Re: [SQU] squid 2.3STABLE4 crash

--disable-internal-dns will most likely work around the issue.

What happens here is that the internal DNS client receives a odd DNS
reply it is not prepared to handle (from what it looks in the code an IP
v4 address with a size other than 4 octets).

It would be nice of you could spend some time on digging some
information out of this crash.

A good start is to make sure there will be a coredump, and that the core
is from the exact point where it crashes.

As the userid configured as cache_effective_user in squid.conf, start
squid with the -C option.

Then when it crashes, we should get a core file in the first cache_dir
directory.

Start gdb on that core

gdb squid /path/to/core

and type the following commands to gdb:

   backtrace
   print k
   print j
   print answers[k]

This will give some additional insight in what is going on here, but the
problem should be possible to fix even if you cannot get this
information.

--
Henrik Nordstrom
Squid hacker
Brian R. Landy wrote:
> 
> Hi,
>    For the past couple of weeks I've been experiencing a crash with Squid
> 2.3.  I'm using RedHat 6.2 with their precompiled 2.2.16 kernel (but saw
> the problem as well on an older system running RedHat 6.1 with a custom
> 2.2.14 kernel).  Only some URL's are proxied through Squid
> (primarily microsoft.com, dell.com, and yahoo.com).  All my clients access
> a different proxy (Netscape 3.52), but it routes requests for those few
> URLs through Squid, the rest it gets directly.  I saw the crash as well
> on 2.3STABLE1.
> 
> Anyway, the problem is that squid will run fine for roughly 1 day.  Then
> over the course of an hour, it begins to crash and restart itself.  It
> generates this error message:
> 
> assertion failed: ipcache.c:382: "answers[k].rdlength == 4"
> 
> After around an hour, squid gives up restarting itself.  I've searched the
> mailing list and Bugzilla but didn't turn up the particular assertion I'm
> getting.
> 
> Oh, I just remembered, yesterday I tried the latest 2.3 snapshot
> (200010310000), and it has the same problem.  The only configure option I
> used was --disable-ident-lookups.  Any ideas?  Thanks!
> 
> Brian Landy
> landy@alumni.caltech.edu
> 
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