Re: [Xen-users] Strange RPC error

[Andrew Ross <aross@xxxxxxxxxxxxxx>]

efphe wrote:

> I'm tryng to set up Xen, I have errors and google does not help me.
>
> The situation is simple: I installed Xen-3.0.2 on gentoo. 
By following the instructions at http://www.gentoo-wiki.com/Xen ?

Aside from the xen-related ebuilds and their dependencies, you're 
running a stable up-to-date Gentoo system?
> The Dom0 kernel is up and running, all works perfectly. 
> But when I try to start a DomU, xm raises this error:
> # xm create -c <conf_file>
> Using config file <conf_file>
> Error: <ProtocolError: RPC2/: -1>
> Log shows an error while loading the DomU:
>
> ...
> [2006-07-06 18:50:10 xend] CRITICAL (SrvDaemon:190) Xend died due to signal 6!  
> Restarting it.
You need to find out why Xend is being terminated by the kernel (ie. 
signal 6).
Make sure you have "(loglevel DEBUG)" in /etc/xen/xend-config.sxp and 
check out /var/log/{xend.log,xend-debug.log}
You may need to remerge xen with the debug USE-flag set, so debugging 
symbols will be available in any core dumps produced by xend.
Don't forget to enable core dumps by running "ulimit -c unlimted" prior 
to starting Xen. If necessary, stop xend from autostarting at boot 
("rc-update del xend default").
Once xend has been terminated with signal 6 it should produce a core 
dump, which you may have to search for using something like "find / 
-name core -type f" - you might like to read 
http://www.linuxhowtos.org/Tips%20and%20Tricks/coredump.htm to see how 
the name of core dumps can be changed.
Once you've located the core dump run "file path-to-core-dump" to see 
what program caused it, then load the program and core dump into gdb 
(which you'll need to emerge, if you don't already have it) with "gdb 
path-to-program path-to-core". At the prompt type "backtrace", which 
should help identify exactly where in xend the crash occurred.
These instructions are C-specific, so may not be as useful for a 
python-based program, such as xend. Hopefully, a xen hacker can weigh in 
on this.
Cheers

Andrew

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