selftest and logfile output

Michael Adam obnox at
Thu Mar 1 18:20:20 MST 2012

Hi Andrew,

Andrew Bartlett wrote:
> On Fri, 2012-03-02 at 01:12 +0100, Michael Adam wrote:
> > Hi!
> > 
> > Andrew Bartlett wrote:
> > > On Thu, 2012-03-01 at 23:38 +0100, Volker Lendecke wrote:
> > > > On Wed, Feb 29, 2012 at 12:41:13AM +0100, Volker Lendecke wrote:
> > > > 
> > > > I have no clue how to debug this in the autobuild system on
> > > > sn-devel. Cranking up the debug level of smbd to 10 makes it
> > > > fail much earlier, also with the unmodified master.
> > > 
> > > Just a heads-up.  I know you will find this infuriating, but the make
> > > test failure with debug level 10 might be a red herring.  Any output
> > > line, including from a DEBUG() starting with 'error' is counted by
> > > subunit as a failure, and so will cause an autobuild to fail.  
> > 
> > That sounds utterly wrong. I was already wondering why smbd was
> > not logging to the log file but to stdout (or err) in make test.
> > WHy is that? imho it should log to a log file.
> If the logs are put to a file, then they are essentially lost in the
> selftest system.  A developer interactively debugging the system would
> know where to look, but they will not show up in the build farm nor be
> highlighted in the results of a failing test. 

Hmmm, I may be wrong, but I'd say that the log files are for
human debugging, and not for automatic test success checking.
For the latter we have exit codes And maybe messages to

What exactly makes it necessary to have the log of samba parsed
by the selftest system? We could also use the syslog thresold
to have low level debug msgs intercepted by the selftest system,
if this is strictly necessary...

Just my 2cents...

Cheers - Michael

> That said, this situation clearly isn't perfect.  Some improvements
> could be for foreground logging to include the debug header and
> second-line indent, which may avoid the subunit keyword issue.  We also
> seem to have lost the logs from forked child daemons in s3 (they don't
> seem to filter back out the main stderr).  Clearly we should also have a
> way not to log to the foreground, for intensive debugging sessions where
> intact logfiles of successful tests may be valuable for analysis. 
> I hope this clarifies things,
> Andrew Bartlett
> -- 
> Andrew Bartlett                      
> Authentication Developer, Samba Team 
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