Contribution to open source by hex108:
- YARN-4497 RM might fail to restart when recovering apps whose attempts are missing
- YARN-3480 Remove attempts that are beyond max-attempt limit from state store
- YARN-4256 YARN fair scheduler vcores with decimal values
- YARN-4201 AMBlacklist does not work for minicluster
- HADOOP-12388 Fix components' version information in the web page About the Cluster
- YARN-3896 RMNode transitioned from RUNNING to REBOOTED because its response id has not been reset synchronously
- YARN-4057 If ContainersMonitor is not enabled, only print related log info one