On 2023-09-27 19:15, Alex Rousskov wrote: > On 2023-09-27 11:08, Dmitry Katsubo wrote: > >> After upgrading Squid from v4.13-10+deb11u2 (bullseye) to v5.7-2 >> (bookworm) I started to get about 5 core dumps per day like below, provided . >> How can I find out the root of the problem and eliminate it? > > > Your Squid is most likely suffering (among other v5 bugs) from Squid Bug > 5154: https://bugs.squid-cache.org/show_bug.cgi?id=5154 > > There is currently no fix for that bug (that I can recommend without serious caveats). There has been significant progress towards a fix, but it may have stalled at > https://github.com/squid-cache/squid/pull/1421 > > The best known way to prevent bug 5154 is to enable IPv6 support, but that is not feasible in many environments. > > Another Squid admin has reported success with an unofficial (and probably incomplete) workaround at https://lists.squid-cache.org/pipermail/squid-users/2023-September/026103.html Thanks for this information Alex, Debain sid has v6.1-2, which I believe is also affected, hence no reason to try it 🤔 After reading the bug#5154 description I see that the issue is because of disabled IPv6, in my case, via sysctl: net.ipv6.conf.default.disable_ipv6=1 net.ipv6.conf.all.disable_ipv6=1 I believe re-enabling IPV6 should help the issue? I have checked why I have disabled it ... and it turned out that was an advise to fix the following error message in /var/log/squid/cache.log: SendEcho ERROR: sending to ICMPv6 packet to [2606:4700:e0::ac40:6225]: (101) Network is unreachable 😱 Boomerang has returned. > >> >> # coredumpctl gdb -1 --no-pager >> PID: 357187 (squid) >> UID: 13 (proxy) >> GID: 13 (proxy) >> Signal: 6 (ABRT) >> Timestamp: Wed 2023-09-27 11:27:08 CEST (5h 16min ago) >> Command Line: $'(squid-1)' --kid squid-1 --foreground -sYC >> Executable: /usr/sbin/squid >> Control Group: /system.slice/squid.service >> Unit: squid.service >> Slice: system.slice >> Storage: /var/lib/systemd/coredump/core.squid.13.f7e894167d564f788825cae8827bd2df.357187.1695806828000000.zst (present) >> Size on Disk: 2.5M >> Message: Process 357187 (squid) of user 13 dumped core. >> >> Module libsystemd.so.0 from deb systemd-252.12-1~deb12u1.amd64 >> Stack trace of thread 357187: >> #0 0x00007f752b2a9d3c n/a (libc.so.6 + 0x8ad3c) >> #1 0x00007f752b25af32 raise (libc.so.6 + 0x3bf32) >> #2 0x00007f752b245472 abort (libc.so.6 + 0x26472) >> #3 0x00007f752b245395 n/a (libc.so.6 + 0x26395) >> #4 0x00007f752b253e32 __assert_fail (libc.so.6 + 0x34e32) >> #5 0x00005576cf7c0ee4 _ZNK2Ip7Address11getAddrInfoERP8addrinfoi (squid + 0x466ee4) >> #6 0x00005576cf7bc3c5 _Z11comm_openexiiRN2Ip7AddressEiPKc (squid + 0x4623c5) >> #7 0x00005576cf80fdfe _ZN4Comm10ConnOpener8createFdEv (squid + 0x4b5dfe) >> #8 0x00005576cf8109c1 _ZN4Comm10ConnOpener5startEv (squid + 0x4b69c1) >> #9 0x00005576cf7ab09c _ZN9JobDialerI8AsyncJobE4dialER9AsyncCall (squid + 0x45109c) >> #10 0x00005576cf7a779f _ZN14AsyncCallQueue8fireNextEv (squid + 0x44d79f) >> #11 0x00005576cf7a7b52 _ZN14AsyncCallQueue4fireEv (squid + 0x44db52) >> #12 0x00005576cf55f689 _ZN9EventLoop7runOnceEv (squid + 0x205689) >> #13 0x00005576cf55f778 _ZN9EventLoop3runEv (squid + 0x205778) >> #14 0x00005576cf665a50 _Z9SquidMainiPPc (squid + 0x30ba50) >> #15 0x00005576cf4fdae1 main (squid + 0x1a3ae1) >> #16 0x00007f752b2461ca n/a (libc.so.6 + 0x271ca) >> #17 0x00007f752b246285 __libc_start_main (libc.so.6 + 0x27285) >> #18 0x00005576cf505cc1 _start (squid + 0x1abcc1) >> ELF object binary architecture: AMD x86-64 >> >> GNU gdb (Debian 13.1-3) 13.1 >> Reading symbols from /usr/sbin/squid... >> (No debugging symbols found in /usr/sbin/squid) >> [New LWP 357187] >> [Thread debugging using libthread_db enabled] >> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". >> Core was generated by `(squid-1) --kid squid-1 --foreground -sYC'. >> Program terminated with signal SIGABRT, Aborted. >> (gdb) bt >> #0 0x00007f752b2a9d3c in ?? () from /lib/x86_64-linux-gnu/libc.so.6 >> #1 0x00007f752b25af32 in raise () from /lib/x86_64-linux-gnu/libc.so.6 >> #2 0x00007f752b245472 in abort () from /lib/x86_64-linux-gnu/libc.so.6 >> #3 0x00007f752b245395 in ?? () from /lib/x86_64-linux-gnu/libc.so.6 >> #4 0x00007f752b253e32 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6 >> #5 0x00005576cf7c0ee4 in Ip::Address::getAddrInfo (this=this@entry=0x5576d2407a98, dst=@0x7ffea5b87f90: 0x5576d2a8af00, force=force@entry=0) at ./src/ip/Address.cc:663 >> #6 0x00005576cf7bc3c5 in comm_openex (sock_type=sock_type@entry=1, proto=proto@entry=6, addr=..., flags=1, note=0x5576d2ab0cd0 "[2a03:2880:f273:c8:face:b00c:0:167]") at ./src/comm.cc:347 >> #7 0x00005576cf80fdfe in Comm::ConnOpener::createFd (this=this@entry=0x5576d2a86bc8) at ./src/comm/ConnOpener.cc:288 >> #8 0x00005576cf8109c1 in Comm::ConnOpener::start (this=0x5576d2a86bc8) at ./src/comm/ConnOpener.cc:261 >> #9 0x00005576cf7ab09c in JobDialer<AsyncJob>::dial (this=0x5576d1e16558, call=...) at ../../src/base/AsyncJobCalls.h:175 >> #10 0x00005576cf7a779f in AsyncCallQueue::fireNext (this=this@entry=0x5576d1abbae0) at ./src/base/AsyncCallQueue.cc:60 >> #11 0x00005576cf7a7b52 in AsyncCallQueue::fire (this=0x5576d1abbae0) at ./src/base/AsyncCallQueue.cc:43 >> #12 0x00005576cf55f689 in EventLoop::dispatchCalls (this=0x7ffea5b885a0) at ./src/EventLoop.cc:144 >> #13 EventLoop::runOnce (this=this@entry=0x7ffea5b885a0) at ./src/EventLoop.cc:121 >> #14 0x00005576cf55f778 in EventLoop::run (this=this@entry=0x7ffea5b885a0) at ./src/EventLoop.cc:83 >> #15 0x00005576cf665a50 in SquidMain (argc=argc@entry=5, argv=argv@entry=0x7ffea5b88888) at ./src/main.cc:1719 >> #16 0x00005576cf4fdae1 in SquidMainSafe (argv=0x7ffea5b88888, argc=5) at ./src/main.cc:1406 >> #17 main (argc=5, argv=0x7ffea5b88888) at ./src/main.cc:1394 >> _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx https://lists.squid-cache.org/listinfo/squid-users
