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https://issues.apache.org/jira/browse/MESOS-8155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Peach updated MESOS-8155:
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Summary: subprocess clone argument should return a Try<pid_t> (was:
subprocess clone argument should return a Try<pid_r>)
> subprocess clone argument should return a Try<pid_t>
> ----------------------------------------------------
>
> Key: MESOS-8155
> URL: https://issues.apache.org/jira/browse/MESOS-8155
> Project: Mesos
> Issue Type: Bug
> Components: libprocess
> Reporter: James Peach
>
> In libprocess, the {{subprocess}} API accepts a {{clone}} argument. This is
> supposed to return a {{pid_t}} and set {{errno}} on error. However. Mesos
> sometimes passes {{ns::clone}} as the {{clone}} argument, and this API does
> not set {{errno}} which results in {{subprocess}} propagating a misleading
> error message up the stack.
> Since it is not at all obvious how to map all the {{ns::clone}} error
> conditions to an expressive {{errno}}, we should just change the clone
> argument to return a {{Try<pid_t>}}.
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