VBoxManage stucks on long operations

[indifferent]

Host OS: openSUSE 13.1 or Fedora 20 or RHEL7 Guest OS: any linux I've tried so far.

Steps to reproduce:

1. Import provided OVA file at least 3 times, avoid spaces in VM name. Provided OVA is simple Fedora-20 install, cleaned from garbage, installed openjdk build dependencies and VBox guest additions, nothing special.

2. Change shared folder path to existing writable folder, but leave "shared" as name of share.

3. Install mercurial, run following command:

hg clone 'http://hg.openjdk.java.net/jdk8u/jdk8u/' && cd 'jdk8u' && bash get_source.sh

4. Download jdk-7u67-linux-i586.tar.gz from ​http://java.sun.com

5. Start all imported VMs, does not matter headless or not.

6. Open number of terminals and run following command in each one of them, change path to jdk8u source, path to jdk-7u67 and name of VM:

   while true; do bash vm-build.sh \
   --with-major=8 \
   --with-src=/home/user/src/jdk8u \
   --with-tag=jdk8u20-b26 \
   --with-boot-jdk=/home/user/jdk-7u67-linux-i586.tar.gz \
   --with-vm="Fedora-20-i586-test1" ; done
   

7. Watch the output from time to time, it usually stucks during make pretty soon on at least 1 of the running VMs, usually during first or second iteration.

OVA file and 2 scripts: ​https://drive.google.com/folderview?id=0B5Kp-cB1sXJrRDd6RlRwOGxLTTg&usp=sharing

[indifferent]

Currently there is only reproducer attached, will adding lot files help with this issue?