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From "Elena Semukhina (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-2343) [drlvm][kernel test] ThreadTest.testYield() fails intermittently on linux.
Date Tue, 28 Nov 2006 11:28:22 GMT
[drlvm][kernel test] ThreadTest.testYield() fails intermittently on linux.
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                 Key: HARMONY-2343
                 URL: http://issues.apache.org/jira/browse/HARMONY-2343
             Project: Harmony
          Issue Type: Bug
          Components: DRLVM
            Reporter: Elena Semukhina


The test fails approximately once per 10 runs. It fails mainly in the batch mode and usually
passes when running separately.

The attached test is an excerpt from ThreadTest but it is not an issue reproducer. On the
contrary, it demonstrates fine threads alternating on DRLVM while it always fails on RI 1.5.0_08.


Nevertheless, I think ThreadTest is not quite correct. The spec says:

(yield) Causes the currently executing thread object to temporarily pause and allow other
threads to execute.

The test should not expect that the two threads alternate. Any other thread can execute while
some thread yields. And this happens most likely when a lot of threads are alive during the
test run.



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