Benjamin Mahler created MESOS-1503:
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Summary: Improve slave health checking to prevent rapid widespread
slave removals.
Key: MESOS-1503
URL: https://issues.apache.org/jira/browse/MESOS-1503
Project: Mesos
Issue Type: Improvement
Components: master
Reporter: Benjamin Mahler
Per some discussions with [~tweingartner] and [~vinodkone].
Currently the master uses a SlaveObserver for each registered slave. Each
SlaveObserver operates independently and makes decisions about whether the
slave is healthy.
The independence of these observers means that in some very rare events (e.g.
masters are partitioned from 75% of slaves), the master can very rapidly remove
a large portion of the slaves in the cluster. Ideally such an event could be
deemed dangerous and throttled accordingly through a more intelligent notion of
overall cluster health.
It may be nice to have a single observer that is responsible for health
checking all the slaves. This will allow us to make safer decisions as to when
to determine that slaves are unhealthy.
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