GNU Parallel unlink error

Did a local install of GNU Parallel on a virtual Ubuntu server:

$uname -a
Linux #### 2.6.32-43-server #97-Ubuntu SMP Wed Sep 5 16:56:41 UTC 2012 x86_64 GNU/Linux

when running parallel, i get the following error on STDERR:

$parallel echo ::: A B C
Error unlinking file ./rTrUcTv2ZS using unlink0 at /home/######/bin/parallel line 5529

Any suggestion on what this means and how to fix it?

Things I have looked into already:

• permissions I have read write permissions on all files and in the directory.

• bad install It could be a bad install. To install I used ./configure --prefix=$HOME. Here is the output of configure.log:

  This file contains any messages produced by compilers while
  running configure, to aid debugging if configure makes a mistake.
  
  It was created by parallel configure 20140622, which was
  generated by GNU Autoconf 2.69.  Invocation command line was
  
  $ ./configure --prefix=/home/######
  
  ## --------- ##
  ## Platform. ##
  ## --------- ##
  
  hostname = ######
  uname -m = x86_64
  uname -r = 2.6.32-43-server
  uname -s = Linux
  uname -v = #97-Ubuntu SMP Wed Sep 5 16:56:41 UTC 2012
  
  /usr/bin/uname -p = unknown
  /bin/uname -X     = unknown
  
  /bin/arch              = unknown
  /usr/bin/arch -k       = unknown
  /usr/convex/getsysinfo = unknown
  /usr/bin/hostinfo      = unknown
  /bin/machine           = unknown
  /usr/bin/oslevel       = unknown
  /bin/universe          = unknown
  

Curiously missing is uname -p. lscpu shows:

Architecture:          x86_64
CPU op-mode(s):        64-bit
CPU(s):                48
Thread(s) per core:    1
Core(s) per socket:    12
CPU socket(s):         4
NUMA node(s):          8
Vendor ID:             AuthenticAMD
CPU family:            16
Model:                 9
Stepping:              1
CPU MHz:               800.000
Virtualization:        AMD-V
L1d cache:             64K
L1i cache:             64K 
L2 cache:              512K
L3 cache:              5118K

It turns out the unlink error is a conflict between the NFS filesystem of my home directory and parallel's use of the File::Temp module:

> "Finally, on NFS file systems the link count of the file handle does not always go to zero immediately after unlinking. Currently, this command is expected to fail on NFS disks."

PerlDocs File::Temp Module

To fix the situation, I asked my system administrator for a sticky directory on the volume containing the root folder, which was on a ext4 file system. I then added added this to my environment variables under $TMPDIR with:

export TMPDIR=/to/the/directory

I also added this line to .bash_profile