MAPREDUCE-6172. TestDbClasses timeouts are too aggressive. Contributed by Varun Saxena
(cherry picked from commit 2b30fb1053e70c128b98013fb63cf9a095623be6)
YARN-2905. AggregatedLogsBlock page can infinitely loop if the aggregated log file is corrupted. Contributed by Varun Saxena
(cherry picked from commit 0f9528b99addbb0fd9a19d84db22a8c8e934b05f)
MAPREDUCE-6160. Potential NullPointerException in MRClientProtocol interface implementation. Contributed by Rohith
(cherry picked from commit 0c588904f8b68cad219d2bd8e33081d5cae656e5)
YARN-2765. Added leveldb-based implementation for RMStateStore. Contributed by Jason Lowe
(cherry picked from commit a7fba0bc28764e0fb36c335ea60cc58079fe007f)
YARN-2890. MiniYARNCluster should start the timeline server based on the configuration. Contributed by Mit Desai.

(cherry picked from commit 51af8d367de94689770f57c64bea3b244d7755f6)