upgrade problem

[Ben Collins]

On Thu, Nov 09, 2000 at 03:32:26PM +0100, Frederic Lepied wrote:
> Ben Collins <bcollins@debian.org> writes:
> 
> > On Thu, Nov 09, 2000 at 11:09:56AM +0100, Frederic Lepied wrote:
> > > I have an upgrade problem from glibc 2.1.3 to glibc 2.1.97. When the
> > > glibc is updated on the system, a lot of applications stop resolving
> > > names and looking up user info. For example openssh server doesn't
> > > work anymore without a restart.
> > > 
> > > After instrumenting the glibc 2.1.3, I found that dynamic loading of
> > > the libnss was failing.  It seems to come from the new libnss* 2.1.97
> > > libs that need symbols from GLIBC 2.2 which are not present because
> > > the running programs are still linked with the 2.1.3 glibc.
> > 
> > This was the same with the 2.0 -> 2.1 upgrade. I've been dealing with this
> > problem myself, and although there is nothing to fix it now (can't go back
> > and fix glibc 2.1.3), I've thought about some possible solutions, but they
> > all seem like hacks.
> > 
> > Why don't the modules stay loaded after the first call to them? I thought
> > the answer to this was because nsswitch.conf might change, and the modules
> > were unloaded in case that changed, but the nss functions don't seem to
> > reread this file. Why not leave the modules loaded in memory after the
> > first dlopen (<- questions is directed at libc-alpha, not you :)?
> > 
> 
> >From what I have seen, the modules stay loaded but the problem appears
> for forking daemons like sshd which loads the module only after the
> fork... I'm right or I have missed something ?

Maybe that's the problem. I've noticed with forked daemons from inetd.
Also apache, slapd, wu-ftpd, almost all mail daemons (exim, smail,
postfix, sendmail).

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