AMBARI-6734 ambari-server.log size is growing rapidly and contains lots of excess WARN records (dsen)

ambari-server/src/main/java/org/apache/ambari/server/controller/ganglia/GangliaPropertyProvider.java

@@ -552,7 +552,7 @@ public abstract class GangliaPropertyProvider extends AbstractPropertyProvider {
         }
       } catch (IOException e) {
         if (LOG.isErrorEnabled()) {
-          LOG.error("Caught exception getting Ganglia metrics : spec=" + spec, e);
+          LOG.error("Caught exception getting Ganglia metrics : spec=" + spec);
         }
       } finally {
         if (reader != null) {

ambari-server/src/main/java/org/apache/ambari/server/controller/jmx/JMXPropertyProvider.java

@@ -551,7 +551,6 @@ public class JMXPropertyProvider extends AbstractPropertyProvider {
   private static String logException(Throwable throwable) {
     String msg = "Caught exception getting JMX metrics : " + throwable.getLocalizedMessage();
 
-    LOG.error(msg);
     LOG.debug(msg, throwable);
 
     return msg;

ambari-server/src/main/java/org/apache/ambari/server/state/cluster/ClusterImpl.java

@@ -1854,7 +1854,7 @@ public class ClusterImpl implements Cluster {
           ServiceComponentHost serviceComponentHost = serviceComponent.getServiceComponentHost(event.getHostName());
           serviceComponentHost.handleEvent(event);
         } catch (AmbariException e) {
-          LOG.error("ServiceComponentHost lookup exception ", e);
+          LOG.error("ServiceComponentHost lookup exception ", e.getMessage());
           failedEvents.add(event);
         } catch (InvalidStateTransitionException e) {
           LOG.error("Invalid transition ", e);

ambari-server/src/main/java/org/apache/ambari/server/state/svccomphost/ServiceComponentHostImpl.java

@@ -741,7 +741,7 @@ public class ServiceComponentHostImpl implements ServiceComponentHost {
           saveIfPersisted();
           // TODO Audit logs
         } catch (InvalidStateTransitionException e) {
-          LOG.error("Can't handle ServiceComponentHostEvent event at"
+          LOG.debug("Can't handle ServiceComponentHostEvent event at"
               + " current state"
               + ", serviceComponentName=" + this.getServiceComponentName()
               + ", hostName=" + this.getHostName()