Increase freeze conditions, fix watchdog timeout

SpigotCore_Main/src/de/steamwar/core/CheckpointUtils.java

@@ -58,7 +58,7 @@ public class CheckpointUtils {
         Bukkit.getOnlinePlayers().forEach(player -> player.kickPlayer(null));
 
         List<?> networkManagers = TinyProtocol.networkManagers.get(TinyProtocol.getServerConnection(Core.getInstance()));
-        if(!networkManagers.isEmpty()) {
+        if(!Bukkit.getOnlinePlayers().isEmpty() || !networkManagers.isEmpty()) {
             Core.getInstance().getLogger().log(Level.INFO, "Waiting for players to disconnect for checkpointing");
             Bukkit.getScheduler().runTaskLater(Core.getInstance(), CheckpointUtils::freeze, 1);
             return;

SpigotCore_Main/src/de/steamwar/core/CrashDetector.java

@@ -29,7 +29,7 @@ import java.util.stream.Collectors;
 
 public class CrashDetector {
 
-    private static final long TIMEOUT = 20000;
+    private static final long TIMEOUT = 20_000_000_000L;
     private final AtomicLong lastTick = new AtomicLong(Long.MAX_VALUE);
     private final AtomicLong lastMessage = new AtomicLong(Long.MAX_VALUE);
     private final Thread mainThread = Thread.currentThread();
@@ -39,8 +39,8 @@ public class CrashDetector {
 
     public CrashDetector () {
         Bukkit.getScheduler().runTaskTimer(Core.getInstance(), () -> {
-            lastTick.set(System.currentTimeMillis());
-            lastMessage.set(System.currentTimeMillis());
+            lastTick.set(System.nanoTime());
+            lastMessage.set(System.nanoTime());
         }, 0, 1);
         watchdog = new Thread(this::run, "SteamWar Watchdog");
         watchdog.setDaemon(true);
@@ -59,7 +59,7 @@ public class CrashDetector {
     private void run() {
         SWException.init();
         while (run) {
-            long curTime = System.currentTimeMillis();
+            long curTime = System.nanoTime();
             if(curTime - 4*TIMEOUT >= lastTick.get()) {
                 SWException.log("Server did not recover in " + (curTime - lastTick.get()) + "ms, unclean server stop", "");
                 hardStop();