Executors.newSingleThreadExecutor returns a delegating ExecutorService that has finalizer to shutdown the underlying TPE when the wrapper is finalizable. It goes back to JDK 6 and JDK-6399443. This is the last non-empty finalizer in java.base. Removing it will likely lead to bug reports/complaints as the current behavior goes back to 2006. So the proposal is to just replace it with a Cleaner, trivially done in this case. As part of the changes, I've replaced the existing test with a more modern test that exercises more scenarios.
------------- Commit messages: - Replace older test - Initial commit Changes: https://git.openjdk.org/jdk/pull/12675/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12675&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8302899 Stats: 147 lines in 2 files changed: 52 ins; 19 del; 76 mod Patch: https://git.openjdk.org/jdk/pull/12675.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12675/head:pull/12675 PR: https://git.openjdk.org/jdk/pull/12675
