Assert error in WSLR()

[Jean-Baptiste Quenot]

Hi there,

Since upgrading from Varnish 2.0.6 to Varnish 2.1.3 (both with the
Apache LogFormat patch applied) I get this error in production:

Apr 15 11:54:31 gw1 varnishd[11313]: Child (9244) Panic message:
Assert error in WSLR(), shmlog.c line 236:
 Condition(w->wlp < w->wle) not true.
thread = (cache-worker)
ident = Linux,2.6.35-28-server,x86_64,-sfile,-hcritbit,epoll
Backtrace:
 0x4235f8: /usr/sbin/varnishd() [0x4235f8]
 0x4385ed: /usr/sbin/varnishd(WSLR+0x1cd) [0x4385ed]
 0x4203cd: /usr/sbin/varnishd() [0x4203cd]
 0x4205ce: /usr/sbin/varnishd(http_DissectRequest+0xee) [0x4205ce]
 0x414360: /usr/sbin/varnishd(CNT_Session+0x670) [0x414360]
 0x424da8: /usr/sbin/varnishd() [0x424da8]
 0x42517b: /usr/sbin/varnishd() [0x42517b]
 0x7f07dcb8f971: /lib/libpthread.so.0(+0x7971) [0x7f07dcb8f971]
 0x7f07dc44e92d: /lib/libc.so.6(clone+0x6d) [0x7f07dc44e92d]
sp = 0x7efb39157008 {
 fd = 35, id = 35, xid = 1796073229,
 client = 208.80.194.37:50339,
 step = STP_START,
 handling = deliver,
 restarts = 0, esis = 0
 ws = 0x7efb39157078 {
   id = "sess",
   {s,f,r,e} = {0x7efb39157cd0,+25184,(nil),+65536},
 },
 http[req] = {
   ws = 0x7efb39157078[sess]
     "GET",
     "/some/path.html",
     "HTTP/1.0",
     "Host: some.host.com",
     "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
SV1; knst; knst2007; Editor 3.0 - http://www.e-ditor.com; .NET CLR
1.1.4322)",
 },
 worker = 0x7efb236f6be0 {
   ws = 0x7efb236f6d50 {
     id = "wrk",
     {s,f,r,e} = {0x7efb236e4b80,0x7efb236e4b80,(nil),+65536},
   },
   },
   vcl = {
     srcname = {
       "input",
       "Default",
     },
   },
},
Apr 15 11:54:31 gw1 varnishd[11313]: child (20985) Started
Apr 15 11:54:32 gw1 varnishd[11313]: Child (20985) said
Apr 15 11:54:32 gw1 varnishd[11313]: Child (20985) said Child starts
Apr 15 11:54:32 gw1 varnishd[11313]: Child (20985) said managed to
mmap 53687091200 bytes of 53687091200

Does it ring a bell to you?

Thanks in advance,
-- 
Jean-Baptiste Quenot