Review Request 16589: ZooKeeperMasterContenderProcess::contend now checks if the future for the previous contend() is still pending and if so it directly returns that future without recontending.

[Jiang Yan Xu]

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Review request for mesos, Benjamin Hindman, Ben Mahler, and Vinod Kone.


Repository: mesos-git


Description
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See summary.


Diffs
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  src/master/contender.cpp 84b0552a1375726d9a2fd6213b49e13f49027c3d 

Diff: https://reviews.apache.org/r/16589/diff/


Testing
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make check.


Thanks,

Jiang Yan Xu