Fix plugin loggers on server shutdown

paper-server/src/main/java/io/papermc/paper/log/CustomLogManager.java

@@ -0,0 +1,26 @@
+package io.papermc.paper.log;
+
+import java.util.logging.LogManager;
+
+public class CustomLogManager extends LogManager {
+    private static CustomLogManager instance;
+
+    public CustomLogManager() {
+        instance = this;
+    }
+
+    @Override
+    public void reset() {
+        // Ignore calls to this method
+    }
+
+    private void superReset() {
+        super.reset();
+    }
+
+    public static void forceReset() {
+        if (instance != null) {
+            instance.superReset();
+        }
+    }
+}

paper-server/src/main/java/org/bukkit/craftbukkit/Main.java

@@ -19,6 +19,12 @@ public class Main {
     public static boolean useJline = true;
     public static boolean useConsole = true;
 
+    // Paper start - Reset loggers after shutdown
+    static {
+        System.setProperty("java.util.logging.manager", "io.papermc.paper.log.CustomLogManager");
+    }
+    // Paper end - Reset loggers after shutdown
+
     public static void main(String[] args) {
         // Paper start
         final String warnWhenLegacyFormattingDetected = String.join(".", "net", "kyori", "adventure", "text", "warnWhenLegacyFormattingDetected");