mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-22 18:45:54 +01:00
Improve Watchdog Early Warning Feature - Closes #1319
1) Don't kick in until server has started (the full crash will still kick in before full start) 2) Delay reporting until 10 seconds, then print every 5 3) Make the intervals configurable 4) Make it able to be disabled by setting every interval to <= 0
This commit is contained in:
Aikar
parent
3a70bed5f4
commit
716ca620b1
@ -1,87 +0,0 @@
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From 1981048ec72af6199d70617eebd09d24f9e06e94 Mon Sep 17 00:00:00 2001
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From: miclebrick <miclebrick@outlook.com>
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Date: Wed, 8 Aug 2018 15:30:52 -0400
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Subject: [PATCH] Add 5 second short dumps to watchdog
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diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java
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index 57a4748a30..815c3e6649 100644
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--- a/src/main/java/org/spigotmc/WatchdogThread.java
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+++ b/src/main/java/org/spigotmc/WatchdogThread.java
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@@ -13,8 +13,10 @@ public class WatchdogThread extends Thread
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private static WatchdogThread instance;
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private final long timeoutTime;
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+ private final long shortTimeout; // Paper - Timeout time for just printing a dump but not restarting
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private final boolean restart;
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private volatile long lastTick;
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+ private long lastShortDump; // Paper - Keep track of short dump times to avoid spamming console with short dumps
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private volatile boolean stopping;
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private WatchdogThread(long timeoutTime, boolean restart)
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@@ -22,6 +24,7 @@ public class WatchdogThread extends Thread
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super( "Paper Watchdog Thread" );
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this.timeoutTime = timeoutTime;
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this.restart = restart;
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+ shortTimeout = Math.min(5000, timeoutTime); // Paper - Make short timeout the lower of 5 seconds, and timeout time
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}
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public static void doStart(int timeoutTime, boolean restart)
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@@ -52,9 +55,19 @@ public class WatchdogThread extends Thread
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while ( !stopping )
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{
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//
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- if ( lastTick != 0 && System.currentTimeMillis() > lastTick + timeoutTime && !Boolean.getBoolean("disable.watchdog")) // Paper - Add property to disable
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+ long currentTime = System.currentTimeMillis(); // Paper - do we REALLY need to call this method multiple times?
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+ if ( lastTick != 0 && currentTime > lastTick + shortTimeout && !Boolean.getBoolean("disable.watchdog") ) // Paper - Add property to disable and short timeout
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{
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+ // Paper start
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+ boolean isLongTimeout = currentTime > lastTick + timeoutTime;
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+ // Don't spam short dumps
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+ if ( !isLongTimeout && currentTime < lastShortDump + shortTimeout ) continue;
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+ lastShortDump = currentTime;
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+ // Paper end
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Logger log = Bukkit.getServer().getLogger();
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+ // Paper start - Different message when it's a short timeout
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+ if ( isLongTimeout )
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+ {
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log.log( Level.SEVERE, "The server has stopped responding!" );
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log.log( Level.SEVERE, "Please report this to https://github.com/PaperMC/Paper/issues" );
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log.log( Level.SEVERE, "Be sure to include ALL relevant console errors and Minecraft crash reports" );
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@@ -79,11 +92,19 @@ public class WatchdogThread extends Thread
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}
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}
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// Paper end
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+ } else
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+ {
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+ log.log( Level.SEVERE, "The server has not responded for " + shortTimeout / 1000 + " seconds! Creating thread dump");
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+ }
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+ // Paper end - Different message for short timeout
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log.log( Level.SEVERE, "------------------------------" );
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log.log( Level.SEVERE, "Server thread dump (Look for plugins here before reporting to Paper!):" );
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dumpThread( ManagementFactory.getThreadMXBean().getThreadInfo( MinecraftServer.getServer().primaryThread.getId(), Integer.MAX_VALUE ), log );
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log.log( Level.SEVERE, "------------------------------" );
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//
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+ // Paper start - Only print full dump on long timeouts
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+ if ( isLongTimeout )
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+ {
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log.log( Level.SEVERE, "Entire Thread Dump:" );
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ThreadInfo[] threads = ManagementFactory.getThreadMXBean().dumpAllThreads( true, true );
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for ( ThreadInfo thread : threads )
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@@ -97,11 +118,12 @@ public class WatchdogThread extends Thread
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RestartCommand.restart();
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}
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break;
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+ } // Paper end
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}
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try
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{
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- sleep( 10000 );
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+ sleep( 1000 ); // Paper - Reduce check time to every second instead of every ten seconds, more consistent and allows for short timeout
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} catch ( InterruptedException ex )
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{
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interrupt();
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--
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2.18.0
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@ -0,0 +1,151 @@
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From b232efe9bd3523537d680cca1176dc07cc4adc8c Mon Sep 17 00:00:00 2001
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From: miclebrick <miclebrick@outlook.com>
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Date: Wed, 8 Aug 2018 15:30:52 -0400
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Subject: [PATCH] Add Early Warning Feature to WatchDog
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Detect when the server has been hung for a long duration, and start printing
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thread dumps at an interval until the point of crash.
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This will help diagnose what was going on in that time before the crash.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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index 046bf33f66..8f12ad850b 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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@@ -24,6 +24,8 @@ import org.bukkit.configuration.InvalidConfigurationException;
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import org.bukkit.configuration.file.YamlConfiguration;
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import co.aikar.timings.Timings;
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import co.aikar.timings.TimingsManager;
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+import org.spigotmc.SpigotConfig;
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+import org.spigotmc.WatchdogThread;
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public class PaperConfig {
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@@ -341,4 +343,12 @@ public class PaperConfig {
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}
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tabSpamLimit = getInt("settings.spam-limiter.tab-spam-limit", tabSpamLimit);
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}
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+
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+ public static int watchdogPrintEarlyWarningEvery = 5000;
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+ public static int watchdogPrintEarlyWarningDelay = 10000;
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+ private static void watchdogEarlyWarning() {
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+ watchdogPrintEarlyWarningEvery = getInt("settings.watchdog.early-warning-every", 5000);
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+ watchdogPrintEarlyWarningDelay = getInt("settings.watchdog.early-warning-delay", 10000);
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+ WatchdogThread.doStart(SpigotConfig.timeoutTime, SpigotConfig.restartOnCrash );
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+ }
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}
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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 74c97b5db6..da2e84c6b8 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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@@ -768,6 +768,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
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this.a(this.n);
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// Spigot start
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+ org.spigotmc.WatchdogThread.hasStarted = true;
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Arrays.fill( recentTps, 20 );
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long start = System.nanoTime(), lastTick = start - TICK_TIME, catchupTime = 0, curTime, wait, tickSection = start; // Paper - Further improve server tick loop
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while (this.isRunning) {
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diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
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index 4ac0ab9974..0c45d75adf 100644
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--- a/src/main/java/org/spigotmc/SpigotConfig.java
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+++ b/src/main/java/org/spigotmc/SpigotConfig.java
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@@ -226,7 +226,7 @@ public class SpigotConfig
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restartScript = getString( "settings.restart-script", restartScript );
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restartMessage = transform( getString( "messages.restart", "Server is restarting" ) );
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commands.put( "restart", new RestartCommand( "restart" ) );
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- WatchdogThread.doStart( timeoutTime, restartOnCrash );
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+ //WatchdogThread.doStart( timeoutTime, restartOnCrash ); // Paper - moved to PaperConfig
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}
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public static boolean bungee;
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diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java
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index 57a4748a30..2aff1039ad 100644
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--- a/src/main/java/org/spigotmc/WatchdogThread.java
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+++ b/src/main/java/org/spigotmc/WatchdogThread.java
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@@ -5,6 +5,7 @@ import java.lang.management.MonitorInfo;
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import java.lang.management.ThreadInfo;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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+import com.destroystokyo.paper.PaperConfig;
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import net.minecraft.server.MinecraftServer;
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import org.bukkit.Bukkit;
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@@ -13,6 +14,10 @@ public class WatchdogThread extends Thread
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private static WatchdogThread instance;
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private final long timeoutTime;
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+ private final long earlyWarningEvery; // Paper - Timeout time for just printing a dump but not restarting
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+ private final long earlyWarningDelay; // Paper
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+ public static volatile boolean hasStarted; // Paper
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+ private long lastEarlyWarning; // Paper - Keep track of short dump times to avoid spamming console with short dumps
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private final boolean restart;
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private volatile long lastTick;
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private volatile boolean stopping;
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@@ -22,6 +27,8 @@ public class WatchdogThread extends Thread
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super( "Paper Watchdog Thread" );
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this.timeoutTime = timeoutTime;
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this.restart = restart;
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+ earlyWarningEvery = Math.min(PaperConfig.watchdogPrintEarlyWarningEvery, timeoutTime); // Paper
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+ earlyWarningDelay = Math.min(PaperConfig.watchdogPrintEarlyWarningDelay, timeoutTime); // Paper
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}
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public static void doStart(int timeoutTime, boolean restart)
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@@ -52,9 +59,19 @@ public class WatchdogThread extends Thread
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while ( !stopping )
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{
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//
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- if ( lastTick != 0 && System.currentTimeMillis() > lastTick + timeoutTime && !Boolean.getBoolean("disable.watchdog")) // Paper - Add property to disable
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+ long currentTime = System.currentTimeMillis(); // Paper - do we REALLY need to call this method multiple times?
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+ if ( lastTick != 0 && currentTime > lastTick + earlyWarningEvery && !Boolean.getBoolean("disable.watchdog") ) // Paper - Add property to disable and short timeout
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{
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+ // Paper start
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+ boolean isLongTimeout = currentTime > lastTick + timeoutTime;
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+ // Don't spam short dumps
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+ if ( !isLongTimeout && (earlyWarningEvery <= 0 || !hasStarted || currentTime < lastEarlyWarning + earlyWarningEvery || currentTime < lastTick + earlyWarningDelay)) continue;
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+ lastEarlyWarning = currentTime;
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+ // Paper end
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Logger log = Bukkit.getServer().getLogger();
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+ // Paper start - Different message when it's a short timeout
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+ if ( isLongTimeout )
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+ {
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log.log( Level.SEVERE, "The server has stopped responding!" );
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log.log( Level.SEVERE, "Please report this to https://github.com/PaperMC/Paper/issues" );
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log.log( Level.SEVERE, "Be sure to include ALL relevant console errors and Minecraft crash reports" );
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@@ -79,11 +96,19 @@ public class WatchdogThread extends Thread
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}
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}
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// Paper end
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+ } else
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+ {
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+ log.log( Level.SEVERE, "The server has not responded for " + earlyWarningEvery / 1000 + " seconds! Creating thread dump");
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+ }
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+ // Paper end - Different message for short timeout
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log.log( Level.SEVERE, "------------------------------" );
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log.log( Level.SEVERE, "Server thread dump (Look for plugins here before reporting to Paper!):" );
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dumpThread( ManagementFactory.getThreadMXBean().getThreadInfo( MinecraftServer.getServer().primaryThread.getId(), Integer.MAX_VALUE ), log );
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log.log( Level.SEVERE, "------------------------------" );
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//
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+ // Paper start - Only print full dump on long timeouts
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+ if ( isLongTimeout )
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+ {
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log.log( Level.SEVERE, "Entire Thread Dump:" );
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ThreadInfo[] threads = ManagementFactory.getThreadMXBean().dumpAllThreads( true, true );
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for ( ThreadInfo thread : threads )
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@@ -97,11 +122,12 @@ public class WatchdogThread extends Thread
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RestartCommand.restart();
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}
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break;
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+ } // Paper end
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}
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try
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{
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- sleep( 10000 );
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+ sleep( 1000 ); // Paper - Reduce check time to every second instead of every ten seconds, more consistent and allows for short timeout
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} catch ( InterruptedException ex )
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{
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interrupt();
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--
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2.18.0
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