I'm also facing this issue on x86. At some point squid crashes and dumps the same error here's how I've configured squid: SQUID_CONF_OPT = --sysconfdir=/etc/squid \ --localstatedir=/var \ --datadir=/usr/share/squid \ --enable-linux-netfilter \ --enable-removal-policies="lru,heap" \ --with-filedescriptors=65535 \ --disable-ident-lookups \ --with-krb5-config=no \ --enable-auth-basic="fake getpwnam" \ --enable-auth-digest="file" \ --enable-auth-negotiate="wrapper" \ --enable-auth-ntlm="fake" \ --enable-basic-auth-helpers="NCSA" \ --disable-strict-error-checking \ --enable-storeio="aufs" \ --enable-disk-io="DiskThreads" \ --enable-arp-acl \ --enable-delay-pools \ --enable-kill-parent-hack \ --enable-http-violations \ --enable-follow-x-forwarded-for \ --enable-zph-qos \ --with-netfilter-conntrack \ --enable-external-acl-helpers="file_userip" I'm really out of ideas, never faced an issue like this ---------- Forwarded message ---------- From: Cassiano Martin <cassiano@xxxxxxxxxxxxx> Date: 2014-03-20 12:02 GMT-03:00 Subject: Segfault in CommSelectEngine::checkEvents To: squid-users@xxxxxxxxxxxxxxx Guys, I'm facing a very strange issue. I have compiled squid, from version 3.3.3 to 3.4.4 and ALL of them crashes on the same place. The architecture is mips64. I've attached a backtrace Program received signal SIGSEGV, Segmentation fault. 0x104771ec in CommSelectEngine::checkEvents (this=0x7fff6910, timeout=24) at comm.cc:2058 2058 comm.cc: No such file or directory. (gdb) (gdb) (gdb) (gdb) (gdb) bt #0 0x104771ec in CommSelectEngine::checkEvents (this=0x7fff6910, timeout=24) at comm.cc:2058 #1 0x10229a90 in EventLoop::checkEngine (this=0x7fff6920, engine=0x7fff6910, primary=true) at EventLoop.cc:55 #2 0x1022a004 in EventLoop::runOnce (this=0x7fff6920) at EventLoop.cc:129 #3 0x10229d9c in EventLoop::run (this=0x7fff6920) at EventLoop.cc:99 #4 0x102fa25c in SquidMain (argc=2, argv=0x7fff6af4) at main.cc:1534 #5 0x102f91c0 in SquidMainSafe (argc=2, argv=0x7fff6af4) at main.cc:1262 #6 0x102f9170 in main (argc=2, argv=0x7fff6af4) at main.cc:1254 It happens when I open some connections, and close the web browser. I have no Idea what I can do to solve this. Squid is in transparent mode. Thanks