Review Request 39857: Master/Slave: Add a REASON for TASK_LOST with hard slave drain

[Guangya Liu]

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Review request for mesos and Ben Mahler.


Bugs: MESOS-2077
    https://issues.apache.org/jira/browse/MESOS-2077


Repository: mesos


Description
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Update main logic in mesos for both master and slave.


Diffs
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  src/master/master.hpp b76d30197b3decda0a742e03ce01a17a64b633ac 
  src/master/master.cpp 9f4586e668a2141f4937497d42853fbdea7751a5 
  src/slave/slave.cpp 5f9b52b41eaab0c24965f28e192074340e00bde5 

Diff: https://reviews.apache.org/r/39857/diff/


Testing
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make
make check


Thanks,

Guangya Liu