Re: cfservd segmentation faults

[Mark . Burgess]

This looks like the usual bug in the resolver libraries.
Somewhere in nsswitch.conf or equivalent, you might have
something that says you looks up hostnames in NIS or files
before dns. This tends to cause this problem. 

You can also try 2.1.0b3 which might solve the problem in
a different way...

M

On 27 Sep, Jeremy Dreese wrote:
> 
> I wasn't sure whether to post this here or the bug list but here it is...
> 
> I recently upgraded from version 2.0.4 to 2.0.8p1 and I've been receiving
> segmentation faults from cfservd on my cfengine server.  Debugging mode
> (--debug) didn't seem to provide helpful info because it seemed to seg fault 
> at
> different places each time (probably just different amounts of output buffered
> before the seg fault?).  So I recompiled with debugging on (-g to compiler) 
> and
> had cfservd crash twice with similar info.  I don't know much about using gdb,
> but from a previous post I saw that it was suggested to run "gdb -c core
> /path/to/cfservd" and then type "backtrace".  Here's what I received:
> 
> Core was generated by `/var/cfengine/bin/cfservd --debug'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x40095bc2 in ?? ()
> (gdb) backtrace
> #0  0x40095bc2 in ?? ()
> #1  0x4008c561 in ?? ()
> #2  0x4008c61e in ?? ()
> #3  0x40093ee5 in ?? ()
> #4  0x4001e323 in ?? ()
> #5  0x4001ecd0 in ?? ()
> #6  0x08170020 in gethostbyname2_r ()
> #7  0x0816a5c0 in gaih_inet ()
> #8  0x0816aba2 in getaddrinfo ()
> #9  0x0804bec2 in VerifyConnection (conn=0x40259700, 
>     buf=0xbadfea62 "134.82.133.1 alcor.eg.bucknell.edu root 0")
>     at cfservd.c:1792
> #10 0x0804a581 in BusyWithConnection (conn=0x40259700) at cfservd.c:1212
> #11 0x0804a1c3 in HandleConnection (conn=0x40259700) at cfservd.c:1112
> #12 0x08136b2b in pthread_start_thread ()
> 
> I'm wondering if any of this is load related.  I have around 100-110 hosts
> connecting to one server with a splay time of 30 minutes.
> 
> Let me know if there's anything else I can provide.  Thanks in advance for 
> the help!
> 
> 
> 
> _______________________________________________
> Help-cfengine mailing list
> Help-cfengine@gnu.org
> http://mail.gnu.org/mailman/listinfo/help-cfengine



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