RFR: 8359174: tools/jlink/JLink20000Packages.java timed out [v4]

[Henry Jen]

> Create a jar directly from the memory instead of real file, this should reduce the I/O overhead which likely the reason for the time out.
> The issue is not reproducible locally, and fails intermittently, so we simply trying to reduce time needed.
> The jar file created is verified manually running jtreg with retain=all.

Henry Jen has updated the pull request incrementally with one additional commit since the last revision:

  Adapt review feedbacks

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25981/files
  - new: https://git.openjdk.org/jdk/pull/25981/files/21df3e62..ce0503dc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25981&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25981&range=02-03

  Stats: 93 lines in 1 file changed: 43 ins; 21 del; 29 mod
  Patch: https://git.openjdk.org/jdk/pull/25981.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25981/head:pull/25981

PR: https://git.openjdk.org/jdk/pull/25981