[SPARK-18119][SPARK-CORE] Namenode safemode check is only performed on one namenode which can stuck the startup of SparkHistory server#8

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ashangit merged 1 commit intocriteo-forks:criteo-1.6from

ashangit:criteo-1.6

Nov 24, 2016

Commits on Oct 26, 2016

[SPARK-18119][SPARK-CORE] Namenode safemode check is only performed on one namenode which can stuck the startup of SparkHistory server
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