HADOOP-9635. Fix potential stack overflow in DomainSocket.c (V. Karthik Kumar via cmccabe)



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HADOOP-9532. Merging change r1478072 from trunk to branch-2

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HADOOP-9625. Merging change r1491907 from trunk

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HDFS-4873. Merging change r1491957 from trunk to branch-2.

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Merge -c 1491989 from trunk to branch-2 to fix RN-767. Initialize application metrics at RM bootup. Contributed by Jian He.

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merge TEZ-731 from trunk. RPCUtil.unwrapAndThrowException should unwrap remote RuntimeExceptions. Contributed by Zhijie Shen.


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Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-HADOOP-9166-branch-2-gd