Suggested fix [JDK-8307091](https://bugs.openjdk.org/browse/JDK-8307091) also created concurrent exception intermittently (monthly once/quarterly once) on CI system. The issue was not able to be reproduced yet, hence proposing an alternative fix which uses iterators to compare the List. CI testing shows green.
------------- Commit messages: - Fix Changes: https://git.openjdk.org/jdk/pull/17462/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17462&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8323670 Stats: 17 lines in 1 file changed: 13 ins; 0 del; 4 mod Patch: https://git.openjdk.org/jdk/pull/17462.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/17462/head:pull/17462 PR: https://git.openjdk.org/jdk/pull/17462
