[jdk21u-dev] RFR: 8343855: HTTP/2 ConnectionWindowUpdateSender may miss some unprocessed DataFrames from closed streams [v3]

[Paul Hohensee]

> Backport for parity with Oracle 21.0.8. Passes tier2 and modified tests. Low risk: /1 locks existing unlocked code, which reduces risk, /2 adds a safety check/constrant (pushDataFrame in Stream.java).
> 
> Clean except for whitespace change in Stream.java from 8309118, 8309118 isn't in 21u.

Paul Hohensee 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 three additional commits since the last revision:

 - Merge branch 'master' into 8343855
 - Revert part of 8309118
 - Backport bd6152f5967107d7b32db9bcfa224fc07314f098

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

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/1585/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/1585/files/c6efee77..33149d78

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1585&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1585&range=01-02

  Stats: 847 lines in 38 files changed: 668 ins; 41 del; 138 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1585.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1585/head:pull/1585

PR: https://git.openjdk.org/jdk21u-dev/pull/1585