RFR: 8288899: java/util/concurrent/ExecutorService/CloseTest.java failed with "InterruptedException: sleep interrupted" [v50]

[Doug Lea]

> Addresses Jdk 8288899 : java/util/concurrent/ExecutorService/CloseTest.java failed with "InterruptedException: sleep interrupted" and related issues.
> 
> This is a major ForkJoin update (and hard to review -- sorry) that finally addresses incompatibilities between ExecutorService and ForkJoinPool (which claims to implement it), with the goal of avoiding continuing bug reports and incompatibilities. Doing this required reworking internal control to use phaser/seqlock-style versioning schemes (affecting nearly every method) that ensure consistent data structures and actions without requiring global synchronization or locking on every task execution that would massively degrade performance. The previous lack of a solution to this was the main reason for these incompatibilities.

Doug Lea has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 98 additional commits since the last revision:

 - Merge branch 'openjdk:master' into JDK-8288899
 - More cleanup
 - Merge branch 'openjdk:master' into JDK-8288899
 - better window encoding
 - Merge branch 'openjdk:master' into JDK-8288899
 - cleanup
 - Merge branch 'openjdk:master' into JDK-8288899
 - refactor termination
 - Undo stray edit
 - Streamline push; add redundant interrupts
 - ... and 88 more: https://git.openjdk.org/jdk/compare/914d79dc...005ea626

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/14301/files
  - new: https://git.openjdk.org/jdk/pull/14301/files/45585dc3..005ea626

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14301&range=49
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14301&range=48-49

  Stats: 9187 lines in 430 files changed: 4580 ins; 2866 del; 1741 mod
  Patch: https://git.openjdk.org/jdk/pull/14301.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14301/head:pull/14301

PR: https://git.openjdk.org/jdk/pull/14301