stdout redirect. sh: resource temporarily unavailable

I have large batches of bash processes. Each bash script invokes executeables which have their stdout redirected to distinct log files. About 5% of the runs end up with: _sh: [name of log]: Resource temporarily unavailable_ I tried to reduce amount of jobs running in parallel, but still the error persisted on some of the bash scripts. ### Additional info: ### - Ubuntu 14.04 LTS running on VM using ESXi - Happens on a new partition, allocated with gparted and LVM (new logical volume consisting of the entire partition) - The LV is exported using nfs-kernel-server - The LV is also shared to windows using Samba - The LV is formatted using ext4 - I have admin rights on this machine ### More detailed info ### - Everything is run in a cluster, using Sun-Grid-Engine - There are 4 virtual machines: m1, m2, m3, m4 - m1 runs sge master, sge exec, and ldap server - m2, m3, m4 run sge exec - m3 runs nfs-kernel-server, exporting a _home_ folder sitting in logical volume (using LVM) that uses a partition on a local disk, to m1, m2, m4 - m3 has a soft link to the _home_ folder - m1, m2, m4 mount the _home_ folder through fstab, so all machines end up pointing to the same _home_ folder - m3, m2, m4 run ldap clients, connecting to m1 - All jobs are submitted to the cluster through m1 (configured as a submission host) - Jobs fail exclusively on m3 (which exports the disk). Most of the jobs on m3 are passing though. Failures are random, but consistently on m3 alone. - m3 also shares the _home_ via samba to windows clients Any help would be greatly appreciated :) (how to debug, which logs are relevant, how to get more info out of the system, etc...) Thank you in advance!