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 time
 - YARN-4005 Completed container whose app is finished is possibly not removed from NMStateStore
 - YARN-3809 Failed to launch new attempts because ApplicationMasterLauncher's threads all hang
 - YARN-3469 ZKRMStateStore: Avoid setting watches that are not required
 - YARN-3094 Reset timer for liveness monitors after RM recovery
 - YARN-2617 Fixed NM to not send duplicate container status whose app is not running
 
- 
Zookeeper-1853: zkCli.sh can't issue a CREATE command containing spaces in the data
Just a little effort, commit is at https://github.com/apache/zookeeper/commit/61abcbc102d3039a94ce5dc19477818d38fd7ffd.
 
- issue-778 Reconnect to search backend DB when it disconnected, commit is at https://github.com/docker/docker-registry/commit/acd905284bc986d9f64be0d8237713e2b0791805?diff=split