Здравствуйте

наблюдал за графиком активности nginx (в munin) и вдруг график NGINX STATUS (Active connections, Reading, Writing, Waiting) лавинообразно зашкалил до 800 connections хотя на графике NGINX REQUESTS всё было в норме в среднем 20 r/s.

полез в логи

вот после этой строки

[color=#FF0000]2010/11/04 16:48:12 [alert] 2315#0: *54931098 writev() failed (22: Invalid argument) while sending to client, client: 81.20
0.59.198, server: _, request: "GET /index.php?id=1587&qid=12&ssid=NULL%20LIMIT%200%20UNION%20SELECT%20CHAR%2853%2C88%2C55%2
C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%
2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55
%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C5
5%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C
55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2
C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%
2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88
%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C8
8%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C
88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2
C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%
2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853
%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%285
3%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%28
53%2C88%2C55%2C80%2C81%2C100%2C106%2C99%2C79%2C51%29%2CCHAR%2853%2C88%2C55%2C80[/color]

в логах пошёл сегфолт

[color=#FF0000]*** glibc detected *** nginx: worker process: free(): invalid next size (fast): 0x0000000000efedb0 ***
======= Backtrace: =========
/lib64/libc.so.6[0x338727230f]
/lib64/libc.so.6(cfree+0x4b)[0x338727276b]
nginx: worker process[0x41753f]
nginx: worker process[0x4175a9]
nginx: worker process[0x406e04]
nginx: worker process[0x42cb2a]
nginx: worker process[0x42cc0d]
nginx: worker process[0x42ec05]
nginx: worker process[0x42f043]
nginx: worker process[0x42b21d]
nginx: worker process[0x4269a3]
nginx: worker process[0x426ace]
nginx: worker process[0x42f57c]
nginx: worker process[0x42fd90]
nginx: worker process[0x430292]
nginx: worker process[0x42d94e]
nginx: worker process[0x41980e]
nginx: worker process[0x4196d0]
nginx: worker process[0x41eea0]
nginx: worker process[0x41d7e7]
nginx: worker process[0x41f689]
nginx: worker process[0x4062da]
/lib64/libc.so.6(__libc_start_main+0xf4)[0x338721d994]
nginx: worker process[0x404ad9]

2010/11/04 16:49:37 [alert] 17423#0: worker process 2315 exited on signal 6
2010/11/04 16:53:23 [alert] 14441#0: ignore long locked inactive cache entry b4599f772edd34815a86c4042662502c, count:1
2010/11/04 16:53:48 [alert] 14441#0: ignore long locked inactive cache entry 39a531d13533cbc8c5fb9887af19d8ed, count:1
2010/11/04 16:53:49 [alert] 14441#0: ignore long locked inactive cache entry 773ed85e18dad90a7a7bdde02018bb59, count:1
2010/11/04 16:53:50 [alert] 14441#0: ignore long locked inactive cache entry b255244ed026b89709fcd3bf43bb7ae4, count:1
2010/11/04 16:53:50 [alert] 14441#0: ignore long locked inactive cache entry bd1cc3babc95a3799cfdff7609cdd39c, count:1
2010/11/04 16:54:07 [alert] 14441#0: ignore long locked inactive cache entry d9a2c468a65727016e081d9a279b1814, count:1
2010/11/04 16:54:15 [alert] 14441#0: ignore long locked inactive cache entry bcfe91f4823d8f129ff448bc5248b2ec, count:1
2010/11/04 16:54:17 [alert] 14441#0: ignore long locked inactive cache entry f868e840b9330c3f63364760cd65a2ba, count:1
2010/11/04 16:54:33 [alert] 14441#0: ignore long locked inactive cache entry 857393a91f72db369d184e2e033d6e3f, count:1
2010/11/04 16:54:35 [alert] 14441#0: ignore long locked inactive cache entry 6a87a1670bfff5e6190a76705bcaaa6e, count:1[/color]

перезапуск ничего не изменил - опять посыпались строки вида

[color=#FF0000]2010/11/04 16:54:35 [alert] 14441#0: ignore long locked inactive cache entry 6a87a1670bfff5e6190a76705bcaaa6e, count:1[/color]

пришлось очистить вручную кеш

что произошло ?

пс: врубит отладку пока не могу - рабочий сервер

пс2: решил поверить - ввожу данный кривой запрос но ничего не происходит