Paper/Spigot-Server-Patches/0239-Disable-Explicit-Network-Manager-Flushing.patch

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From 436b8ca65261831566f75fcc279c317e6544ee73 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 11 Mar 2018 14:13:33 -0400
2018-03-11 19:21:03 +01:00
Subject: [PATCH] Disable Explicit Network Manager Flushing
This seems completely pointless, as packet dispatch uses .writeAndFlush.
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Things seem to work fine without explicit flushing, but incase issues arise,
provide a System property to re-enable it using improved logic of doing the
flushing on the netty event loop, so it won't do the flush on the main thread.
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Renable flushing by passing -Dpaper.explicit-flush=true
diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
index 4f3f88ff66..f8facddb40 100644
--- a/src/main/java/net/minecraft/server/NetworkManager.java
+++ b/src/main/java/net/minecraft/server/NetworkManager.java
@@ -66,6 +66,7 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
// Paper start - NetworkClient implementation
public int protocolVersion;
public java.net.InetSocketAddress virtualHost;
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+ private static boolean enableExplicitFlush = Boolean.getBoolean("paper.explicit-flush");
// Paper end
public NetworkManager(EnumProtocolDirection enumprotocoldirection) {
@@ -238,7 +239,7 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
}
if (this.channel != null) {
- this.channel.flush();
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+ if (enableExplicitFlush) this.channel.eventLoop().execute(() -> this.channel.flush()); // Paper - we don't need to explicit flush here, but allow opt in incase issues are found to a better version
}
if (this.u++ % 20 == 0) {
--
2.18.0