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Paper/patches/server/1043-Detail-more-information-in-watchdog-dumps.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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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Thu, 26 Mar 2020 21:59:32 -0700
Subject: [PATCH] Detail more information in watchdog dumps
- Dump position, world, velocity, and uuid for currently ticking entities
- Dump player name, player uuid, position, and world for packet handling
Feature patch
diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
index d18af548fa6e979267347443b61efc58b271dfcf..e693a003ea8f022eef8b49e4332025b769333b30 100644
--- a/src/main/java/net/minecraft/network/Connection.java
+++ b/src/main/java/net/minecraft/network/Connection.java
@@ -632,7 +632,13 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
if (!(this.packetListener instanceof net.minecraft.server.network.ServerLoginPacketListenerImpl loginPacketListener)
|| loginPacketListener.state != net.minecraft.server.network.ServerLoginPacketListenerImpl.State.VERIFYING
|| Connection.joinAttemptsThisTick++ < MAX_PER_TICK) {
+ // Paper start - detailed watchdog information
+ net.minecraft.network.protocol.PacketUtils.packetProcessing.push(this.packetListener);
+ try {
tickablepacketlistener.tick();
+ } finally {
+ net.minecraft.network.protocol.PacketUtils.packetProcessing.pop();
+ } // Paper end - detailed watchdog information
} // Paper end - Buffer joins to world
}
diff --git a/src/main/java/net/minecraft/network/protocol/PacketUtils.java b/src/main/java/net/minecraft/network/protocol/PacketUtils.java
index f7197f1347251a37dd0f6d9ffa2f09bc3a4e1233..1f7f68aad97ee73763c042837f239bdc7167db55 100644
--- a/src/main/java/net/minecraft/network/protocol/PacketUtils.java
+++ b/src/main/java/net/minecraft/network/protocol/PacketUtils.java
@@ -20,6 +20,24 @@ public class PacketUtils {
private static final Logger LOGGER = LogUtils.getLogger();
+ // Paper start - detailed watchdog information
+ public static final java.util.concurrent.ConcurrentLinkedDeque<PacketListener> packetProcessing = new java.util.concurrent.ConcurrentLinkedDeque<>();
+ static final java.util.concurrent.atomic.AtomicLong totalMainThreadPacketsProcessed = new java.util.concurrent.atomic.AtomicLong();
+
+ public static long getTotalProcessedPackets() {
+ return totalMainThreadPacketsProcessed.get();
+ }
+
+ public static java.util.List<PacketListener> getCurrentPacketProcessors() {
+ java.util.List<PacketListener> ret = new java.util.ArrayList<>(4);
+ for (PacketListener listener : packetProcessing) {
+ ret.add(listener);
+ }
+
+ return ret;
+ }
+ // Paper end - detailed watchdog information
+
public PacketUtils() {}
public static <T extends PacketListener> void ensureRunningOnSameThread(Packet<T> packet, T listener, ServerLevel world) throws RunningOnDifferentThreadException {
@@ -29,6 +47,8 @@ public class PacketUtils {
public static <T extends PacketListener> void ensureRunningOnSameThread(Packet<T> packet, T listener, BlockableEventLoop<?> engine) throws RunningOnDifferentThreadException {
if (!engine.isSameThread()) {
engine.executeIfPossible(() -> {
+ packetProcessing.push(listener); // Paper - detailed watchdog information
+ try { // Paper - detailed watchdog information
if (listener instanceof ServerCommonPacketListenerImpl serverCommonPacketListener && serverCommonPacketListener.processedDisconnect) return; // CraftBukkit - Don't handle sync packets for kicked players
if (listener.shouldHandleMessage(packet)) {
try {
@@ -47,6 +67,12 @@ public class PacketUtils {
} else {
PacketUtils.LOGGER.debug("Ignoring packet due to disconnection: {}", packet);
}
+ // Paper start - detailed watchdog information
+ } finally {
+ totalMainThreadPacketsProcessed.getAndIncrement();
+ packetProcessing.pop();
+ }
+ // Paper end - detailed watchdog information
});
throw RunningOnDifferentThreadException.RUNNING_ON_DIFFERENT_THREAD;
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 85c58214c13208ed30f0ae4a2722f172184123ab..ff79925649ac1ceb6121c4b74fdb65f5f138f689 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -1253,7 +1253,26 @@ public class ServerLevel extends Level implements ServerEntityGetter, WorldGenLe
}
+ // Paper start - log detailed entity tick information
+ // TODO replace with varhandle
+ static final java.util.concurrent.atomic.AtomicReference<Entity> currentlyTickingEntity = new java.util.concurrent.atomic.AtomicReference<>();
+
+ public static List<Entity> getCurrentlyTickingEntities() {
+ Entity ticking = currentlyTickingEntity.get();
+ List<Entity> ret = java.util.Arrays.asList(ticking == null ? new Entity[0] : new Entity[] { ticking });
+
+ return ret;
+ }
+ // Paper end - log detailed entity tick information
+
public void tickNonPassenger(Entity entity) {
+ // Paper start - log detailed entity tick information
+ ca.spottedleaf.moonrise.common.util.TickThread.ensureTickThread("Cannot tick an entity off-main");
+ try {
+ if (currentlyTickingEntity.get() == null) {
+ currentlyTickingEntity.lazySet(entity);
+ }
+ // Paper end - log detailed entity tick information
// Spigot start
/*if (!org.spigotmc.ActivationRange.checkIfActive(entity)) { // Paper - comment out EAR 2
entity.tickCount++;
@@ -1283,6 +1302,13 @@ public class ServerLevel extends Level implements ServerEntityGetter, WorldGenLe
this.tickPassenger(entity, entity1, isActive); // Paper - EAR 2
}
+ // Paper start - log detailed entity tick information
+ } finally {
+ if (currentlyTickingEntity.get() == entity) {
+ currentlyTickingEntity.lazySet(null);
+ }
+ }
+ // Paper end - log detailed entity tick information
}
private void tickPassenger(Entity vehicle, Entity passenger, boolean isActive) { // Paper - EAR 2
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index a9e1ae7ad0b81e7488cb07876b32d7ba0a170365..8be1b051543cda2b2e9e3d337834757e53f442de 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -1172,8 +1172,43 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
return this.onGround;
}
+ // Paper start - detailed watchdog information
+ public final Object posLock = new Object(); // Paper - log detailed entity tick information
+
+ private Vec3 moveVector;
+ private double moveStartX;
+ private double moveStartY;
+ private double moveStartZ;
+
+ public final Vec3 getMoveVector() {
+ return this.moveVector;
+ }
+
+ public final double getMoveStartX() {
+ return this.moveStartX;
+ }
+
+ public final double getMoveStartY() {
+ return this.moveStartY;
+ }
+
+ public final double getMoveStartZ() {
+ return this.moveStartZ;
+ }
+ // Paper end - detailed watchdog information
+
public void move(MoverType type, Vec3 movement) {
final Vec3 originalMovement = movement; // Paper - Expose pre-collision velocity
+ // Paper start - detailed watchdog information
+ ca.spottedleaf.moonrise.common.util.TickThread.ensureTickThread("Cannot move an entity off-main");
+ synchronized (this.posLock) {
+ this.moveStartX = this.getX();
+ this.moveStartY = this.getY();
+ this.moveStartZ = this.getZ();
+ this.moveVector = movement;
+ }
+ try {
+ // Paper end - detailed watchdog information
if (this.noPhysics) {
this.setPos(this.getX() + movement.x, this.getY() + movement.y, this.getZ() + movement.z);
} else {
@@ -1294,6 +1329,13 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
gameprofilerfiller.pop();
}
}
+ // Paper start - detailed watchdog information
+ } finally {
+ synchronized (this.posLock) { // Paper
+ this.moveVector = null;
+ } // Paper
+ }
+ // Paper end - detailed watchdog information
}
private void applyMovementEmissionAndPlaySound(Entity.MovementEmission moveEffect, Vec3 movement, BlockPos landingPos, BlockState landingState) {
@@ -4916,7 +4958,9 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
}
public void setDeltaMovement(Vec3 velocity) {
+ synchronized (this.posLock) { // Paper
this.deltaMovement = velocity;
+ } // Paper
}
public void addDeltaMovement(Vec3 velocity) {
@@ -5022,7 +5066,9 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
}
// Paper end - Fix MC-4
if (this.position.x != x || this.position.y != y || this.position.z != z) {
+ synchronized (this.posLock) { // Paper
this.position = new Vec3(x, y, z);
+ } // Paper
int i = Mth.floor(x);
int j = Mth.floor(y);
int k = Mth.floor(z);
diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java
index c9e17225bc52fe5e7b2dc0908db225a86c6e94d1..f7a4fee9bb25ff256dc2e5ea26bfbceca6a49167 100644
--- a/src/main/java/org/spigotmc/WatchdogThread.java
+++ b/src/main/java/org/spigotmc/WatchdogThread.java
@@ -22,6 +22,78 @@ public class WatchdogThread extends ca.spottedleaf.moonrise.common.util.TickThre
private volatile long lastTick;
private volatile boolean stopping;
+ // Paper start - log detailed tick information
+ private void dumpEntity(net.minecraft.world.entity.Entity entity) {
+ Logger log = Bukkit.getServer().getLogger();
+ double posX, posY, posZ;
+ net.minecraft.world.phys.Vec3 mot;
+ double moveStartX, moveStartY, moveStartZ;
+ net.minecraft.world.phys.Vec3 moveVec;
+ synchronized (entity.posLock) {
+ posX = entity.getX();
+ posY = entity.getY();
+ posZ = entity.getZ();
+ mot = entity.getDeltaMovement();
+ moveStartX = entity.getMoveStartX();
+ moveStartY = entity.getMoveStartY();
+ moveStartZ = entity.getMoveStartZ();
+ moveVec = entity.getMoveVector();
+ }
+
+ String entityType = net.minecraft.world.entity.EntityType.getKey(entity.getType()).toString();
+ java.util.UUID entityUUID = entity.getUUID();
+ net.minecraft.world.level.Level world = entity.level();
+
+ log.log(Level.SEVERE, "Ticking entity: " + entityType + ", entity class: " + entity.getClass().getName());
+ log.log(Level.SEVERE, "Entity status: removed: " + entity.isRemoved() + ", valid: " + entity.valid + ", alive: " + entity.isAlive() + ", is passenger: " + entity.isPassenger());
+ log.log(Level.SEVERE, "Entity UUID: " + entityUUID);
+ log.log(Level.SEVERE, "Position: world: '" + (world == null ? "unknown world?" : world.getWorld().getName()) + "' at location (" + posX + ", " + posY + ", " + posZ + ")");
+ log.log(Level.SEVERE, "Velocity: " + (mot == null ? "unknown velocity" : mot.toString()) + " (in blocks per tick)");
+ log.log(Level.SEVERE, "Entity AABB: " + entity.getBoundingBox());
+ if (moveVec != null) {
+ log.log(Level.SEVERE, "Move call information: ");
+ log.log(Level.SEVERE, "Start position: (" + moveStartX + ", " + moveStartY + ", " + moveStartZ + ")");
+ log.log(Level.SEVERE, "Move vector: " + moveVec.toString());
+ }
+ }
+
+ private void dumpTickingInfo() {
+ Logger log = Bukkit.getServer().getLogger();
+
+ // ticking entities
+ for (net.minecraft.world.entity.Entity entity : net.minecraft.server.level.ServerLevel.getCurrentlyTickingEntities()) {
+ this.dumpEntity(entity);
+ net.minecraft.world.entity.Entity vehicle = entity.getVehicle();
+ if (vehicle != null) {
+ log.log(Level.SEVERE, "Detailing vehicle for above entity:");
+ this.dumpEntity(vehicle);
+ }
+ }
+
+ // packet processors
+ for (net.minecraft.network.PacketListener packetListener : net.minecraft.network.protocol.PacketUtils.getCurrentPacketProcessors()) {
+ if (packetListener instanceof net.minecraft.server.network.ServerGamePacketListenerImpl) {
+ net.minecraft.server.level.ServerPlayer player = ((net.minecraft.server.network.ServerGamePacketListenerImpl)packetListener).player;
+ long totalPackets = net.minecraft.network.protocol.PacketUtils.getTotalProcessedPackets();
+ if (player == null) {
+ log.log(Level.SEVERE, "Handling packet for player connection or ticking player connection (null player): " + packetListener);
+ log.log(Level.SEVERE, "Total packets processed on the main thread for all players: " + totalPackets);
+ } else {
+ this.dumpEntity(player);
+ net.minecraft.world.entity.Entity vehicle = player.getVehicle();
+ if (vehicle != null) {
+ log.log(Level.SEVERE, "Detailing vehicle for above entity:");
+ this.dumpEntity(vehicle);
+ }
+ log.log(Level.SEVERE, "Total packets processed on the main thread for all players: " + totalPackets);
+ }
+ } else {
+ log.log(Level.SEVERE, "Handling packet for connection: " + packetListener);
+ }
+ }
+ }
+ // Paper end - log detailed tick information
+
private WatchdogThread(long timeoutTime, boolean restart)
{
super( "Paper Watchdog Thread" );
@@ -119,6 +191,7 @@ public class WatchdogThread extends ca.spottedleaf.moonrise.common.util.TickThre
log.log( Level.SEVERE, "------------------------------" );
log.log( Level.SEVERE, "Server thread dump (Look for plugins here before reporting to Paper!):" ); // Paper
ca.spottedleaf.moonrise.patches.chunk_system.scheduling.ChunkTaskScheduler.dumpAllChunkLoadInfo(MinecraftServer.getServer(), isLongTimeout); // Paper - rewrite chunk system
+ this.dumpTickingInfo(); // Paper - log detailed tick information
WatchdogThread.dumpThread( ManagementFactory.getThreadMXBean().getThreadInfo( MinecraftServer.getServer().serverThread.getId(), Integer.MAX_VALUE ), log );
log.log( Level.SEVERE, "------------------------------" );
//
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