Re: [libvirt-users] Bug? virGetLastError() returns NULL after virDomainCreate() if Domain running already
Am Donnerstag, 23. Februar 2012, 13:40:03 I wrote:
Am Mittwoch, 22. Februar 2012, 11:26:50 schrieb Eric Blake:
> Can you post the code snippet you are using to get this situation?
Unfortunately, the problem occurs inside a fairly large, and unfortunately
not Open-Source, C++ program. I will try to reduce it to a minimal testcase
as soon as I get around to it.
Okay, I wrote a minimal testcase that does just the operations that lead to
the problem, only to find out that this won't reproduce the bug either :-\
That means either I'm inadvertently triggering some rare corner case here who
knows where in my code, or the bug is really in my code. I don't think it's
the latter, though, because the relevant part of my code looks like this:
if(virDomainCreate(vserver.get_virdomain().get()) != 0) {
// TODO clean up pointer
virErrorPtr error = virGetLastError();
if(error != 0) {
syslog(LOG_ERR, "Could not start vserver, error code: %d", error->code);
// VIR_ERR_OPERATION_INVALID means the vm was already in a started state
if(error->code != VIR_ERR_OPERATION_INVALID)
throw std::runtime_error("Could not start vserver");
}
else {
syslog(LOG_ERR, "Could not start vserver, no error code from libvirt");
throw std::runtime_error("Could not start vserver, no error code from
libvirt");
}
}
There's nothing in there between calling virDomainCreate() and
virGetLastError(). There are no other threads, either.
Anyway, I've fired up gdb now to see if I can find out where the error object
gets lost.
Guido