Updated Upstream (Paper)

Upstream has released updates that appear to apply and compile correctly

Paper Changes:
PaperMC/Paper@e4a5a894 Update to Minecraft 26.1.1
PaperMC/Paper@92a4d8db Update "Only write chunk data to disk if it serializes without throwing"
PaperMC/Paper@02d9cbce Update "Entity load/save limit per chunk"
PaperMC/Paper@cb696286 Update "Attempt to recalculate regionfile header if it is corrupt"
PaperMC/Paper@4662bab9 Update "Incremental chunk and player saving"
PaperMC/Paper@4dddc82f Implement new version schema: `<mcver>.build.<paper_build_no>-<paper_status>` / `<mcver>.local-SNAPSHOT`
PaperMC/Paper@fc0a9980 Set channel to ALPHA
PaperMC/Paper@a4fa0357 update gradle wrapper
PaperMC/Paper@a15ceb7a Update fill-gradle to 1.0.11
PaperMC/Paper@52f7e24e Publish to releases repository
PaperMC/Paper@bb7ff8f0 Update "Optimise general POI access"
PaperMC/Paper@ac42a07e Update "Flush regionfiles on save configuration option"
PaperMC/Paper@14357cc5 Avoid using the regionfile directory name to determine if it is chunk data
PaperMC/Paper@a2f4d349 Update "Optimise collision checking in player move packet handling"
PaperMC/Paper@50303a0e Update "Add explicit flush support to Log4j AsyncAppender"
PaperMC/Paper@7bc4f895 Shift unapplied patches
PaperMC/Paper@62ba2c4f Update "Improve keepalive ping system"
PaperMC/Paper@f6d27019 Update "Optimise EntityScheduler ticking"
PaperMC/Paper@4d8d06c7 Fix WorldBorder#setCenter ignoring new values on 26.1.1 (#13741)
PaperMC/Paper@f9da8035 update unpick definitions
PaperMC/Paper@fc71a133 [ci/skip] fixup previous commit
PaperMC/Paper@4c91cd34 Lazy set Entity.projectileSource in AbstractProjectile#getShooter
PaperMC/Paper@3d1da60c Cache the climbing check in activation range (#12764)
PaperMC/Paper@575630f3 feat: Optimize ServerWaypointManager when locator bar is disabled
PaperMC/Paper@742daf02 [ci/skip] fixup previous commit
PaperMC/Paper@d29063da Rebuild patches
PaperMC/Paper@ce581c3c Bump deps to match Vanilla versions (#13744)
PaperMC/Paper@f3e9a934 Fix attack check
PaperMC/Paper@b4743b58 Fix gamerule loading in Management Protocol (#13753)
PaperMC/Paper@c53ac8a1 Add PlayerToggleEntityAgeLockEvent (#13742)
PaperMC/Paper@59081719 fixup previous event
PaperMC/Paper@7b49b586 Update "Optional per player mob spawns"
PaperMC/Paper@1fae14c2 Update "Improve cancelling PreCreatureSpawnEvent with per player mob spawns"
PaperMC/Paper@c40cb75b Update "Optimize Hoppers"
PaperMC/Paper@edad1e4c Update "Anti-Xray"
PaperMC/Paper@106a934d [ci/skip] Drop stale TODO
PaperMC/Paper@77c0866f handle legacy uid in vanilla migration and always write metadata during migration

purpur-server/minecraft-patches/unapplied-features/0022-Alternative-Keepalive-Handling-for-Improved-Keepaliv.patch

@@ -1,67 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: granny <contact@granny.dev>
-Date: Mon, 23 Mar 2026 17:48:11 -0700
-Subject: [PATCH] Alternative Keepalive Handling for Improved Keepalive Ping
- System
-
-
-diff --git a/net/minecraft/server/network/ServerCommonPacketListenerImpl.java b/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
-index b8a4b4cc02a2fc6b70f4b840796eed501aad6239..02c6733ce1de543dab3bf558148879039e501257 100644
---- a/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
-+++ b/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
-@@ -40,10 +40,11 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
-     public final Connection connection; // Paper
-     private final boolean transferred;
-     //private long keepAliveTime; // Paper - improve keepalives
--    //private boolean keepAlivePending; // Paper - improve keepalives
-+    private boolean keepAlivePending; // Paper - improve keepalives // Purpur - Alternative Keepalive Handling
-     //private long keepAliveChallenge; // Paper - improve keepalives
-     private long closedListenerTime;
-     private boolean closed = false;
-+    private it.unimi.dsi.fastutil.longs.LongList keepAlives = new it.unimi.dsi.fastutil.longs.LongArrayList(); // Purpur - Alternative Keepalive Handling
-     private volatile int latency; // Paper - improve keepalives - make volatile
-     private final io.papermc.paper.util.KeepAlive keepAlive; // Paper - improve keepalives
-     private volatile boolean suspendFlushingOnServerThread = false;
-@@ -105,6 +110,18 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
-         // Paper start - improve keepalives
-         long now = System.nanoTime();
-         io.papermc.paper.util.KeepAlive.PendingKeepAlive pending = this.keepAlive.pendingKeepAlives.peek();
-+        // Purpur start - Alternative Keepalive Handling
-+        if (org.purpurmc.purpur.PurpurConfig.useAlternateKeepAlive) {
-+            if (this.keepAlivePending && !keepAlives.isEmpty() && keepAlives.contains(packet.getId())) {
-+                int ping = (int) (Util.getMillis() - packet.getId());
-+                int updatedLatency = (this.latency * 3 + ping) / 4;
-+                this.latency = updatedLatency;
-+                this.keepAlivePending = false;
-+                keepAlives.clear(); // we got a valid response, lets roll with it and forget the rest
-+            }
-+            return;
-+        } else
-+        // Purpur end - Alternative Keepalive Handling
-         if (pending != null && pending.challengeId() == packet.getId()) {
-             this.keepAlive.pendingKeepAlives.remove(pending);
- 
-@@ -264,6 +287,23 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
-         Profiler.get().push("keepAlive");
-         long millis = Util.getMillis();
-         // Paper start - improve keepalives
-+        // Purpur start - Alternative Keepalive Handling
-+        if (org.purpurmc.purpur.PurpurConfig.useAlternateKeepAlive) {
-+            if (this.checkIfClosed(millis) && !this.processedDisconnect) {
-+                long currTime = System.nanoTime();
-+                if ((currTime - this.keepAlive.lastKeepAliveTx) >= java.util.concurrent.TimeUnit.SECONDS.toNanos(1L)) { // 1 second
-+                    this.keepAlive.lastKeepAliveTx = currTime;
-+                    if (this.keepAlivePending && !this.processedDisconnect && keepAlives.size() * 1000L >= KEEPALIVE_LIMIT) {
-+                        this.disconnect(TIMEOUT_DISCONNECTION_MESSAGE, io.papermc.paper.connection.DisconnectionReason.TIMEOUT);
-+                    } else if (this.checkIfClosed(millis)) {
-+                        this.keepAlivePending = true;
-+                        this.keepAlives.add(millis); // currentTime is ID
-+                        this.send(new ClientboundKeepAlivePacket(millis));
-+                    }
-+                }
-+            }
-+        } else
-+        // Purpur end - Alternative Keepalive Handling
-         if (this.checkIfClosed(millis) && !this.processedDisconnect) {
-             long currTime = System.nanoTime();
-