Re: [Xen-devel] upgrading Xen3.0.4-1 to Xen-unstable ...

[Ewan Mellor <ewan@xxxxxxxxxxxxx>]

On Fri, Mar 16, 2007 at 08:45:59PM -0400, Parissa Heidari wrote:

> On Friday 16 March 2007 20:10, Keir Fraser wrote:
> > On 16/3/07 23:38, "Parissa Heidari" <parisa.heidari@xxxxxxxxxx> wrote:
> > > It seems that xend is updated in /etc/init.d and usr/sbin. Regarding to
> > > some previous posts on the users mailing-list I have deleted
> > > /lib/usr/python/xen and rerun make install but there is no improvement.
> > > Also I have rerun make all, make install in the tools directory but still
> > > no improvement!
> > > Is there any other solution for this?
> >
> > Have you also tried deleting /etc/xen (assuming you have no manual config
> > updates in there that you want to keep)?
> >
> yes, but it didn't help.
> > You can also look in /var/log/xen/xend.log to see if xend had anything to
> > say about why it didn't start up.
> 
> Oh! It seems I have found some thing! /var/log/xen/xend.log is empty but 
> there  
> are a lot of lines in /var/log/xen/xend-debug.log. It says somthing 
> about  /usr/lib/python2.4 and as I see the contents of this directory are not 
> updated from last february (when I installed xen3.0.4). What is going wrong? 
> what should I do to make it updated?
> I tried to rename it and rerun "sh install.sh" in dist directory but it 
> caused 
> some error messages!
> 
> Great thanks for your helps and here's what I see in  xend-debug.log:
> 
> Xend started at Fri Mar 16 20:24:58 2007.
> Exception starting xend: list index out of range
> Traceback (most recent call last):
>   File "/usr/sbin/xend", line 130, in ?
>     sys.exit(main())
>   File "/usr/sbin/xend", line 108, in main
>     return daemon.start()
>   
> File 
> "/home/parisa/XenoLTTng/xen-unstable-lttng.hg/dist/install/usr/lib/python/xen/xend/server/SrvDaemon.py",
>  
> line 232, in start
>     self.run(w and os.fdopen(w, 'w') or None)
>   
> File 
> "/home/parisa/XenoLTTng/xen-unstable-lttng.hg/dist/install/usr/lib/python/xen/xend/server/SrvDaemon.py",
>  
> line 344, in run
>     log.exception("Exception starting xend (%s)" % ex)
>   File "/usr/lib/python2.4/site-packages/cairo/__init__.py", line 1005, in 
> exception
> 
>   File "/usr/lib/python2.4/site-packages/cairo/__init__.py", line 999, in 
> error
> 
>   File "/usr/lib/python2.4/site-packages/cairo/__init__.py", line 1072, in 
> _log
> 
>   
> File 
> "/home/parisa/XenoLTTng/xen-unstable-lttng.hg/dist/install/usr/lib/python/xen/xend/XendLogging.py",
>  
> line 50, in findCaller
>     frames = inspect.stack()
>   File "/usr/lib/python2.4/inspect.py", line 812, in stack
>     return getouterframes(sys._getframe(1), context)
>   File "/usr/lib/python2.4/inspect.py", line 793, in getouterframes
>     framelist.append((frame,) + getframeinfo(frame, context))
>   File "/usr/lib/python2.4/inspect.py", line 768, in getframeinfo
>     lines, lnum = findsource(frame)
>   File "/usr/lib/python2.4/inspect.py", line 437, in findsource
>     if pat.match(lines[lnum]): break
> IndexError: list index out of range
> Traceback (most recent call last):
>   File "/usr/sbin/xend", line 130, in ?
> sys.exit(main())
>   File "/usr/sbin/xend", line 108, in main
>     return daemon.start()

Does this patch help?  Let me know whether this fixes the problem, or changes
the error output in some way.  If it helps, I'll check this in.

Ewan.


diff -r 1e592e4557c1 tools/python/xen/xend/XendLogging.py
--- a/tools/python/xen/xend/XendLogging.py      Fri Mar 16 18:06:43 2007 +0000
+++ b/tools/python/xen/xend/XendLogging.py      Sat Mar 17 11:09:24 2007 +0000
@@ -58,6 +58,18 @@ if 'TRACE' not in logging.__dict__:
                 else:
                     return filename, frame[2]
     logging.Logger.findCaller = findCaller
+
+    # Work around a bug in Python's inspect module: findsource is supposed to
+    # raise IOError if it fails, with other functions in that module coping
+    # with that, but some people are seeing IndexError raised from there.
+    if hasattr(inspect, 'findsource'):
+        real_findsource = getattr(inspect, 'findsource')
+        def findsource(*args, **kwargs):
+            try:
+                return real_findsource(*args, **kwargs)
+            except IndexError, exn:
+                raise IOError(exn)
+        inspect.findsource = findsource
 
 
 log = logging.getLogger("xend")

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