This is just a work-around for avoiding OutOfMemoryErrors during jboss boot, when running under Sun 64-bit linux jdk. It doesn't guarantee the OOME will not happen, but this is better than nothing, until Sun fixes the broken jdk.

The fix has been tested in HEAD for 3 months without any problems reported so we apply it to the 4.0.x branch, too.

For more info, read the linked forum post.