Bug#693971: openldap FTBFS on hurd-i386

[Samuel Thibault]

Hello,

Ryan Tandy, le lun. 07 sept. 2020 14:44:40 -0700, a ecrit:
> On Wed, Aug 19, 2020 at 01:51:40PM +0200, Samuel Thibault wrote:
> > record locking support was added in libc0.3 2.29-3, so we can probably
> > try to re-enable the BDB/HDB backends on hurd-any.
> 
> I'm playing with this at the moment. The BDB backend seems to be working OK
> in single-threaded operation. However the test008-concurrency fails badly. I
> can't say at this point whether that's actually related to BDB, or just a
> more general issue around concurrency.

I had a look, it seems what happens is that in
libraries/libldap/result.c wait4msg gets EINTR from select(), and since
LDAP_BOOL_RESTART is not set, it returns LDAP_SERVER_DOWN, interpreted
as an error while EINTR simply means select() got interrupted by a
signal. After setting LDAP_BOOL_RESTART, the test passes just fine. It
does have quite a lot of such interrupted select() calls, does ldap use
signals extensively? libpthread doesn't. Perhaps it's a dependency of
openldap which does?

Samuel