[IO-161] FileCleaningTrackerTestCase hangs

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4
• Fix Version/s: 2.0
• Component/s: Utilities

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)

• Assignee: Niall Pemberton
• Reporter: Sebastiano Vigna
• Created: 01/Apr/08 21:42
• Updated: 21/Jul/10 17:00
• Resolved: 04/Dec/08 00:07

Description

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 .