Display blacklisted nodes for AM container in the RM web UI

In pseudo cluster had 2 NM's and had launched app with incorrect configuration ./hadoop org.apache.hadoop.mapreduce.SleepJob -Dmapreduce.job.node-label-expression=labelX -Dyarn.app.mapreduce.am.env=JAVA_HOME=/no/jvm/here -m 5 -mt 1200.
First attempt failed and 2nd attempt was launched, but the application was hung. In the scheduler logs found that localhost was blacklisted but in the UI (app& apps listing page) count was shown as zero and as well no hosts listed in the app page.