[openstack-dev] [Nova] RPC Communication Errors Might Lead to a Bad State

Dan Smith dms at danplanet.com
Thu Apr 14 14:01:05 UTC 2016

>> I have wanted to make a change for a while that involves a TTL on
>> messages, along with a deadline record so that we can know when to retry
>> or revert things that were in flight. This requires a lot of machinery
>> to accomplish, and is probably interwoven with the task concept we've
>> had on the back burner for a while. The complexity of moving nova to
>> this sort of scheme means that nobody has picked it up as of yet, but
>> it's certainly in the minds of many of us as something we need to do
>> before too long.
> Are you still thinking of this kind of mechanism deployment?
> We need any kind of RPC handling mechanism at the end of the day.

I'm not sure what you're saying exactly. The above would be something we
integrate with our RPC calls to signal to us when they may have been
dropped or failed. It wouldn't replace the mechanism or need for RPC at
a fundamental level.


More information about the OpenStack-dev mailing list