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gatsby 09-15-2016 04:06 PM

Signal 7/SIGBUS
 
Hey all -

I recently got a signal 7 show up in my system logs related to a process (gnome). When I looked closer, it said this event was caused by SIGBUS. What does that typically mean? I see some resources in Linux programming references on the web about it but has anyone come across this sort of thing before crashing their services?

Thanks

jpollard 09-15-2016 04:55 PM

It may depend on which hardware it is on.

SIGBUS is usually a hardware error. I used to see it many (many many) years ago due to a device failure attached to the system bus. You can also get it with unaligned data transfers.

I'm not sure what it would relate to on current systems.

Perhaps this would help explain it.

http://stackoverflow.com/questions/2...s-on-x86-linux

gatsby 09-16-2016 08:19 AM

Thanks for that link. What was confusing me a bit on this is that the server is a VM. From that link, it sounds like it could also be an application error (requesting memory location that doesn't exist), or maybe even an IO problem?

jpollard 09-16-2016 08:41 AM

Quote:

Originally Posted by gatsby (Post 5606039)
Thanks for that link. What was confusing me a bit on this is that the server is a VM. From that link, it sounds like it could also be an application error (requesting memory location that doesn't exist), or maybe even an IO problem?

More likely an application error (using a pointer improperly type of thing). Usually an I/O error would be detected by the host rather than the VM as it has to modulate the I/O requests to prevent security problems.


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