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Mirror von https://github.com/PaperMC/Paper.git synchronisiert 2024-12-15 02:50:09 +01:00
Paper/patches/server/0351-misc-debugging-dumps.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412)
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.
2024-09-19 16:36:07 +02:00

119 Zeilen
6.8 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Thu, 18 Feb 2021 20:23:28 +0000
Subject: [PATCH] misc debugging dumps
diff --git a/src/main/java/io/papermc/paper/util/TraceUtil.java b/src/main/java/io/papermc/paper/util/TraceUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..479bb92d159f33c54c2d9c39d8a63aa9e74d95b9
--- /dev/null
+++ b/src/main/java/io/papermc/paper/util/TraceUtil.java
@@ -0,0 +1,25 @@
+package io.papermc.paper.util;
+
+import org.bukkit.Bukkit;
+
+public final class TraceUtil {
+
+ public static void dumpTraceForThread(Thread thread, String reason) {
+ Bukkit.getLogger().warning(thread.getName() + ": " + reason);
+ StackTraceElement[] trace = StacktraceDeobfuscator.INSTANCE.deobfuscateStacktrace(thread.getStackTrace());
+ for (StackTraceElement traceElement : trace) {
+ Bukkit.getLogger().warning("\tat " + traceElement);
+ }
+ }
+
+ public static void dumpTraceForThread(String reason) {
+ final Throwable thr = new Throwable(reason);
+ StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(thr);
+ thr.printStackTrace();
+ }
+
+ public static void printStackTrace(Throwable thr) {
+ StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(thr);
+ thr.printStackTrace();
+ }
+}
diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
index e25fc35716aff1d1805884b18f67b0eb33d8c05c..8ca9ac8eff9d605baa878ca24e165ac5642bf160 100644
--- a/src/main/java/net/minecraft/commands/Commands.java
+++ b/src/main/java/net/minecraft/commands/Commands.java
@@ -340,7 +340,7 @@ public class Commands {
} catch (Exception exception) {
MutableComponent ichatmutablecomponent = Component.literal(exception.getMessage() == null ? exception.getClass().getName() : exception.getMessage());
- if (Commands.LOGGER.isDebugEnabled()) {
+ if (commandlistenerwrapper.getServer().isDebugging() || Commands.LOGGER.isDebugEnabled()) { // Paper - Debugging
Commands.LOGGER.error("Command exception: /{}", s, exception);
StackTraceElement[] astacktraceelement = exception.getStackTrace();
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 53bb62c1dcb487be915759d22e06aea80be54f36..8b17df3d18fe9acc1a7b10c6809886da0143f8c5 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -915,6 +915,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
// CraftBukkit start
private boolean hasStopped = false;
+ private boolean hasLoggedStop = false; // Paper - Debugging
private final Object stopLock = new Object();
public final boolean hasStopped() {
synchronized (this.stopLock) {
@@ -929,6 +930,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
if (this.hasStopped) return;
this.hasStopped = true;
}
+ if (!hasLoggedStop && isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread("Server stopped"); // Paper - Debugging
// CraftBukkit end
if (this.metricsRecorder.isRecording()) {
this.cancelRecordingMetrics();
@@ -1033,6 +1035,8 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
}
public void safeShutdown(boolean waitForShutdown, boolean isRestarting) {
this.isRestarting = isRestarting;
+ this.hasLoggedStop = true; // Paper - Debugging
+ if (isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread("Server stopped"); // Paper - Debugging
// Paper end
this.running = false;
if (waitForShutdown) {
diff --git a/src/main/java/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java
index 5457358bc76889153036818fdfd70a043ec4e40f..880e5c52746e9e3a9a1f42ec6461be54e3ee136c 100644
--- a/src/main/java/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java
@@ -70,6 +70,10 @@ public class ServerConfigurationPacketListenerImpl extends ServerCommonPacketLis
@Override
public void onDisconnect(DisconnectionDetails info) {
+ // Paper start - Debugging
+ if (net.minecraft.server.MinecraftServer.getServer().isDebugging()) {
+ ServerConfigurationPacketListenerImpl.LOGGER.info("{} lost connection: {}, while in configuration phase {}", this.gameProfile, info.reason().getString(), currentTask != null ? currentTask.type().id() : "null");
+ } else // Paper end
ServerConfigurationPacketListenerImpl.LOGGER.info("{} lost connection: {}", this.gameProfile, info.reason().getString());
super.onDisconnect(info);
}
@@ -169,6 +173,11 @@ public class ServerConfigurationPacketListenerImpl extends ServerCommonPacketLis
playerlist.placeNewPlayer(this.connection, entityplayer, this.createCookie(this.clientInformation));
} catch (Exception exception) {
ServerConfigurationPacketListenerImpl.LOGGER.error("Couldn't place player in world", exception);
+ // Paper start - Debugging
+ if (MinecraftServer.getServer().isDebugging()) {
+ exception.printStackTrace();
+ }
+ // Paper end - Debugging
this.connection.send(new ClientboundDisconnectPacket(ServerConfigurationPacketListenerImpl.DISCONNECT_REASON_INVALID_DATA));
this.connection.disconnect(ServerConfigurationPacketListenerImpl.DISCONNECT_REASON_INVALID_DATA);
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 01415a1523a783d8581e463dcea4f96ff8d0807e..6ea6e3280015a31a1679a874ca63c90be8252a86 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -1047,6 +1047,7 @@ public final class CraftServer implements Server {
plugin.getDescription().getFullName(),
"This plugin is not properly shutting down its async tasks when it is being reloaded. This may cause conflicts with the newly loaded version of the plugin"
));
+ if (console.isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread(worker.getThread(), "still running"); // Paper - Debugging
}
io.papermc.paper.plugin.PluginInitializerManager.reload(this.console); // Paper
this.loadPlugins();