Summary

Add the usual happens-before sentences to the SubmissionPublisher class spec.

Problem

Adding these clarifies that the reported problem (and possibly others) should be considered a bug.

Solution

Add a paragraph to class-level spec. There are no compatibility or other risks in doing so.

Specification

Add the following:

* A single SubmissionPublisher may be shared among multiple
* sources. Actions in a source thread prior to publishing an item or
* issuing a signal <a href="package-summary.html#MemoryVisibility">
* <i>happen-before</i></a> actions subsequent to the corresponding
* access by each subscriber. But reported estimates of lag and demand
* are designed for use in monitoring, not for synchronization
* control, and may reflect stale or inaccurate views of progress.