squid FATAL: Received Segment Violation...dying.

a616652325

晚上正想睡觉，突然接到报警，前两天新搭的squid服务器squid意外停止，真是奇怪啊，上去一看，squid发生意外错误，汗，崩溃了，赶紧调整解析。解析调整完毕后，查找原因，在此记录错误处理经过吧。
   less cache.log
   大概隔半个小时就抛一个错误：squid FATAL: Received Segment Violation...dying.然后squid就尝试重新启动，从早上一直有，郁闷啊，看了后就开始上网查找资料，终于找到一段：

参考：
The following words are excerpted from Squit FAQ:


Some versions of GCC (notably 2.95.1 through 2.95.3) have bugs with compiler optimization. These GCC bugs may cause NULL pointer accesses in Squid, resulting in a ``FATAL: Received Segment Violation...dying'' message and a core dump.

You can work around these GCC bugs by disabling compiler optimization. The best way to do that is start with a clean source tree and set the CC options specifically:

% cd squid-x.y
% make distclean
% setenv CFLAGS='-g -Wall'
% ./configure ...

To check that you did it right, you can search for AC_CFLAGS in src/Makefile:

% grep AC_CFLAGS src/Makefile
AC_CFLAGS = -g -Wall

Now when you recompile, GCC won't try to optimize anything:
% make
Making all in lib...
gcc -g -Wall -I../include -I../include -c rfc1123.c
...etc...

NOTE: some people worry that disabling compiler optimization will negatively impact Squid's performance. The impact should be negligible, unless your cache is really busy and already runs at a high CPU usage. For most people, the compiler optimization makes little or no difference at all.
   说实话，这段英文还比较简单，咱就用谷歌翻译了下，原来gcc编译器优化的一个bug导致的，晕死啊，这个破系统是让idc帮忙装的，这系统真要命呢。开始按照上面的操作步骤重新编译:
#/usr/local/squid/sbin/squid -k shutdown
#mv /usr/locla/squid /usr/local/squid-bak
#tar xvzf squid-2.7.STABLE9.tar.gz
#cd squid-2.7.STABLE9
#export CFLAGS='-g -Wall'
#source /etc/profile
重新编译：
#./configure --prefix=/usr/local/squid --enable-removal-policies=heap,lru  --enable-linux-netfilter --enable-storeio=ufs,aufs,diskd,null  --enable-epoll --enable-ident-lookups --enable-carp --enable-delay-pools  --disable-wccp --disable-wccpv2 --enable-snmp  --enable-cachemgr-hostname=squid --enable-cache-digests --with-pthreads  --enable-gnuregex --with-aio --enable-large-cache-files  --with-maxfd=344800 --enable-async-io=160 --enable-internal-dns  --enable-linux-netfilter --enable-kill-parent-hack  --enable-default-err-language="Simplify_Chinese"
#cd src
#vim Makefile 发现现在的CFLAGS为：
CFLAGS = -G -Wall -D_REENTRANT
而未禁用编译器优化前的为：
CFLAGS = -Wall -g -O2 -D_REENTRANT
看来还是有了一定的变化。
#cd ..
#make
#make install
好了，重新部署配置文件，启动squid,调整解析，再次查看日志，暂时倒是没抛上面的错误，继续观察吧。
       记录2天日志看看，如果还有这个错误，这事可就玩大了。。祈祷吧。