[YARN-431] [Umbrella] Complete/Stabilize YARN application log-handling - ASF JIRA

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relates to

MAPREDUCE-3143 Complete aggregation of user-logs spit out by containers onto DFS

YARN-4029 Update LogAggregationStatus to store on finish

1.	Allow per job log aggregation configuration	Open	Unassigned	Actions
2.	NodeManager should serve logs directly if log-aggregation is not enabled	Open	Siddharth Seth	Actions
3.	Log aggregation should not assume an AppMaster will have containerId 1	Open	Unassigned	Actions
4.	Documentation for Log Aggregation and log retrieval.	Open	Vinod Kumar Vavilapalli	Actions
5.	NM should limit number of applications who's logs are being aggregated	Open	Unassigned	Actions
6.	nodemanager log aggregation has scaling issues with namenode	Open	Kuhu Shukla	Actions
7.	Page navigation support for container logs page and the logs web-service on NMs	Open	Omkar Vinit Joshi	Actions
8.	Yarn aggregated logs are difficult for external tools to understand	Open	Unassigned	Actions
9.	IOException in AppLogAggregatorImpl does not give stacktrace and leaves aggregated TFile in a bad state.	Open	Xuan Gong	Actions
10.	Ability to limit or avoid aggregating logs beyond a certain size	Open	Unassigned	Actions
11.	Log aggregation finish time should get logged for trouble shooting.	Open	Junping Du	Actions