Hotfix for non-shutdown of http server (#13485)

Author: koppor

jabsrv/src/main/java/org/jabref/http/manager/HttpServerManager.java

@@ -25,6 +25,12 @@ public synchronized void start(ObservableList<BibDatabaseContext> contextsToServ
         if (!isStarted()) {
             httpServerThread = new HttpServerThread(contextsToServe, uri);
             httpServerThread.start();
+            if (httpServerThread.started()) {
+                LOGGER.debug("HTTP server manager started successfully.");
+            } else {
+                LOGGER.error("Failed to start HTTP server manager.");
+                httpServerThread = null;
+            }
         }
     }
 

jabsrv/src/main/java/org/jabref/http/manager/HttpServerThread.java

@@ -7,6 +7,7 @@
 import org.jabref.http.server.Server;
 import org.jabref.model.database.BibDatabaseContext;
 
+import jakarta.ws.rs.ProcessingException;
 import org.glassfish.grizzly.http.server.HttpServer;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -33,13 +34,25 @@ public HttpServerThread(ObservableList<BibDatabaseContext> contextsToServe, URI
 
     @Override
     public void run() {
-        httpServer = this.server.run(contextsToServe, uri);
+        try {
+            httpServer = this.server.run(contextsToServe, uri);
+        } catch (ProcessingException e) {
+            LOGGER.error("Failed to start HTTP server thread: {}", e);
+        }
     }
 
     @Override
     public void interrupt() {
         LOGGER.debug("Interrupting {}", this.getName());
-        this.httpServer.shutdownNow();
+        if (this.httpServer == null) {
+            LOGGER.warn("HttpServer is null, cannot shutdown.");
+        } else {
+            this.httpServer.shutdownNow();
+        }
         super.interrupt();
     }
+
+    public boolean started() {
+        return httpServer != null && httpServer.isStarted();
+    }
 }