Hello All,

We are running some old versions of gazebo.  It is gazebo-0.5.2, on some FC6 
i386 machines.  Every now and then a user will start getting, "failed to query 
semaphore" errors from gazebo and gazebo will not start.

Looking at the sources it is originating from gz_client.c.  But I can not 
figure out what is causing this error to be raised?

They say that the only way to get gazebo to work once this starts is to reboot 
the whole system.

Is there some sort of kernel parameters that should be increased or do you 
think rebooting is the only way out of this?

TIA
-- 
Jim Summers
School of Computer Science-University of Oklahoma
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