Here is the data I have at the moment:
* Server crashes every 40 page requests
(times 39 dependent files, i.e. js, css, ajax, etc)
* Only one thread per page request is used (background delivery
mechanism). Hence, the number 40 matches the allowable
maxthreads/minthreads (see configuration below).
* Crashes with/without zippy allocator.
* Crashes with/without HackContentEncoding.
* gdb output:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 49156 (LWP 29203)]
0xb7f433cc in Ns_SetFindCmp () from
/opt/naviserver-4.99.2/lib/libnsd.so
(gdb) continue
Continuing.
Program received signal SIGABRT, Aborted.
0xb7d30c51 in kill () from /lib/libc.so.6
* However, the Ns_SetFindCmp code does not seem to be the culprit.
* Request handler is as follows:
proc ::defaultRequestHandler {args} {
set o [::xo::RequestHandler new]
$o respond
$o destroy
#ns_set cleanup
return
}
foreach method {GET HEAD POST} {
ns_register_proc $method / ::defaultRequestHandler
}
* If you uncomment the "ns_set cleanup" line, no fatal signal is
received. However, a server error occurs at the threshold (40 requests
times 39 dependent files) due to the fact that the form-conn ns_set is
not found (I haven't checked how NS uses sets per thread (my guess is
that it creates a persistent ns_set per thread).
* NS configuration synopsis:
- 4.99.1 init.tcl (see previous thread, i.e. xotcl)
- without nstrace
- progressminsize/uploadsize 10000 bytes
- 4 spooler writer/reader
- MaxThreads 40
- MinThreads 40
- MaxConnections 120
- MaxDropped 0
I plan to investigate this further in the following days. If you have
any suggestions/comments/help please do not hesitate to post (or contact
me).
Best wishes,
Neophytos
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