Apache Core Dump (segfault)

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My apache server in last few days become give me core dump, this happened when i added around 8 new domains and restart my server gracefully it core dumped, i debug this issue and start to analyze the problem, i found when i delete the last added hosts it worked  fine, then i stareted to add them one by one and i reached to the point that no more hosts can be added i removed on of my old vhosts so i added one instead of it, so it sounds like i reach a limit number so i cannot add more sites , i searched the  internet and i found that there are no limit on number of vhosts in apache but may be something related to my OS limitation on file descriptor, my system is

OS: FreeBSD 6.1 stable
Apache: 2.2.4
i used ulimit -n 30000, and sysctl kern.maxfiles 30000

but the same issue , today i add coredumpdirectory to my config file and tried to debug the result and here is the gdb result

(gdb) bt full
#0  0x28497461 in ?? ()
No symbol table info available.
#1  0xbfbfeb4b in ?? ()
No symbol table info available.
#2  0x00000080 in ?? ()
No symbol table info available.
#3  0xbfbfec28 in ?? ()
No symbol table info available.
#4  0x284efe54 in ?? ()
No symbol table info available.
#5  0x283cdc42 in ?? ()
No symbol table info available.
#6  0x080aa3e8 in http_cmds ()
No symbol table info available.
#7  0xbfbfea98 in ?? ()
No symbol table info available.
#8  0x28496ab2 in ?? ()
No symbol table info available.
#9  0x00000000 in ?? ()
No symbol table info available.
#10 0x283d1e58 in ?? ()
No symbol table info available.
#11 0xbfbfec28 in ?? ()
No symbol table info available.
#12 0x283c171d in ?? ()
No symbol table info available.
#13 0xbfbfea70 in ?? ()
No symbol table info available.
#14 0x00000004 in ?? ()
No symbol table info available.
#15 0x00000010 in ?? ()
No symbol table info available.
#16 0x28314508 in ?? ()
No symbol table info available.
#17 0x00000002 in ?? ()
No symbol table info available.
#18 0x00000088 in ?? ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#19 0x080aa3b0 in http_cmds ()
No symbol table info available.
#20 0x080aa330 in http_cmds ()
No symbol table info available.
#21 0x46a84949 in ?? ()
No symbol table info available.
#22 0x0001746f in ?? ()
No symbol table info available.
#23 0x00000044 in ?? ()
No symbol table info available.
#24 0x28314508 in ?? ()
No symbol table info available.
#25 0x28003835 in ?? ()
No symbol table info available.
#26 0x00000000 in ?? ()
No symbol table info available.
#27 0xbfbfeb88 in ?? ()
No symbol table info available.
#28 0x282aa63b in ?? ()
No symbol table info available.
#29 0x089d0ec0 in ?? ()
No symbol table info available.
#30 0x00000001 in ?? ()
No symbol table info available.
#31 0x00000000 in ?? ()
No symbol table info available.
#32 0x00000010 in ?? ()
No symbol table info available.
#33 0x080a3000 in ap_bucket_type_error ()
No symbol table info available.
#34 0x080a3000 in ap_bucket_type_error ()
No symbol table info available.
#35 0xbfbfeb18 in ?? ()
No symbol table info available.
#36 0x00000000 in ?? ()
No symbol table info available.
#37 0x089d8000 in ?? ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#38 0x00002000 in ?? ()
No symbol table info available.
#39 0x00000000 in ?? ()
No symbol table info available.
#40 0x00000044 in ?? ()
No symbol table info available.
#41 0x2830a4c9 in ?? ()
No symbol table info available.
#42 0x00040000 in ?? ()
No symbol table info available.
#43 0xbfbfeb48 in ?? ()
No symbol table info available.
#44 0x282338fe in ?? ()
No symbol table info available.
#45 0x080a3000 in ap_bucket_type_error ()
No symbol table info available.
#46 0x00000001 in ?? ()
No symbol table info available.
#47 0x00000004 in ?? ()
No symbol table info available.
#48 0x282338ca in ?? ()
No symbol table info available.
#49 0x00000000 in ?? ()
No symbol table info available.
#50 0x00000011 in ?? ()
No symbol table info available.
#51 0x089db020 in ?? ()
No symbol table info available.
#52 0x00000004 in ?? ()
No symbol table info available.
#53 0x00000561 in ?? ()
No symbol table info available.
#54 0x08264370 in ?? ()
No symbol table info available.
#55 0xbfbfeb78 in ?? ()
No symbol table info available.
#56 0x286c9109 in ?? ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#57 0xbfbfec18 in ?? ()
No symbol table info available.
#58 0x080aa330 in http_cmds ()
No symbol table info available.
#59 0xbfbfeba8 in ?? ()
No symbol table info available.
#60 0x2824c4b4 in ?? ()
No symbol table info available.
#61 0x08b49900 in ?? ()
No symbol table info available.
#62 0x00000000 in ?? ()
No symbol table info available.
#63 0xbfbfeb88 in ?? ()
No symbol table info available.
#64 0x2824a14b in ?? ()
No symbol table info available.
#65 0x2830a4c9 in ?? ()
No symbol table info available.
#66 0xbfbfebb0 in ?? ()
No symbol table info available.
#67 0xbfbfebe8 in ?? ()
No symbol table info available.
#68 0x28206c08 in ?? ()
No symbol table info available.
#69 0x2824c4b4 in ?? ()
No symbol table info available.
#70 0x08b49900 in ?? ()
No symbol table info available.
#71 0xbfbfebc8 in ?? ()
No symbol table info available.
#72 0x2823bba2 in ?? ()
No symbol table info available.
#73 0x08b49900 in ?? ()
No symbol table info available.
#74 0x00000002 in ?? ()
No symbol table info available.
#75 0x00000010 in ?? ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#76 0x28206c08 in ?? ()
No symbol table info available.
#77 0x080ac018 in mime_cmds ()
No symbol table info available.
#78 0x080eac60 in ?? ()
No symbol table info available.
#79 0xbfbfebc8 in ?? ()
No symbol table info available.
#80 0x282075af in ?? ()
No symbol table info available.
#81 0x080ac018 in mime_cmds ()
No symbol table info available.
#82 0x00000010 in ?? ()
No symbol table info available.
#83 0x00000010 in ?? ()
No symbol table info available.
#84 0x2821316c in ?? ()
No symbol table info available.
#85 0x080ac018 in mime_cmds ()
No symbol table info available.
#86 0x080ac018 in mime_cmds ()
No symbol table info available.
#87 0xbfbfebe8 in ?? ()
No symbol table info available.
#88 0x282075af in ?? ()
No symbol table info available.
#89 0x080ac018 in mime_cmds ()
No symbol table info available.
#90 0x00000010 in ?? ()
No symbol table info available.
#91 0x282053c0 in ?? ()
No symbol table info available.
#92 0x283d1e58 in ?? ()
No symbol table info available.
#93 0x08102018 in ?? ()
No symbol table info available.
#94 0x283cad93 in ?? ()
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#95 0xbfbfec18 in ?? ()
No symbol table info available.
#96 0x08074d53 in log_error_core (file=0xbfbfeab0 "\002", line=22, level=0, status=675094104, s=0xbfbfec28, c=0x2, r=0xbfbfea70, pool=0x4,
    fmt=0x10 <Address 0x10 out of bounds>, args=0x28314508 "D4\f") at log.c:570
        errstr = "tes of entropy\n\000\214\000\000\000�꿿\002\000\000\0000\000\000 \000connection_aborted\000\b�ʿ�\r\000\000\000�꿿\214\000\000\000�꿿\002 \000\000\000 \000\000\000headers_list\000꿿\214\000\000\000�꿿\002\000\000\000 \000\000\000headers_sent\000꿿\214\000\000\000�꿿\002\000\000\000 \000\000\000header\000�\r\000\000\000�꿿\214\000\000\000�꿿\002\000\000 \000 \000\000\000setrawcookie\000꿿\214\000\000\000�꿿"...
        scratch = "\214\000\000\000�꿿\002\000\000\0000\000\000\000array_intersect_assoc \000��\021\000\000\000�꿿\214\000\000\000�꿿\002\000\000\000 \000\000\000array_uintersect\000\000\000\000�꿿\002\000\000\0000\000\000 \000array_intersect_ukey\000���\024\000\000\000�꿿\214\000\000\000�꿿\002 \000\000\0000\000\000\000array_intersect_key\0000���\020\000\000\000�꿿 \214\000\000\000�꿿\002\000\000\000 \000\000\000array_in"...
        len = 676170676
        errstrlen = 0
        logf = (apr_file_t *) 0xbf00636f
        referer = 0x1 <Address 0x1 out of bounds>
        level_and_mask = 1936941407
Previous frame inner to this frame (corrupt stack?)


so please i cannot find where to start the solution, any one has an idea about this

-- 
Best regards,
*********************************************
Khaled J. Hussein
System Manager
Hadara Technologies Group
khaled@xxxxxxxxxx
http://www.palnet.com
Tel. +972 2-240-3434   
Fax. +972 2-240-3430
**********************************************
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