FELIX-6759 Follow-up: Replace Thread.stop() with interrupt() in configadmin UpdateThread

configadmin/src/main/java/org/apache/felix/cm/impl/UpdateThread.java

@@ -146,13 +146,16 @@ synchronized void start()
      * initiated will not be processed any more. This method does nothing if
      * the worker thread is not currently active.
      * <p>
-     * If the worker thread does not terminate within 5 seconds it is killed
-     * by calling the (deprecated) <code>Thread.stop()</code> method. It may
-     * be that the worker thread may be blocked by a deadlock (it should not,
-     * though). In this case hope is that <code>Thread.stop()</code> will be
-     * able to released that deadlock at the expense of one or more tasks to
-     * not be executed any longer.... In any case an ERROR message is logged
-     * with the LogService in this situation.
+     * If the worker thread does not terminate within 5 seconds it is
+     * interrupted. It may be that the worker thread is blocked by a deadlock
+     * (it should not, though); interrupting it releases the thread if it is
+     * waiting on an interruptible operation, at the expense of one or more
+     * tasks not being executed any longer. In any case an ERROR message is
+     * logged with the LogService in this situation.
+     * <p>
+     * This used to call <code>Thread.stop()</code>, which has thrown
+     * <code>UnsupportedOperationException</code> since Java 20 and so could
+     * only turn a slow shutdown into a failed one.
      */
     synchronized void terminate()
     {
@@ -176,9 +179,9 @@ synchronized void terminate()
             if ( workerThread.isAlive() )
             {
                 Log.logger.log( LogService.LOG_ERROR,
-                    "Worker thread {0} did not terminate within 5 seconds; trying to kill", new Object[]
+                    "Worker thread {0} did not terminate within 5 seconds; interrupting it", new Object[]
                         { workerBaseName } );
-                workerThread.stop();
+                workerThread.interrupt();
             }
         }
     }