RE: replica slapd core dumped under load

["Howard Chu" <hyc@highlandsun.com>]

> -----Original Message-----
> From: owner-openldap-software@OpenLDAP.org
> [mailto:owner-openldap-software@OpenLDAP.org]On Behalf Of Alex Deiter

> Can anyone help with this ?
>
> I'm running OpenLDAP 2.2.5 with a bdb db-4.2.52 backend on
> FreeBSD 5.2. Master server work fine, but replica server
> periodically core dumps(during times of high load):

Your stack trace indicates a crash in your C library. Since malloc shows up
in the trace, you may simply have run out of RAM on the machine. The syslog()
invocation in this case is using a simple string constant, so there's no
possibility of invalid parameters being passed. This is most likely either
out-of-memory, a corrupted heap, or a FreeBSD libc bug.

> (gdb) bt
> #0  0x28433dcf in kill () from /lib/libc.so.5
> #1  0x28428878 in raise () from /lib/libc.so.5
> #2  0x284a0f82 in abort () from /lib/libc.so.5
> #3  0x2849f6fe in tcflow () from /lib/libc.so.5
> #4  0x2849ff9b in tcflow () from /lib/libc.so.5
> #5  0x284a0356 in malloc () from /lib/libc.so.5
> #6  0x2849df06 in __smakebuf () from /lib/libc.so.5
> #7  0x2849de7d in __swsetup () from /lib/libc.so.5
> #8  0x2849413a in __vfprintf () from /lib/libc.so.5
> #9  0x284940a6 in vfprintf () from /lib/libc.so.5
> #10 0x28480d6d in fprintf () from /lib/libc.so.5
> #11 0x2847d607 in vsyslog () from /lib/libc.so.5
> #12 0x2847d4ed in syslog () from /lib/libc.so.5
> #13 0x0809f216 in bdb_modify_internal (op=0xbeeeaba0,
> tid=0x8b4b200, modlist=0x284af120,
>     e=0xbeeea610, text=0xbeeea7e4, textbuf=0xbeeea670 "\020",
> textlen=256) at modify.c:106
> #14 0x080a01d6 in bdb_modify (op=0xbeeeaba0, rs=0xbeeea7d0)
> at modify.c:532
> #15 0x0809b788 in syncrepl_updateCookie (si=0x81bab00,
> op=0xbeeeaba0, pdn=0x0,
>     syncCookie=0x0) at syncrepl.c:1568
> #16 0x080991a2 in do_syncrep2 (op=0xbeeeaba0, si=0x81bab00)
> at syncrepl.c:515
> #17 0x0809a01a in do_syncrepl (ctx=0xbeeeae40, arg=0x81d5120)
> at syncrepl.c:845
> #18 0x28141df7 in ldap_int_thread_pool_wrapper
> (xpool=0x8164580) at tpool.c:467
> #19 0x283ce50e in _thread_start () from /usr/lib/libc_r.so.5
> (gdb)


  -- Howard Chu
  Chief Architect, Symas Corp.       Director, Highland Sun
  http://www.symas.com               http://highlandsun.com/hyc
  Symas: Premier OpenSource Development and Support