RFR: 8366462: Test gc/z/TestCommitFailure.java#Normal failed: expected output missing

[Axel Boldt-Christmas]

The newly introduced test is intermittently failing where it tries to verify that we got a commit failure. I suggest we simply remove this verification as an initial fix. 

Trying to reproduce these failure paths reliably with a blackbox test is probably not possible. So we would have to extend the JVM with whitebox hooks for doing exactly what we want. I think we need to be very careful in such a design to not affect the maintainability and readability to the code. 

For now it is enough that this test intermittently exercises the commit failure paths and intermittently would reproduce any regressions. 

The risk is having to be more diligent in the future with checking that this test still works when changing ZPageAllocator policies or implementation details.

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

Commit messages:
 - 8366462: Test gc/z/TestCommitFailure.java#Normal failed: expected output missing

Changes: https://git.openjdk.org/jdk/pull/27023/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27023&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366462
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27023.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27023/head:pull/27023

PR: https://git.openjdk.org/jdk/pull/27023