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https://issues.apache.org/jira/browse/MESOS-660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Mahler updated MESOS-660:
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Fix Version/s: (was: 0.19.0)
> Better slave recovery semantics when flags are changed.
> -------------------------------------------------------
>
> Key: MESOS-660
> URL: https://issues.apache.org/jira/browse/MESOS-660
> Project: Mesos
> Issue Type: Improvement
> Reporter: Benjamin Mahler
> Assignee: Vinod Kone
> Labels: twitter
>
> Ideally we can have one of the following semantics apply for all of the slave
> flags:
> 1. Safety: If the flag is modified and this will have an strange or
> unintended behavior, do not proceed.
> 2. "Do The Right Thing": If flags are modified and the slave can take action
> to ensure the expected behavior occurs. Many of the isolator related flags
> can DTRT.
> We currently have neither of these properties covered for all flags. For
> example:
> -Any of the slave flags that affect SlaveInfo will have "Safe" semantics.
> The slave will not proceed with recovery as the master has cached the
> SlaveInfo.
> -Adding --cgroups_cfs_enabled will DTRT (apply cfs_quota_us to existing
> executors). But removing it will not DTRT (will leave cfs_quota_us untouched
> if it is already applied)!
> It's not clear what level of support we want to provide for flag changes, but
> at the very least we need Safety, otherwise things will behave strangely.
> Assigning this to Vinod as a placeholder for now.
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