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To: freebsd-java@freebsd.org
Date: Thu, 21 Feb 2008 18:07:18 -0800
From: Mika Nystrom <mika@async.caltech.edu>
Cc: mika@camembert.async.caltech.edu
Subject: Memory leak in 1.5.0 JVM
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Hello there freebsd-java,

I am running a binary downloaded 1.5.0 JVM on a FreeBSD 5.5 system:

(167)rover:~/levinc/memleak>java -version
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build diablo-1.5.0-b01)
Java HotSpot(TM) Client VM (build diablo-1.5.0_07-b01, mixed mode)
(168)rover:~/levinc/memleak>uname -a
FreeBSD rover 5.5-RELEASE FreeBSD 5.5-RELEASE #4: Sat Nov 17 12:13:24 PST 2007     mika@rover:/usr/src/sys/i386/compile/ROVER  i386

I have found the following program to leak memory on FreeBSD, but not on Windows with same Java 1.6.0, nor on Debian with gij 1.4.2:

class Leakq {

  private static class MyThread extends Thread {
    public void run() 
    {

    }
  }

  public static void main (String[] args)
  {
    for(;;) {
      (new MyThread()).start();
    }
  }
}

    Best regards,
      Mika Nystrom
      mika@alum.mit.edu