Hello, I need help about squid-3.5.19 crash(Segment Violation) I posted question at 2016 March(attached last sentence) And at last month, I upgrade squid 3.5.1 to 3.5.19, then solved this issue(Thank you!) But other problem occured. When I change squid.conf and reconfigure squid, sometimes squid crashed(Problem occured 3 times between 2016/6/6 to 2016/6/9) Can we prevent crash of squid by thise problem? Dying-message is below, ---- 2016/06/07 13:09:23 kid1| Reconfiguring Squid Cache (version 3.5.19)... 2016/06/07 13:09:23 kid1| Closing HTTP port 0.0.0.0:8080 2016/06/07 13:09:23 kid1| Logfile: closing log daemon:/var/log/squid.dir/access.log 2016/06/07 13:09:23 kid1| Logfile Daemon: closing log daemon:/var/log/squid.dir/access.log 2016/06/07 13:09:23 kid1| Startup: Initializing Authentication Schemes ... 2016/06/07 13:09:23 kid1| Startup: Initialized Authentication Scheme 'basic' 2016/06/07 13:09:23 kid1| Startup: Initialized Authentication Scheme 'digest' 2016/06/07 13:09:23 kid1| Startup: Initialized Authentication Scheme 'negotiate' 2016/06/07 13:09:23 kid1| Startup: Initialized Authentication Scheme 'ntlm' 2016/06/07 13:09:23 kid1| Startup: Initialized Authentication. 2016/06/07 13:09:23 kid1| Processing Configuration File: /usr/local/squid-3.5.19-errorpage-follow-x-forwarded-for/etc/squid.conf (depth 0) 2016/06/07 13:09:23 kid1| WARNING: HTTP requires the use of Via 2016/06/07 13:09:23 kid1| Logfile: opening log daemon:/var/log/squid.dir/access.log 2016/06/07 13:09:23 kid1| Logfile Daemon: opening log /var/log/squid.dir/access.log 2016/06/07 13:09:23 kid1| Squid plugin modules loaded: 0 2016/06/07 13:09:23 kid1| Adaptation support is off. 2016/06/07 13:09:23 kid1| Store logging disabled 2016/06/07 13:09:23 kid1| DNS Socket created at 0.0.0.0, FD 12 2016/06/07 13:09:23 kid1| Adding domain (sorry, masked) from /etc/resolv.conf 2016/06/07 13:09:23 kid1| Adding nameserver (sorry, masked) from /etc/resolv.conf 2016/06/07 13:09:23 kid1| Adding nameserver (sorry, masked) from /etc/resolv.conf 2016/06/07 13:09:23 kid1| helperOpenServers: Starting 100/400 'negotiate_wrapper_auth' processes 2016/06/07 13:09:24 kid1| helperOpenServers: Starting 100/400 'ntlm_auth' processes 2016/06/07 13:09:25 kid1| helperOpenServers: Starting 15/100 'ext_ldap_group_acl' processes 2016/06/07 13:09:25 kid1| helperOpenServers: Starting 15/100 'ext_ldap_group_acl' processes 2016/06/07 13:09:25 kid1| HTCP Disabled. 2016/06/07 13:09:25 kid1| Configuring Parent (sorry, masked)/8080/7 2016/06/07 13:09:25 kid1| Configuring Parent (sorry, masked)/8080/7 2016/06/07 13:09:25 kid1| Configuring Parent (sorry, masked)/8080/7 2016/06/07 13:09:25 kid1| Configuring Parent (sorry, masked)/8080/7 2016/06/07 13:09:25 kid1| Configuring Parent (sorry, masked)/8080/7 2016/06/07 13:09:25 kid1| Configuring Parent (sorry, masked)/8080/7 2016/06/07 13:09:25 kid1| Finished loading MIME types and icons. 2016/06/07 13:09:25 kid1| Accepting HTTP Socket connections at local=0.0.0.0:8080 remote=[::] FD 1398 flags=9 FATAL: Received Segment Violation...dying. 2016/06/07 13:09:25 kid1| Closing HTTP port 0.0.0.0:8080 2016/06/07 13:09:25 kid1| storeDirWriteCleanLogs: Starting... 2016/06/07 13:09:25 kid1| Finished. Wrote 0 entries. 2016/06/07 13:09:25 kid1| Took 0.00 seconds ( 0.00 entries/sec). CPU Usage: 9659.361 seconds = 2433.226 user + 7226.134 sys Maximum Resident Size: 528736 KB Page faults with physical i/o: 0 ---- I confirmed coredump by gdb command. ---- # pwd /var/spool/abrt/ccpp-2016-06-07-13:09:25-11730 # ls -l total 104720 -rw-r----- 1 abrt squid 5 Jun 7 13:09 abrt_version -rw-r----- 1 abrt squid 4 Jun 7 13:09 analyzer -rw-r----- 1 abrt squid 6 Jun 7 13:09 architecture -rw-r----- 1 abrt squid 0 Jun 7 13:09 cgroup -rw-r----- 1 abrt squid 9 Jun 7 13:09 cmdline -rw-r----- 1 abrt squid 143380480 Jun 7 13:09 coredump -rw-r----- 1 abrt squid 1 Jun 7 13:11 count -rw-r----- 1 abrt squid 1681 Jun 7 13:11 dso_list -rw-r----- 1 abrt squid 183 Jun 7 13:09 environ -rw-r----- 1 abrt squid 67 Jun 7 13:09 executable -rw-r----- 1 abrt squid 15 Jun 7 13:09 hostname -rw-r----- 1 abrt squid 26 Jun 7 13:09 kernel -rw-r----- 1 abrt squid 10 Jun 7 13:09 last_occurrence -rw-r----- 1 abrt squid 1323 Jun 7 13:09 limits -rw-r----- 1 abrt squid 8865 Jun 7 13:09 maps -rw-r----- 1 abrt squid 416 Jun 7 13:09 open_fds -rw-r----- 1 abrt squid 54 Jun 7 13:09 os_release -rw-r----- 1 abrt squid 5 Jun 7 13:09 pid -rw-r----- 1 abrt squid 56 Jun 7 13:09 pwd -rw-r----- 1 abrt squid 108 Jun 7 13:09 reason -rw-r----- 1 abrt squid 2352400 Jun 7 13:11 sosreport.tar.xz -rw-r----- 1 abrt squid 10 Jun 7 13:09 time -rw-r----- 1 abrt squid 5 Jun 7 13:09 uid -rw-r----- 1 abrt squid 6 Jun 7 13:09 username -rw-r----- 1 abrt squid 40 Jun 7 13:11 uuid # gdb /usr/local/squid-3.5.19-errorpage-follow-x-forwarded-for/sbin/squid coredump GNU gdb (GDB) Red Hat Enterprise Linux (7.2-75.el6) Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/local/squid-3.5.19-errorpage-follow-x-forwarded-for/sbin/squid...done. [New Thread 11730] Missing separate debuginfo for Try: yum --enablerepo='*-debug*' install /usr/lib/debug/.build-id/b7/4f8095168b93495573fcca21245eb3900f05ea Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done. [Thread debugging using libthread_db enabled] Loaded symbols for /lib64/libpthread.so.0 Reading symbols from /lib64/libcrypt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libcrypt.so.1 Reading symbols from /lib64/libgssapi_krb5.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libgssapi_krb5.so.2 Reading symbols from /lib64/libkrb5.so.3...(no debugging symbols found)...done. Loaded symbols for /lib64/libkrb5.so.3 Reading symbols from /lib64/libk5crypto.so.3...(no debugging symbols found)...done. Loaded symbols for /lib64/libk5crypto.so.3 Reading symbols from /lib64/libcom_err.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libcom_err.so.2 Reading symbols from /lib64/libnsl.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libnsl.so.1 Reading symbols from /lib64/libresolv.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libresolv.so.2 Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/librt.so.1 Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libdl.so.2 Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libstdc++.so.6 Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libm.so.6 Reading symbols from /lib64/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libgcc_s.so.1 Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libc.so.6 Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 Reading symbols from /lib64/libfreebl3.so...(no debugging symbols found)...done. Loaded symbols for /lib64/libfreebl3.so Reading symbols from /lib64/libkrb5support.so.0...(no debugging symbols found)...done. Loaded symbols for /lib64/libkrb5support.so.0 Reading symbols from /lib64/libkeyutils.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libkeyutils.so.1 Reading symbols from /lib64/libselinux.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libselinux.so.1 Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libnss_files.so.2 Core was generated by `(squid-1)'. Program terminated with signal 6, Aborted. #0 0x000000353e432625 in raise () from /lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.149.el6_6.7.x86_64 keyutils-libs-1.4-5.el6.x86_64 krb5-libs-1.10.3-37.el6_6.x86_64 libcom_err-1.41.12-21.el6.x86_64 libgcc-4.4.7-11.el6.x86_64 libselinux-2.0.94-5.8.el6.x86_64 libstdc++-4.4.7-11.el6.x86_64 nss-softokn-freebl-3.14.3-22.el6_6.x86_64 (gdb) bt full #0 0x000000353e432625 in raise () from /lib64/libc.so.6 No symbol table info available. #1 0x000000353e433e05 in abort () from /lib64/libc.so.6 No symbol table info available. #2 0x00000000006676cf in death (sig=<value optimized out>) at tools.cc:356 No locals. #3 <signal handler called> No symbol table info available. #4 0x000000000066fcac in TunnelStateData::handleConnectResponse ( this=0x7d7f7c8, chunkSize=<value optimized out>) at tunnel.cc:478 rep = {<HttpMsg> = {<Lock> = {_vptr.Lock = 0x853aa8, count_ = 0}, _vptr.HttpMsg = 0x853a38, http_ver = {<AnyP::ProtocolVersion> = { protocol = AnyP::PROTO_HTTP, major = 1, minor = 0}, <No data fields>}, header = { entries = std::vector of length 0, capacity 0, mask = '\000' <repeats 11 times>, owner = hoReply, len = 0, conflictingContentLength_ = false}, cache_control = 0x0, hdr_sz = 39, content_length = -1, pstate = psParsed, body_pipe = { p_ = 0x0}}, date = -1, last_modified = -1, expires = -1, content_type = {static npos = 18446744073709551615, size_ = 0, len_ = 0, static SizeMax_ = 18446744073709551615, buf_ = 0x0}, surrogate_control = 0x0, content_range = 0x0, keep_alive = 0, sline = {protocol = AnyP::PROTO_HTTP, version = {<AnyP::ProtocolVersion> = {protocol = AnyP::PROTO_HTTP, major = 1, minor = 0}, <No data fields>}, status_ = Http::scOkay, reason_ = 0x0}, body = {mb = 0x48d2688}, protoPrefix = {static npos = 18446744073709551615, size_ = 40, len_ = 5, static SizeMax_ = 18446744073709551615, buf_ = 0x37e3720 "HTTP/"}, do_clean = true, bodySizeMax = -2} parseErr = Http::scNone pwd = <value optimized out> relay = <value optimized out> eof = false parsed = <value optimized out> #5 0x00000000006702cb in TunnelStateData::readConnectResponseDone ( this=0x7d7f7c8, buf=<value optimized out>, len=39, errcode=Comm::OK, xerrno=0) at tunnel.cc:389 __FUNCTION__ = "readConnectResponseDone" #6 0x00000000006f6598 in AsyncCall::make (this=0x6c53d10) at AsyncCall.cc:40 __FUNCTION__ = "make" #7 0x00000000006f9c2e in AsyncCallQueue::fireNext (this=<value optimized out>) at AsyncCallQueue.cc:56 call = {p_ = 0x6c53d10} __FUNCTION__ = "fireNext" #8 0x00000000006f9fa0 in AsyncCallQueue::fire (this=0x2ab69f0) at AsyncCallQueue.cc:42 made = true #9 0x00000000005853fc in EventLoop::runOnce (this=0x7fffa0626350) at EventLoop.cc:120 sawActivity = <value optimized out> waitingEngine = 0x7fffa0626400 __FUNCTION__ = "runOnce" #10 0x00000000005855a0 in EventLoop::run (this=0x7fffa0626350) at EventLoop.cc:82 No locals. #11 0x00000000005ef5cd in SquidMain (argc=<value optimized out>, argv=<value optimized out>) at main.cc:1539 WIN32_init_err = 0 __FUNCTION__ = "SquidMain" signalEngine = {<AsyncEngine> = { _vptr.AsyncEngine = 0x856a90}, <No data fields>} store_engine = {<AsyncEngine> = { _vptr.AsyncEngine = 0x856af0}, <No data fields>} comm_engine = {<AsyncEngine> = { _vptr.AsyncEngine = 0xb251f0}, <No data fields>} mainLoop = {errcount = 0, static Running = 0x7fffa0626350, last_loop = false, engines = std::vector of length 4, capacity 4 = { 0x7fffa0626420, 0xb50150, 0x7fffa0626410, 0x7fffa0626400}, timeService = 0x7fffa06263f0, primaryEngine = 0x7fffa0626400, loop_delay = 0, error = false, runOnceResult = false} time_engine = {_vptr.TimeEngine = 0x865eb0} #12 0x00000000005f02a8 in SquidMainSafe (argc=<value optimized out>, argv=<value optimized out>) at main.cc:1263 No locals. #13 main (argc=<value optimized out>, argv=<value optimized out>) at main.cc:1256 No locals. (gdb) quit ---- Our environment is below, - squid-3.5.19 with squid_kerb_auth x10 server (currently, three server crashed by this problem) - using BIG-IP LTM load balancer - enable "follow_x_fowarded_for" option - User ID number is about 6600 - IP address number is about 7600 - Most user authentication is ActiveDirectory(Kerberos), NTLM is only a little - Normaly, CPU load is about 20% Regards, Kazuhiro From: asakura@xxxxxxxxxxxxx Subject: Re: access from same ID and different IP addresses. Date: Thu, 17 Mar 2016 21:50:43 +0900 (JST) > Thank you Amos, > > I will consider squid version up of squid. > > By the way, the UserID and IP segment of problem is not currently used. > They are scheduled to be used again in May 2016. > > It will report if there is any good news. > > > Regards, > Kazuhiro > > > From: Amos Jeffries <squid3@xxxxxxxxxxxxx> > Subject: Re: access from same ID and different IP addresses. > Date: Thu, 17 Mar 2016 01:35:07 +1300 > > > On 16/03/2016 5:06 p.m., asakura@xxxxxxxxxxxxx wrote: > > > Hello, > > > > > > Recently, in our environment, CPU load on the squid proxy server > > > is happening trouble to become a 100%. > > > > > > example---- > > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > > 29767 squid 20 0 1430m 1.3g 5332 R 99.1 17.4 6836:56 squid > > > 16856 squid 20 0 29764 3280 1620 S 2.0 0.0 68:46.34 squid_kerb_auth > > > 16860 squid 20 0 29760 3272 1616 S 1.7 0.0 43:53.67 squid_kerb_auth > > > 16855 squid 20 0 22636 1244 1000 S 0.3 0.0 2:57.66 negotiate_wrapp > > > 21437 asakura 20 0 15432 1632 932 R 0.3 0.0 0:01.02 top > > > 26167 root 20 0 19088 2248 1060 S 0.3 0.0 1016:14 syslog-ng > > > --- > > > > > > As a result of investigation, We suspect that CPU load become a 100% > > > when user attempts to log in from more than different ip addresses. > > > > > > > All that CPU has to be spent doing something. So what is that something? > > > > > > > This time, squid has been accessed from 20 or more units of > > > the PC with the same user ID. > > > When we disable user authentication from target segment, CPU load be low. > > > > > > We want to know whether CPU load goes up when squid is accessed from > > > a large number of different IP addresses with the same user ID. > > > > > > Our environment is below, > > > - squid-3.5.1 with squid_kerb_auth(sorry old version...) x5 server > > > > First step is upgrading. So you can see if it is one of the thousand or > > so bugs already fixed since that old version. > > > > There have been at least 2 bugs whose claimed symptom was "100% CPU > > usage" that got fixed this past year. > > > > > > Amos _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users
