@Victor You can get detailed explaination about Yarn "Cluster Memory" in the following thread. https://community.hortonworks.com/questions/144325/why-my-cluster-memory-is-less-even-though-physical.html Regaarding 0 (Zero Memory utiliaztion). Until you run a job you wont see the memory being utilized. So please try running some job like following and then refresh the ambari Yarn dashboard. # su - spark # export SPARK_MAJOR_VERSION=2 # cd /usr/hdp/current/spark2-client # ./bin/spark-submit --class org.apache.spark.examples.SparkPi --master yarn-client --num-executors 3 --driver-memory 512m --executor-memory 512m --executor-cores 1 examples/jars/spark-examples*.jar 10 . ... View more

Okay ! after a bit of search on stackoverflow I came across the command `sudo chown -R $USER:$USER /home/rahul/nifi-1.6.0` that will give the permission to the folder to alter the changes with permission to read and write, and Bingo !!! it worked . And after firing the command mentioned in above, there is no error as following : Exception in thread "main" java.io.IOException: /home/nifi-1.6.0/run directory does not have read/write privilege Thanks @Matt Clarke @Jay Kumar SenSharma ... View more

Well I found a solution, took me a lot of time. Figured that some application was using port 8080 by: C:\WINDOWS\system32>netstat -anob | findstr "8080" TCP 0.0.0.0:8080 0.0.0.0:0 LISTENING 4700 TCP 127.0.0.1:8080 127.0.0.1:49327 TIME_WAIT 0 TCP 127.0.0.1:8080 127.0.0.1:49328 TIME_WAIT 0 TCP 127.0.0.1:8080 127.0.0.1:49329 TIME_WAIT 0 TCP 127.0.0.1:8080 127.0.0.1:49399 TIME_WAIT 0 TCP [::]:8080 [::]:0 LISTENING 4700 TCP [::1]:8080 [::1]:65314 TIME_WAIT 0 TCP [::1]:8080 [::1]:65315 TIME_WAIT 0 TCP [::1]:8080 [::1]:65316 TIME_WAIT 0 TCP [::1]:8080 [::1]:65343 TIME_WAIT 0 TCP [::1]:8080 [::1]:65344 TIME_WAIT 0 TCP [::1]:8080 [::1]:65391 TIME_WAIT 0 TCP [::1]:8080 [::1]:65392 TIME_WAIT 0 So I kill that application with PID 4700: C:\WINDOWS\system32>taskkill /PID 4700 /F SUCCESS: The process with PID 4700 has been terminated. Start VM from virtualbox again and I am happy and Ambari is up and running! Cheers. ... View more