[syslog-ng] ERROR:lib/dnscache.c:112:dns_cache_key_hash: code should not be reached

Wed Sep 21 13:48:20 CEST 2016

Try this one. It should output some more information:

https://github.com/bkil-syslogng/syslog-ng/tree/f/disabled-ipv6

On Wed, Sep 21, 2016 at 12:50 PM, Claus Albøge <ca at tdchosting.dk> wrote:

> Hi,
>
> I have noticed that syslog-ng exits from time to time, with the following
> error:
>
>   ERROR:lib/dnscache.c:112:dns_cache_key_hash: code should not be reached
>
> Trying to run syslog-ng from gdb show the following:
>
> # gdb --args /usr/sbin/syslog-ng -F -p /var/run/syslogd.pid
> GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-80.el7
> Copyright (C) 2013 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/sbin/syslog-ng...Reading symbols from
> /usr/lib/debug/usr/sbin/syslog-ng.debug...done.
> done.
>  (gdb) run
> Starting program: /usr/sbin/syslog-ng -F -p /var/run/syslogd.pid
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
> [New Thread 0x7ffff1e8a700 (LWP 18743)]
> [New Thread 0x7ffff1689700 (LWP 18748)]
> [New Thread 0x7ffff0e88700 (LWP 18893)]
> [New Thread 0x7fffe3fff700 (LWP 18956)]
> [New Thread 0x7fffe37fe700 (LWP 18959)]
> [New Thread 0x7fffe2ffd700 (LWP 18960)]
> [New Thread 0x7fffe27fc700 (LWP 18961)]
> [New Thread 0x7fffe1ffb700 (LWP 18962)]
> [Thread 0x7ffff1689700 (LWP 18748) exited]
> [Thread 0x7fffe27fc700 (LWP 18961) exited]
> [Thread 0x7fffe3fff700 (LWP 18956) exited]
> [New Thread 0x7fffe3fff700 (LWP 19114)]
> [New Thread 0x7fffe27fc700 (LWP 19136)]
> [New Thread 0x7ffff1689700 (LWP 19137)]
> [Thread 0x7fffe27fc700 (LWP 19136) exited]
> [Thread 0x7ffff1e8a700 (LWP 18743) exited]
> [New Thread 0x7ffff1e8a700 (LWP 19338)]
> [New Thread 0x7fffe27fc700 (LWP 19339)]
> [Thread 0x7fffe27fc700 (LWP 19339) exited]
> [Thread 0x7ffff1e8a700 (LWP 19338) exited]
> [New Thread 0x7ffff1e8a700 (LWP 19566)]
> [New Thread 0x7fffe27fc700 (LWP 19567)]
> [Thread 0x7ffff1e8a700 (LWP 19566) exited]
> [Thread 0x7fffe37fe700 (LWP 18959) exited]
> [New Thread 0x7ffff1e8a700 (LWP 19731)]
> [New Thread 0x7fffe37fe700 (LWP 19732)]
> [Thread 0x7fffe27fc700 (LWP 19567) exited]
> [Thread 0x7fffe1ffb700 (LWP 18962) exited]
> [New Thread 0x7fffe1ffb700 (LWP 19984)]
> [New Thread 0x7fffe27fc700 (LWP 19985)]
> **
> ERROR:lib/dnscache.c:112:dns_cache_key_hash: code should not be reached
>
> Program received signal SIGABRT, Aborted.
> [Switching to Thread 0x7ffff1689700 (LWP 19137)]
> 0x00007ffff5fb05f7 in raise () from /lib64/libc.so.6
> Missing separate debuginfos, use: debuginfo-install
> bzip2-libs-1.0.6-13.el7.x86_64 elfutils-libelf-0.163-3.el7.x86_64
> elfutils-libs-0.163-3.el7.x86_64 eventlog-0.2.13-4.el7.x86_64
> glib2-2.42.2-5.el7.x86_64 glibc-2.17-106.el7_2.8.x86_64
> ivykis-0.36.2-2.el7.x86_64 json-c-0.11-4.el7_0.x86_64
> keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.13.2-12.el7_2.x86_64
> libattr-2.4.46-12.el7.x86_64 libcap-2.22-8.el7.x86_64
> libcom_err-1.42.9-7.el7.x86_64 libgcc-4.8.5-4.el7.x86_64
> libgcrypt-1.5.3-12.el7_1.1.x86_64 libgpg-error-1.12-3.el7.x86_64
> libnet-1.1.6-7.el7.x86_64 libselinux-2.2.2-6.el7.x86_64
> libuuid-2.23.2-26.el7_2.3.x86_64 openssl-libs-1.0.1e-51.el7_2.5.x86_64
> pcre-8.32-15.el7_2.1.x86_64 systemd-libs-219-19.el7_2.13.x86_64
> tcp_wrappers-libs-7.6-77.el7.x86_64 xz-libs-5.1.2-12alpha.el7.x86_64
> zlib-1.2.7-15.el7.x86_64
> (gdb)
> (gdb) bt
> #0  0x00007ffff5fb05f7 in raise () from /lib64/libc.so.6
> #1  0x00007ffff5fb1ce8 in abort () from /lib64/libc.so.6
> #2  0x00007ffff70426d5 in g_assertion_message () from
> /lib64/libglib-2.0.so.0
> #3  0x00007ffff704276a in g_assertion_message_expr () from
> /lib64/libglib-2.0.so.0
> #4  0x00007ffff7b62cc4 in dns_cache_key_hash (e=<optimized out>) at
> lib/dnscache.c:112
> #5  0x00007ffff700c4fc in g_hash_table_remove_internal () from
> /lib64/libglib-2.0.so.0
> #6  0x00007ffff7b67584 in resolve_sockaddr_to_inet_or_inet6_hostname
> (host_resolve_options=0x651754, saddr=0x7fffec3840d0,
> result_len=0x7ffff1686370) at lib/host-resolve.c:332
> #7  resolve_sockaddr_to_hostname (result_len=result_len at entry=0x7ffff1686370,
> saddr=0x7fffec3840d0, host_resolve_options=0x651754) at
> lib/host-resolve.c:343
> #8  0x00007ffff7b6c03a in log_source_mangle_hostname (self=self at entry=0x1cdf400,
> msg=msg at entry=0x7fffe4ec6da0) at lib/logsource.c:156
> #9  0x00007ffff7b6c280 in log_source_queue (s=0x1cdf400,
> msg=0x7fffe4ec6da0, path_options=0x7ffff1686550, user_data=<optimized out>)
> at lib/logsource.c:266
> #10 0x00007ffff7b6ca0a in log_pipe_queue (path_options=<optimized out>,
> msg=<optimized out>, s=<optimized out>) at lib/logpipe.h:339
> #11 log_pipe_forward_msg (self=<optimized out>, path_options=<optimized
> out>, msg=<optimized out>) at lib/logpipe.h:302
> #12 log_pipe_queue (path_options=<optimized out>, msg=<optimized out>,
> s=<optimized out>) at lib/logpipe.h:343
> #13 log_pipe_forward_msg (self=<optimized out>, path_options=<optimized
> out>, msg=<optimized out>) at lib/logpipe.h:302
> #14 log_pipe_queue (path_options=<optimized out>, msg=0x7fffe4ec6da0,
> s=0x7fffe4ec6da0) at lib/logpipe.h:343
> #15 log_source_post (self=self at entry=0x1cdf400, msg=msg at entry=0x7fffe4ec6da0)
> at lib/logsource.c:249
> #16 0x00007ffff7b6b179 in log_reader_handle_line (aux=0x7ffff1686600,
> length=<optimized out>, line=<optimized out>, self=0x1cdf400) at
> lib/logreader.c:320
> #17 log_reader_fetch_log (self=self at entry=0x1cdf400) at
> lib/logreader.c:381
> #18 0x00007ffff7b6b299 in log_reader_work_perform (s=0x1cdf400) at
> lib/logreader.c:88
> #19 0x00007ffff7b7307d in _work (self=<optimized out>) at
> lib/mainloop-io-worker.c:52
> #20 0x00007ffff655dc67 in iv_work_thread_do_work () from
> /lib64/libivykis.so.0
> #21 0x00007ffff655cfc3 in iv_run_tasks () from /lib64/libivykis.so.0
> #22 0x00007ffff655f7dc in iv_main () from /lib64/libivykis.so.0
> #23 0x00007ffff655dab4 in iv_work_thread () from /lib64/libivykis.so.0
> #24 0x00007ffff6560270 in iv_thread_handler () from /lib64/libivykis.so.0
> #25 0x00007ffff6344dc5 in start_thread () from /lib64/libpthread.so.0
> #26 0x00007ffff6071ced in clone () from /lib64/libc.so.6
>
> # grep dns /etc/syslog-ng/syslog-ng.conf
>     use_dns (no);
>
> Not sure what its trying to resolve.
>
> # syslog-ng -V
> syslog-ng 3.8.1
> Installer-Version: 3.8.1
> Revision:
> Module-Directory: //usr/lib64/syslog-ng
> Module-Path: //usr/lib64/syslog-ng
> Available-Modules: disk-buffer,sdjournal,afstomp,json-plugin,cryptofuncs,
> graphite,cef,kvformat,add-contextual-data,dbparser,pseudofile,csvparser,
> syslogformat,confgen,afsocket,afuser,date,linux-kmsg-format,
> system-source,basicfuncs,afamqp,affile,afprog
> Enable-Debug: off
> Enable-GProf: off
> Enable-Memtrace: off
> Enable-IPv6: on
> Enable-Spoof-Source: on
> Enable-TCP-Wrapper: on
> Enable-Linux-Caps: off
>
> Please let me know, if more info is needed.
>
>
> /Claus A
>
> ____________________________________________________________
> __________________
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> Documentation: http://www.balabit.com/support/documentation/?
> product=syslog-ng
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>
>
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