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From "Henri Yandell (JIRA)" <j...@apache.org>
Subject [jira] Updated: (IO-161) FileCleaningTrackerTestCase hangs
Date Fri, 22 Aug 2008 07:28:44 GMT

     [ https://issues.apache.org/jira/browse/IO-161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Henri Yandell updated IO-161:
-----------------------------

    Fix Version/s: 1.5

> FileCleaningTrackerTestCase hangs
> ---------------------------------
>
>                 Key: IO-161
>                 URL: https://issues.apache.org/jira/browse/IO-161
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Utilities
>    Affects Versions: 1.4
>         Environment: Linux sliver.usr.dsi.unimi.it 2.6.22.14-72.fc6 #1 SMP Wed Nov 21
15:12:59 EST 2007 i686 i686 i386 GNU/Linux
> java version "1.5.0_10"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_10-b03)
> Java HotSpot(TM) Client VM (build 1.5.0_10-b03, mixed mode, sharing)
>            Reporter: Sebastiano Vigna
>             Fix For: 1.5
>
>
> The following code in FileCleaningTrackerTestCase never exits, hanging the whole compilation/testing
process:
>     private void waitUntilTrackCount() {
>         while (theInstance.getTrackCount() != 0) {
>             int total = 0;
>             while (theInstance.getTrackCount() != 0) {
>                 byte[] b = new byte[1024 * 1024];
>                 b[0] = (byte) System.currentTimeMillis();
>                 total = total + b[0];
>                 System.gc();
>             }
>         }
>     }
> It is clear that in theory this code might loop forever, as the allocation of the byte
arrays might never unleash a garbage collection complete enough to deallocate all marker objects,
so to bring the track count to zero. Believe me, it's not only theory :).

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