[MESOS-954] The /__processes__ endpoint in libprocess is missing a needed lock acquisition. - ASF JIRA

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Looks like the processing of each event queue in _processes_ is lacking the needed lock acquisition:

Future<Response> ProcessManager::_processes_(const Request&)
{
JSON::Array array;

synchronized (processes) {
foreachvalue (const ProcessBase* process, process_manager->processes) {
...

// XXX: This processes the event queue but does not lock process.
foreach (Event* event, process->events)

{ event->visit(&visitor); }

object.values["events"] = events;
array.values.push_back(object);
}
}

return OK(array);
}