Bug ID: JDK-8249846 Change of behavior after JDK-8237117: Better ForkJoinPool behavior

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JDK 8	Other
8u261Fixed	openjdk8u282Fixed

Behavior of ForkJoinWorkerThread created by defaultForkJoinWorkerThreadFactory have changed after JDK-8237117.

AccessControlContext of the thread is set to the innocuousAcc with no permissions. Previous behavior was to inherit ACC from the thread that created ForkJoinPool. 

The change can be observed by user code, as shown by an example in attach

Please look for the start of discussion in JDK-8249677

URL: https://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/0c39a12473c9 User: andrew Date: 2020-12-02 04:52:45 +0000
02-12-2020
URL: https://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk/rev/0c39a12473c9 User: mbalao Date: 2020-11-26 13:44:40 +0000
26-11-2020
Fix request (8u) I'd like to have this bug fix approved for 8u, as the release is affected by this regression which changes the previous behavior. There are users impacted. Risk is low because the fix is straight forward. The fix proposal has been review-approved here: https://mail.openjdk.java.net/pipermail/jdk8u-dev/2020-November/013094.html
25-11-2020
8u code review: https://mail.openjdk.java.net/pipermail/jdk8u-dev/2020-August/012459.html
27-08-2020
This issue (Change of behavior after JDK-8237117) is specific to the 8u release family, since the in behavior of JDK versions greater than 8 has not changed in the way described by this issue. I've added a couple of release not-applicable labels, e.g. 9-na.
31-07-2020
As it was mentioned in: https://bugs.openjdk.java.net/browse/JDK-8249677?focusedCommentId=14356806&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-14356806 This change of behavior has been introduced into 8u262 by 8237117, however, it was already there in other versions since JDK9+. As such, 11.0.7 and 14.0.1 (neither of them containing 8237117) will also fail this test. As Robert said, this is most likely the result of 8172726
22-07-2020

Relates :	JDK-8249677 - Regression in 8u after JDK-8237117: Better ForkJoinPool behavior
Relates :	JDK-8250546 - Expect changed behaviour reported in JDK-8249846
Relates :	JDK-8172726 - ForkJoin common pool retains a reference to the thread context class loader
Relates :	JDK-8273124 - Change of behavior after JDK-8237117: Better ForkJoinPool behavior - JDK 11