Comment 3 for bug 1407768

Another observation :

If I run dcmitool simultaneously from two different shells it fails in one of the shell with above error message.

The reason why we saw the above error message consistently was because we wrapped dcmitool in collectd exec plugin.
For some reason collectd spawns two or more instances of exec plugin causing some commands to fail. This failure rate
keeps on increasing to a point where all dcmitool issued commands fail.

Hope this provides more insight.