mirror of
https://github.com/PaperMC/Paper.git
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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.
119 lines
6.8 KiB
Diff
119 lines
6.8 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, 18 Feb 2021 20:23:28 +0000
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Subject: [PATCH] misc debugging dumps
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diff --git a/src/main/java/io/papermc/paper/util/TraceUtil.java b/src/main/java/io/papermc/paper/util/TraceUtil.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..479bb92d159f33c54c2d9c39d8a63aa9e74d95b9
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/util/TraceUtil.java
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@@ -0,0 +1,25 @@
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+package io.papermc.paper.util;
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+
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+import org.bukkit.Bukkit;
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+
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+public final class TraceUtil {
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+
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+ public static void dumpTraceForThread(Thread thread, String reason) {
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+ Bukkit.getLogger().warning(thread.getName() + ": " + reason);
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+ StackTraceElement[] trace = StacktraceDeobfuscator.INSTANCE.deobfuscateStacktrace(thread.getStackTrace());
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+ for (StackTraceElement traceElement : trace) {
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+ Bukkit.getLogger().warning("\tat " + traceElement);
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+ }
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+ }
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+
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+ public static void dumpTraceForThread(String reason) {
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+ final Throwable thr = new Throwable(reason);
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+ StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(thr);
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+ thr.printStackTrace();
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+ }
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+
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+ public static void printStackTrace(Throwable thr) {
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+ StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(thr);
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+ thr.printStackTrace();
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
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index e25fc35716aff1d1805884b18f67b0eb33d8c05c..8ca9ac8eff9d605baa878ca24e165ac5642bf160 100644
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--- a/src/main/java/net/minecraft/commands/Commands.java
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+++ b/src/main/java/net/minecraft/commands/Commands.java
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@@ -340,7 +340,7 @@ public class Commands {
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} catch (Exception exception) {
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MutableComponent ichatmutablecomponent = Component.literal(exception.getMessage() == null ? exception.getClass().getName() : exception.getMessage());
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- if (Commands.LOGGER.isDebugEnabled()) {
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+ if (commandlistenerwrapper.getServer().isDebugging() || Commands.LOGGER.isDebugEnabled()) { // Paper - Debugging
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Commands.LOGGER.error("Command exception: /{}", s, exception);
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StackTraceElement[] astacktraceelement = exception.getStackTrace();
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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 53bb62c1dcb487be915759d22e06aea80be54f36..8b17df3d18fe9acc1a7b10c6809886da0143f8c5 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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@@ -915,6 +915,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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// CraftBukkit start
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private boolean hasStopped = false;
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+ private boolean hasLoggedStop = false; // Paper - Debugging
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private final Object stopLock = new Object();
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public final boolean hasStopped() {
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synchronized (this.stopLock) {
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@@ -929,6 +930,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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if (this.hasStopped) return;
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this.hasStopped = true;
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}
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+ if (!hasLoggedStop && isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread("Server stopped"); // Paper - Debugging
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// CraftBukkit end
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if (this.metricsRecorder.isRecording()) {
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this.cancelRecordingMetrics();
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@@ -1033,6 +1035,8 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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}
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public void safeShutdown(boolean waitForShutdown, boolean isRestarting) {
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this.isRestarting = isRestarting;
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+ this.hasLoggedStop = true; // Paper - Debugging
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+ if (isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread("Server stopped"); // Paper - Debugging
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// Paper end
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this.running = false;
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if (waitForShutdown) {
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diff --git a/src/main/java/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java
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index 5457358bc76889153036818fdfd70a043ec4e40f..880e5c52746e9e3a9a1f42ec6461be54e3ee136c 100644
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--- a/src/main/java/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerConfigurationPacketListenerImpl.java
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@@ -70,6 +70,10 @@ public class ServerConfigurationPacketListenerImpl extends ServerCommonPacketLis
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@Override
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public void onDisconnect(DisconnectionDetails info) {
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+ // Paper start - Debugging
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+ if (net.minecraft.server.MinecraftServer.getServer().isDebugging()) {
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+ ServerConfigurationPacketListenerImpl.LOGGER.info("{} lost connection: {}, while in configuration phase {}", this.gameProfile, info.reason().getString(), currentTask != null ? currentTask.type().id() : "null");
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+ } else // Paper end
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ServerConfigurationPacketListenerImpl.LOGGER.info("{} lost connection: {}", this.gameProfile, info.reason().getString());
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super.onDisconnect(info);
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}
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@@ -169,6 +173,11 @@ public class ServerConfigurationPacketListenerImpl extends ServerCommonPacketLis
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playerlist.placeNewPlayer(this.connection, entityplayer, this.createCookie(this.clientInformation));
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} catch (Exception exception) {
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ServerConfigurationPacketListenerImpl.LOGGER.error("Couldn't place player in world", exception);
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+ // Paper start - Debugging
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+ if (MinecraftServer.getServer().isDebugging()) {
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+ exception.printStackTrace();
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+ }
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+ // Paper end - Debugging
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this.connection.send(new ClientboundDisconnectPacket(ServerConfigurationPacketListenerImpl.DISCONNECT_REASON_INVALID_DATA));
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this.connection.disconnect(ServerConfigurationPacketListenerImpl.DISCONNECT_REASON_INVALID_DATA);
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index 01415a1523a783d8581e463dcea4f96ff8d0807e..6ea6e3280015a31a1679a874ca63c90be8252a86 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -1047,6 +1047,7 @@ public final class CraftServer implements Server {
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plugin.getDescription().getFullName(),
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"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"
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));
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+ if (console.isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread(worker.getThread(), "still running"); // Paper - Debugging
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}
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io.papermc.paper.plugin.PluginInitializerManager.reload(this.console); // Paper
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this.loadPlugins();
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