Access logs from RM UI : Using RM UI > Applications > click on your failed application > application master > then goto the logs at the end of screen . - it's good idea to check your container logs which may shows whats happening .     - if you are using hive-tez kinda of issues appear if missing class , once the container start loading these class for tez , because count(*), insert queries will use yarn to submit new application ; so it's good check classpath for tez , and check if you have correct tez.tar.gz on the HDFS which contains all needed jars . ... View more