[Samba] Possible bug with Samba and LDAP

[Jeremy Allison]

On Thu, Nov 04, 2004 at 04:04:44PM -0800, Erik Horn wrote:
> Configuration Overview:
> 
> OS:		Fedora Core 2
> Samba:	3.0.7-2  (as distributed) configured as a PDC using ldap for
> authentication info
> LDAP:		openldap 2.1.29
> 	
> 
> Ever since we upgraded to Samba 3 we've been having problems with users
> randomly getting disconnected from our server. I have managed to trace the
> problem down to our LDAP server. Our LDAP server is configured with
> idletimeout 60. This closes any ldap connections that are idle for more
> than a minute, which keeps the number of open connections to the ldap
> server down to a reasonable level (around 100) rather than one per active
> session on the server (1000+).
> 
> After Samba gets disconnected from the LDAP server, then tries to access
> it, it receives a SIGPIPE and dies, disconnecting the user. Ideally, Samba
> should re-attach to the LDAP server and continue working without any
> problems.
> 
> This same LDAP server option was used for years with Samba 2.x without any
> problems.

What client libraries are you using ? Samba is configured to ignore sigpipe.
Something dynamically linked into your smbd binary is re-enabling it.

Jeremy.