[jdk17u-dev] RFR: 8316580: HttpClient with StructuredTaskScope does not close when a task fails [v2]

[Goetz Lindenmaier]

> I backport this for parity with 17.0.17-oracle.
> 
> The change applies clean, but the test does not work out-of-the-box.
> 
> It calls some utility methods ReferenceTracker.java that were added by JDK-8305847.
> That change is not in the current list of backports, so I added the utility methods 
> to this change.
> 
> Further, the test depends on the fact that in 21 a row of classes implement
> AutoClosable, which they don't do in 21.
> I adapted a row of places to work around this. 
> A try-with-resources statement was easy to replace, as the missing 
> close() implementation uses public methods, so that I could copy the
> code to the test.
> In TestTaskScope I replaced close()  by shutdownNow().
> Finally I removed the "useReferenceTracker=false" test variant, as the
> HttpClient implementation is quite far off of the implementation in 21.

Goetz Lindenmaier has updated the pull request incrementally with one additional commit since the last revision:

  more graceful close() implementation

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/3706/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/3706/files/1a29498b..622ef2fd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3706&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3706&range=00-01

  Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3706.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3706/head:pull/3706

PR: https://git.openjdk.org/jdk17u-dev/pull/3706