[jira] [Created] (LUCENE-9738) Odd behavior with tests forked into the default ForkJoinPool

["Dawid Weiss (Jira)" <ji...@apache.org>]

Dawid Weiss created LUCENE-9738:
-----------------------------------

             Summary: Odd behavior with tests forked into the default ForkJoinPool
                 Key: LUCENE-9738
                 URL: https://issues.apache.org/jira/browse/LUCENE-9738
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Dawid Weiss
            Assignee: Dawid Weiss


Just for the record, this will perhaps save somebody some search time. This test currently fails with out test policy:
{code}
public void testInsanity() throws ExecutionException, InterruptedException {
    // This is fine. This property should be read-accessible to anything in Java.
    System.getProperty("line.separator");

   // but this fails:
   ForkJoinTask<String> task =
        ForkJoinPool.commonPool()
            .submit(() -> System.getProperty("line.separator"));

    // Wait a bit to avoid job stealing.
    Thread.sleep(1000);
    task.get();
{code}

The above fails with a cryptic exception:
{code}
Caused by: java.security.AccessControlException: access denied ("java.util.PropertyPermission" "line.separator" "read")
	at java.base/java.security.AccessControlContext.checkPermission(AccessControlContext.java:472)
	at java.base/java.security.AccessController.checkPermission(AccessController.java:1036)
	at java.base/java.lang.SecurityManager.checkPermission(SecurityManager.java:408)
	at java.base/java.lang.SecurityManager.checkPropertyAccess(SecurityManager.java:1152)
	at java.base/java.lang.System.getProperty(System.java:847)
	at org.apache.lucene.TestPermissionsInsanity.lambda$testInsanity$0(TestPermissionsInsanity.java:38)
	at java.base/java.util.concurrent.ForkJoinTask$AdaptedCallable.exec(ForkJoinTask.java:1453)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
{code}

What's odd here is that we only have java.base classes and our own test class on the stack. Seems like by default forkjoin executors have some kind of protection domain that disallows everything... Escaping through AccessController works but it's still surprising that it's not a built-in thing.

Or maybe I misunderstand something, don't know...

CC [~rmuir] - you may find this interesting.



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