Resolves a visibility issue in SubmissionPublisher by making the `waiter` member of BufferedSubscription *volatile*.
------------- Commit messages: - Addresses JDK-8293713 by making the waiter thread member volatile Changes: https://git.openjdk.org/jdk/pull/16313/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16313&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8293713 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/16313.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16313/head:pull/16313 PR: https://git.openjdk.org/jdk/pull/16313
