Interrupt wal-delete thread when WALManager is closed

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/wal/WALManager.java

@@ -166,6 +166,7 @@ public void rebootWALDeleteThread() {
     logger.info("Start rebooting wal delete thread.");
     if (walDeleteThread != null) {
       shutdownThread(walDeleteThread, ThreadName.WAL_DELETE);
+      walDeleteThread = null;
     }
     logger.info("Stop wal delete thread successfully, and now restart it.");
     registerScheduleTask(0, config.getDeleteWalFilesPeriodInMs());
@@ -179,7 +180,7 @@ private void deleteOutdatedFiles() {
     // threshold, the system continues to delete expired files until the disk size is smaller than
     // the threshold.
     boolean firstLoop = true;
-    while (firstLoop || shouldThrottle()) {
+    while ((firstLoop || shouldThrottle()) && !Thread.interrupted()) {
       deleteOutdatedFilesInWALNodes();
       if (firstLoop && shouldThrottle()) {
         logger.warn(
@@ -275,7 +276,7 @@ public void stop() {
   }
 
   private void shutdownThread(ExecutorService thread, ThreadName threadName) {
-    thread.shutdown();
+    thread.shutdownNow();
     try {
       if (!thread.awaitTermination(30, TimeUnit.SECONDS)) {
         logger.warn("Waiting thread {} to be terminated is timeout", threadName.getName());