PaperMC/patches/server/1055-Avoid-issues-with-certain-tasks-not-processing-durin.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

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Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Sun, 27 Oct 2024 14:18:28 -0700
Subject: [PATCH] Avoid issues with certain tasks not processing during sleep
Execute processQueue tasks during sleep: needed for console tab completions, pre join event, etc.
Upstream has set precedent that the bukkit scheduler will still tick during sleep, which avoids some problems
with plugins not accounting for the new sleep feature, but can still lead to others. Because of this we have disabled
sleep by default, which avoids the problem and makes it more obvious to check if this is the cause of issues when
enabled. We also unload chunks during sleep to prevent memory leaks caused by plugin chunk loads.
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index e636a96ea6220fda671a31d3d9cdea468a558768..64b56abf8900d0424100da460fc68ac964394793 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1638,6 +1638,16 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
}
this.server.getScheduler().mainThreadHeartbeat(); // CraftBukkit
+ // Paper start - avoid issues with certain tasks not processing during sleep
+ Runnable task;
+ while ((task = this.processQueue.poll()) != null) {
+ task.run();
+ }
+ for (final ServerLevel level : this.levels.values()) {
+ // process unloads
+ level.getChunkSource().tick(() -> true, false);
+ }
+ // Paper end - avoid issues with certain tasks not processing during sleep
this.server.spark.executeMainThreadTasks(); // Paper - spark
this.tickConnection();
this.server.spark.tickEnd(((double)(System.nanoTime() - lastTick) / 1000000D)); // Paper - spark
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServerProperties.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServerProperties.java
index a2633780619d73c29a23cb8b6a208ca9ba549fb0..c3ec370b83b895be0f03662e3884fa4a2442a2a6 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServerProperties.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServerProperties.java
@@ -160,7 +160,7 @@ public class DedicatedServerProperties extends Settings<DedicatedServerPropertie
this.whiteList = this.getMutable("white-list", false);
this.enforceSecureProfile = this.get("enforce-secure-profile", true);
this.logIPs = this.get("log-ips", true);
- this.pauseWhenEmptySeconds = this.get("pause-when-empty-seconds", 60);
+ this.pauseWhenEmptySeconds = this.get("pause-when-empty-seconds", -1); // Paper - disable tick sleeping by default
this.acceptsTransfers = this.get("accepts-transfers", false);
String s = this.get("level-seed", "");
boolean flag = this.get("generate-structures", true);