Segmentation fault - 64bit - websockets

Community Support
1

Dear kdb community,

I am running identical q scripts on 2 parallel kdb engines, that feed data from websockets. One is a 64bit package on a 64bit computer. The other a 32bit package on a 32bit computer. The 32bit script runs without any errors. The 64bit script runs for about 5 minutes before exiting with a segmentation fault.

I’m not at liberty to post the full code on this forum but does anybody have an idea why there would be a segmentation fault on a 64bit system and not 32bit? If not, is it possible to run the 32bit kbd package on a 64bit system?

Faithfully,

Alexander

2

Hi Alexander,


the same release of kdb+ for 32 and 64bit should behave the same (address-space permitting). Neither should crash!

Please consider the following:


https://code.kx.com/q/about/kxtechnology/#reporting-bugs-in-kx-products


if you see a stack-trace printed during the crash, please include that in any email to us.


In the meantime, yes, you can run 32bit processes on a 64bit OS, assuming the relevant multiarch libs are in place.

thanks

3

Thank you Charles,

Here was what was printed in the console during the crash.

Sorry, this application or an associated library has encountered a fatal error and will exit.
If known, please email the steps to reproduce this error to tech@kx.com
with a copy of the kdb+ startup banner.
Thank you.
q() [0x47a9c1]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x110c0) [0x7f9451fb40c0]
/lib/x86_64-linux-gnu/libc.so.6(+0x399c58) [0x7f9451f9dc58]
./streamorders.sh: line 12:  7609 Segmentation fault      q feed/loadexchanges.q -p 5000

Faithfully,

Alexander