YARN-9657. AbstractLivelinessMonitor add serviceName to PingChecker thread. Contributed by Bilwa S T.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/AbstractLivelinessMonitor.java

@@ -67,7 +67,7 @@ public abstract class AbstractLivelinessMonitor<O> extends AbstractService {
     assert !stopped : "starting when already stopped";
     resetTimer();
     checkerThread = new Thread(new PingChecker());
-    checkerThread.setName("Ping Checker");
+    checkerThread.setName("Ping Checker for "+getName());
     checkerThread.start();
     super.serviceStart();
   }