Re: RE_23 hangs in test039 (back-hdb)

["Pierangelo Masarati" <ando@sys-net.it>]

> Pierangelo Masarati wrote:

> I ran test039 repeatedly for a couple of hours with no hangs on my
> dual-core x86_64 Linux system. I'll try looping the other tests as well.

I recently had a hang of different nature, which is highlighted by your
fix but has different root cause, and might explain other hangs we were
seeing; in back-ldap/bind.c there's this code:


static int
ldap_back_dobind_int(
        ldapconn_t              *lc,
        Operation               *op,
        SlapReply               *rs,
        ldap_back_send_t        sendok,
        int                     retries,
        int                     dolock )
{

<snip>

        while ( lc->lc_refcnt > 1 ) {
                ldap_pvt_thread_yield();
                if (( rc = LDAP_BACK_CONN_ISBOUND( lc )))
                        return rc;
        }

slapd was looping here in the only active thread, so apparently something
occurred which caused back ldap to not release a connection.  Things could
be fixed here, introducing some means (timeout?) to escape this loop, but
this would cure the symptom, not the root cause.  I'm trying to trace it.

p.



Ing. Pierangelo Masarati
Responsabile Open Solution
OpenLDAP Core Team

SysNet s.n.c.
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