Abdelkader Chelouah wrote:
> Hi,
>
> slapd 2.4.44
>
> OpenLDAP instance configure as a proxy (back-ldap)
>
>
> From time to time, bind operations can take more than 5 sec. These latencies
> do not seem to come from a CPU or memory problem. I'm trying to see if the
> network
> can be the root cause of the issue. To debug the fonction ldap_sasl_bind
> (libraries/libldap/sasl.c), I activated trace loglevel (logs are manage by
> rsyslog). In
> the definition of ldap_sasl_bind, there is
>
> Debug( LDAP_DEBUG_TRACE, "ldap_sasl_bind\n", 0, 0, 0 );
>
> A least the message "ldap_sasl_bind" should appear in logs, which is not the
> case. Actually, Debug (which is first defined in include/ldap_log.h) is
> redefined
> in libraries/libldap/ldap-int.h
>
> ...
>
> #include "ldap_log.h"
>
> #undef Debug
>
> #ifdef LDAP_DEBUG
>
> #define DebugTest( level ) \
> ( ldap_debug & level )
>
> #define Debug( level, fmt, arg1, arg2, arg3 ) \
> do { if ( ldap_debug & level ) \
> ldap_log_printf( NULL, (level), (fmt), (arg1), (arg2), (arg3) ); \
> } while ( 0 )
>
> #define LDAP_Debug( subsystem, level, fmt, arg1, arg2, arg3 )\
> ldap_log_printf( NULL, (level), (fmt), (arg1), (arg2), (arg3) )
> configure
> #else
>
> #define DebugTest( level ) (0 == 1)
> #define Debug( level, fmt, arg1, arg2, arg3 ) ((void)0)
> #define LDAP_Debug( subsystem, level, fmt, arg1, arg2, arg3 ) ((void)0)
>
> #endif /* LDAP_DEBUG */
>
> ...
>
> A a result, the message is send to standard output. By using rsyslog, it is
> not possible to catch any message inside ldap_sasl_bind.
>
>
> How to get stdout and stderr messages and still use rsyslog to manage
> openldap logs ?
syslog is not fast enough to handle the debug traffic.
You could use ber_set_option() to override the log output functions, and have
them write
messages both to rsyslog and stderr. But using syslog on every debug message
will slow
things down more than 10x.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
