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From Anindya Sinha <>
Subject Re: Review Request 48313: Consistency in persistent volumes between master and agent on failure.
Date Tue, 12 Jul 2016 20:25:43 GMT

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(Updated July 12, 2016, 8:25 p.m.)

Review request for mesos, Neil Conway and Jiang Yan Xu.


Cosmetic changes based on review comments.

Bugs: MESOS-5448

Repository: mesos

Description (updated)

When the agent receives CheckpointedResourcesMessage, we store the
target checkpoint on disk. On successful create and destroy of
persistent volumes as a part of handling this messages, we commit
the checkpoint on the disk, and clear the target checkpoint.

However, incase of any failure we do not commit the checkpoint to
disk, and exit the agent. When the agent restarts and there is a
target checkpoint present on disk which differs from the committed
checkpoint, we retry to sync the target and committed checkpoint.
On success, we reregister the agent with the master, but in case it
fails, we do not commit the checkpoint and the agent exists.

Diffs (updated)

  src/slave/paths.hpp 339e539863c678b6ed4d4670d75c7ff4c54daa79 
  src/slave/paths.cpp 03157f93b1e703006f95ef6d0a30afae375dcdb5 
  src/slave/slave.hpp 42afa9e2ebe5cf8e35802c8d169f52879d6073ac 
  src/slave/slave.cpp 02982d542c9e6b5b5f7fc8b3c73db6f5bac01358 
  src/slave/state.hpp 0de2a4ee4fabaad612c4526166157b001c380bdb 
  src/slave/state.cpp 9cec0868b1187ed3ccac7f065e8a21c2f52178d9 



All tests passed.


Anindya Sinha

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