Paper/patches/server/0395-misc-debugging-dumps.patch

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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..2d5494d2813b773e60ddba6790b750a9a08f21f8
--- /dev/null
+++ b/src/main/java/io/papermc/paper/util/TraceUtil.java
@@ -0,0 +1,18 @@
+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 = thread.getStackTrace();
+ for (StackTraceElement traceElement : trace) {
+ Bukkit.getLogger().warning("\tat " + traceElement);
+ }
+ }
+
+ public static void dumpTraceForThread(String reason) {
+ new Throwable(reason).printStackTrace();
+ }
+}
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 d406df9626d29ee257b8eedcbea2af09ed4b6baf..366959f9841eb0ef3669b3b3b069d7670f0ba7e6 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -889,6 +889,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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// CraftBukkit start
private boolean hasStopped = false;
public volatile boolean hasFullyShutdown = false; // Paper
+ private boolean hasLoggedStop = false; // Paper
private final Object stopLock = new Object();
public final boolean hasStopped() {
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synchronized (this.stopLock) {
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@@ -903,6 +904,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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if (this.hasStopped) return;
this.hasStopped = true;
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}
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+ if (!hasLoggedStop && isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread("Server stopped"); // Paper
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// Paper start - kill main thread, and kill it hard
shutdownThread = Thread.currentThread();
org.spigotmc.WatchdogThread.doStop(); // Paper
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@@ -1004,6 +1006,8 @@ 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;
+ this.hasLoggedStop = true; // Paper
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+ if (isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread("Server stopped"); // Paper
// Paper end
this.running = false;
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if (waitForShutdown) {
diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 203786383387765d1f5a2d2ccce79d792fd5b187..8044885a91b316b2e5e92dd6260b8e515dcea5a9 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
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@@ -183,6 +183,11 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
} catch (Exception exception) {
ServerLoginPacketListenerImpl.LOGGER.error("Couldn't place player in world", exception);
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MutableComponent ichatmutablecomponent = Component.translatable("multiplayer.disconnect.invalid_player_data");
+ // Paper start
+ if (MinecraftServer.getServer().isDebugging()) {
+ exception.printStackTrace();
+ }
+ // Paper end
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this.connection.send(new ClientboundDisconnectPacket(ichatmutablecomponent));
this.connection.disconnect(ichatmutablecomponent);
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 760f42c620033aef43e4a7765dd7ba0b743a6ad4..ae5d775c00b377aa5be383874b4af61a5951186b 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -1015,6 +1015,7 @@ public final class CraftServer implements Server {
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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+ if (console.isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread(worker.getThread(), "still running"); // Paper
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}
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this.loadPlugins();
this.enablePlugins(PluginLoadOrder.STARTUP);