Diagnostics: Application killed by a user.

[#1]

My Sqoop jobs and Hive queries are randomly getting killed:

All I get in job logs in:

Diagnostics: Application killed by a user.

I know for sure that these jobs are not being killed by anyone.

My RM is running in HA mode. All my services are up and running without any warnings. I don't think it could be a memory issue since I can see my servers have available memory and it happens even when very few jobs are running.Please help.

[#2]

Check which queue your job is running under and make sure the queue has enough resources. here is a jira opened sometime back about the error message:

https://issues.apache.org/jira/browse/YARN-4111