(player);
+
+			// Don't inject players that have been explicitly uninjected
+			if (!uninjectedChannels.contains(channel)) {
+				injectPlayer(player);
+			}
+		} catch (NullPointerException ex) {
+			Bukkit.getLogger().log(Level.WARNING, player.getName() + " without playerConnection, retrying");
+			errorHandler.run();
+		}
+	}
+
 	private void createServerChannelHandler() {
 		// Handle connected channels
 		endInitProtocol = new ChannelInitializer<Channel>() {