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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
62 lines
3.3 KiB
Diff
62 lines
3.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Thu, 11 Apr 2024 16:37:44 +0100
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Subject: [PATCH] Fix premature player kicks on shutdown
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When the server is stopping, the default execution handler method will throw a
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RejectedExecutionException in order to prevent further execution, this causes
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us to lose the actual kick reason. To mitigate this, we'll use a seperate marked
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class in order to gracefully ignore these.
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diff --git a/src/main/java/io/papermc/paper/util/ServerStopRejectedExecutionException.java b/src/main/java/io/papermc/paper/util/ServerStopRejectedExecutionException.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..2c5cd77103c5a33d4349ab6b9ee2d8378bb60eb4
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/util/ServerStopRejectedExecutionException.java
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@@ -0,0 +1,20 @@
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+package io.papermc.paper.util;
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+
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+import java.util.concurrent.RejectedExecutionException;
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+
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+public class ServerStopRejectedExecutionException extends RejectedExecutionException {
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+ public ServerStopRejectedExecutionException() {
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+ }
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+
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+ public ServerStopRejectedExecutionException(final String message) {
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+ super(message);
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+ }
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+
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+ public ServerStopRejectedExecutionException(final String message, final Throwable cause) {
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+ super(message, cause);
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+ }
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+
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+ public ServerStopRejectedExecutionException(final Throwable cause) {
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+ super(cause);
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
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index 4d9f1fc884050993287adfa4578a87da710623fb..a8dfe7a4b3d01bf75587be078f471d1ef1d7a667 100644
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--- a/src/main/java/net/minecraft/network/Connection.java
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+++ b/src/main/java/net/minecraft/network/Connection.java
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@@ -285,6 +285,7 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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Connection.genericsFtw(packet, packetlistener);
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} catch (RunningOnDifferentThreadException cancelledpackethandleexception) {
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;
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+ } catch (io.papermc.paper.util.ServerStopRejectedExecutionException ignored) { // Paper - do not prematurely disconnect players on stop
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} catch (RejectedExecutionException rejectedexecutionexception) {
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this.disconnect((Component) Component.translatable("multiplayer.disconnect.server_shutdown"));
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} catch (ClassCastException classcastexception) {
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index bef05e09c654794405832ad75c3471f63399dfee..2cc22a9a5483c62cdf64870f5ce62b33018bef06 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -2091,7 +2091,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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@Override
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public void executeIfPossible(Runnable runnable) {
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if (this.isStopped()) {
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- throw new RejectedExecutionException("Server already shutting down");
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+ throw new io.papermc.paper.util.ServerStopRejectedExecutionException("Server already shutting down"); // Paper - do not prematurely disconnect players on stop
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} else {
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super.executeIfPossible(runnable);
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}
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