NO-JIRA Fixing a deadlock during #tearDown and TimedBuffer.stop

artemis-journal/src/main/java/org/apache/activemq/artemis/core/io/buffer/TimedBuffer.java

@@ -170,6 +170,7 @@ public final class TimedBuffer extends CriticalComponentImpl {
 
    public void stop() {
       enterCritical(CRITICAL_PATH_STOP);
+      Thread localTimer = null;
       try {
          // add critical analyzer here.... <<<<
          synchronized (this) {
@@ -190,16 +191,24 @@ public final class TimedBuffer extends CriticalComponentImpl {
                   logRatesTimerTask.cancel();
                }
 
-               while (timerThread.isAlive()) {
+               localTimer = timerThread;
+               timerThread = null;
+
+            } finally {
+               started = false;
+            }
+         }
+         if (localTimer != null) {
+            while (localTimer.isAlive()) {
                try {
-                     timerThread.join();
+                  localTimer.join(1000);
+                  if (localTimer.isAlive()) {
+                     localTimer.interrupt();
+                  }
                } catch (InterruptedException e) {
                   throw new ActiveMQInterruptedException(e);
                }
             }
-            } finally {
-               started = false;
-            }
          }
       } finally {
          leaveCritical(CRITICAL_PATH_STOP);