Re: Any know problems with worker MPM and mod_dav_svn?

Philip Martin <philip@codematters.co.uk> writes:

> Justin Erenkrantz <jerenkrantz@apache.org> writes:
>
> > > I've been experimenting and I'm seeing occasional failures when
> > > using Apache's worker MPM that I don't see when using the prefork
> > > MPM. Are there any known issues combining mod_dav_svn and worker?
> >
> > Hmm. Shouldn't be.
>
> Then I better not ignore the probem!
>
> > > The errors occur at commit, one is a failure to read the repository
> > > format file and the other is a failure to open the db lock file.
> > > They are transient, an earlier commit has succeeded and a later
> > > commit also works.
> >
> > Can you consistently reproduce this transient error? (Does it happen
> > once out of every five times you try?)

I believe I have traced the problem to the UTF8 conversion. When the
file opening errors occur the fname_native string in svn_io_open_file
is complete rubbish, the fname input is correct.

The following hack to disable UTF8

Index: ../svn/subversion/libsvn_subr/utf.c
===================================================================
--- ../svn/subversion/libsvn_subr/utf.c (revision 3683)
+++ ../svn/subversion/libsvn_subr/utf.c (working copy)
@@ -99,6 +99,9 @@
   apr_pool_t *parent, *global_pool;
   apr_status_t apr_err;
 
+ *ret = NULL;
+ return SVN_NO_ERROR;
+
   /* ### I'm worried about the performance implications of searching
    * up the pool tree every time we call this function. Leaving it in
    * for now, but if this turns out to be a bottleneck, then we should

has allowed me to commit hundreds of revisions in my test scenario.
When UTF8 conversion is enabled I usually get the problem in less than
40 revisions.

This is a Debian/Linux box using libc6 2.2.5-11.2, and APRUTIL is
configured to use the system iconv. As far as I know the conversions
are all trivial, I'm not using any non-ASCII characters (but all this
UTF8 stuff is black magic to me :)

So my question becomes: any known threading problems with iconv?

-- 
Philip Martin
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