Hotfix: Fix Windows backend restart loop and Java 25 mapping bug (v1.1.9)

Author: CalaKuad1

backend/api_server.py

@@ -1671,9 +1671,9 @@ def perform_full_shutdown():
     threading.Thread(target=perform_full_shutdown, daemon=True).start()
     return {"message": "Shutdown sequence started"}
 
-def start_parent_watchdog():
+def start_parent_watchdog(forced_parent_pid=None):
     """Vigila si el proceso padre (Electron) sigue vivo. Si muere, cerramos todo."""
-    parent_pid = os.getppid()
+    parent_pid = forced_parent_pid or os.getppid()
     if parent_pid <= 1: # No parent or init
         return
 
@@ -1943,6 +1943,11 @@ def get_running_servers():
 
 if __name__ == "__main__":
     import uvicorn
+    import argparse
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--parent-pid", type=int)
+    args, _ = parser.parse_known_args()
+    
     # Iniciar el watchdog antes de arrancar el servidor
-    start_parent_watchdog()
+    start_parent_watchdog(args.parent_pid)
     uvicorn.run(app, host="127.0.0.1", port=8000)

backend/utils/java_manager.py

@@ -110,28 +110,28 @@ def get_required_java_version(self, minecraft_version: str) -> int:
 
                 if major_version == 1:
                     if minor_version >= 22:
-                        return 25 # 1.22+ requiere Java 25
+                        return 21 # Default to 21 for unknown future versions (e.g. 1.22+)
                     elif minor_version == 21 and patch_version >= 4:
-                        return 25 # 1.21.4+ requiere Java 25
+                        return 21 # 1.21.4+ works well with 21
                     elif minor_version >= 21:
-                        return 21 # 1.21 - 1.21.3 requiere Java 21
+                        return 21 
                     elif minor_version >= 17:
-                        return 17 # 1.17 - 1.20.6 requiere Java 17
+                        return 17 
             except Exception as e:
-                logger.warning(f"Error parsing version {minecraft_version}: {e}")
+                logger.warning(f"Error parsing version {version}: {e}")
 
             # Si no ha coincidido por lógica numérica, buscar por 'mayor.menor'
             major_minor = f"{parts[0]}.{parts[1]}"
             if major_minor in self.mc_java_requirements:
                 return self.mc_java_requirements[major_minor]
 
-            # Para versiones no mapeadas y muy nuevas, asumir Java 25
-            logger.warning(f"Unknown Minecraft version {minecraft_version}, defaulting to Java 25")
-            return 25
+            # Para versiones no mapeadas y muy nuevas, asumir Java 21
+            logger.warning(f"Unknown Minecraft version {version}, defaulting to Java 21")
+            return 21
 
-        # Fallback para versiones desconocidas
-        logger.warning(f"Unknown Minecraft version {minecraft_version}, defaulting to Java 25")
-        return 25
+        # Fallback para versiones totalmente desconocidas
+        logger.warning(f"Unknown Minecraft version {version}, defaulting to Java 21")
+        return 21
 
     def detect_system_java(self, java_path: str = "java") -> Optional[Tuple[int, str]]:
         """

changelog.txt

@@ -12,6 +12,11 @@
 - **RAM warning system** — Visual warnings when assigning >50% or >75% of system RAM
 - **System info endpoint** — New `/system/info` API returns total RAM for frontend validation
 
+### ⚡ HOTFIX 1.1.9.1 (Included in v1.1.9):
+- **Fixed backend restart loop on Windows** — Watchdog now correctly monitors the Electron process using a passed PID, preventing premature restarts during installations.
+- **Improved Java version mapping** — Version detection now defaults to Java 21/17 for unknown future versions instead of Java 25.
+- **Robust Forge version handling** — Versions like "26.1.1" no longer trigger incorrect Java 25 snapshot logic.
+
 ### 🔧 IMPROVEMENTS:
 - **Smart close behavior** — App checks for running servers before deciding to hide or quit
 - **Tray icon fixes for Linux** — Uses PNG instead of ICO, graceful fallback if tray not supported (Wayland)

electron-app/electron/main.cjs

@@ -130,14 +130,14 @@ function startPythonBackend() {
 
   if (useBinary) {
     console.log(`Starting Bundled Backend: ${binaryPath}`);
-    pythonProcess = spawn(binaryPath, [], {
+    pythonProcess = spawn(binaryPath, ['--parent-pid', process.pid.toString()], {
       cwd: path.dirname(binaryPath),
       stdio: ['ignore', 'pipe', 'pipe'],
       detached: false
     });
   } else {
     console.log(`Starting Python Script: ${scriptPath}`);
-    pythonProcess = spawn(pythonCmd, [scriptPath], {
+    pythonProcess = spawn(pythonCmd, [scriptPath, '--parent-pid', process.pid.toString()], {
       cwd: path.dirname(scriptPath),
       stdio: ['ignore', 'pipe', 'pipe'],
       detached: false