Sometimes recovery-small tests 50-52 failed on 8 CPU box. with leak a export reference. After some investigation i see nodemap don't able to found own entry for an export, but export still linked to node map. (i don't know why intel land something without any debug options in code?). per additional investigation i see someone

commit 83f04354ff68a14d7492e35a9576c91492a1206c
Author: Joshua Walgenbach <jjw@iu.edu>
Date: Mon Mar 3 09:10:20 2014 +0100

LU-4647 nodemap: add mapping functional
Signed-off-by: Joshua Walgenbach <jjw@iu.edu>
Signed-off-by: Kit Westneat <kit.westneat@gmail.com>
Reviewed-on: http://review.whamcloud.com/9299
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>

have a bad inspection and allow to "hash" an export pointer as string.
so if any byte will be changed in export after add - we don't able to find something in hash.