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From MK>
Subject illegal instruction 4
Date Thu, 07 Jul 2011 14:33:59 GMT
I have a mod_perl based module running a service on an openVZ slice.
It was working fine for a few weeks, but when I went to use it today I
get delivered an empty page and in the apache error.log:

child exit signal Illegal instruction (4)

Which AFAIK is a very strange thing (SIGILL); actual perl errors are
usually explicit, and passed on from the interpreter. To make sure the
problem wasn't in my code, I replaced the module with a one liner:

sub handler {
       return SERVER_ERROR;

Same thing.  Ie, suddenly perl modules are working.  I did not compile
apache or mod_perl myself.

Anyone have any ideas about how I can solve this or debug it further?
I have been playing around with small max stack sizes (ulimit -s 256),
but resetting that to 8192 and restarting apache did not alleviate the

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