8286171: HttpClient/2 : Expect:100-Continue blocks indefinitely when response is not 100

[GoeLin]

I would backport this as we currently do a larger effort of fixing http issues, and this is a bugfix that fits well into this task. It will make other backports planned more simple.

Clean backport.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8286171 needs maintainer approval

Issue

• JDK-8286171: HttpClient/2 : Expect:100-Continue blocks indefinitely when response is not 100 (Bug - P3)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/3721/head:pull/3721
$ git checkout pull/3721

Update a local copy of the PR:
$ git checkout pull/3721
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/3721/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3721

View PR using the GUI difftool:
$ git pr show -t 3721

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/3721.diff

[bridgekeeper]

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.