Re: assertion failed: ipcache.cc:995: "tmpbuf" in 3.HEAD-CVS

Amos Jeffries wrote:

>>>> safe_free happily accepts NULLs.. hence the name safe_...
>>> I forget exactly why it was there. Likely a crash when it was
>>> non-NULL when it should have been NULL. Fixed now anyway.
>>
>> Current CVS (checkout two minutes ago at 11.35pm GMT) is pretty much
>> broken again regarding the internal DNS. Pages don't open when you hit
>> a CNAME and I get frequent errors like
>>
>> 2008/01/12 00:33:12| ipcacheParse: No Address records in response to
>> 'www.hp.com'
>> 2008/01/12 00:33:37| ipcacheParse: No Address records in response to
>> 'welcome.hp-ww.com'
>> 2008/01/12 00:36:15| ipcacheParse: No Address records in response to
>> 'www.google-analytics.com'
>>
>> in the cache.log. It looks like DNS times out a couple of times.
>> Debugging section 14 does not give more results. The query
>>
>> 00:41:59.075658 IP 83.170.1.240.36282 > 83.170.1.240.53: 37174+ AAAA?
>> www.hp.com. (28)
>> 00:41:59.075913 IP 83.170.1.240.53 > 83.170.1.240.36282: 37174 1/1/0
>> CNAME www.hpgtm.nsatc.net. (116)
>>
>> is repeated several times. This only seems to happen when you hit a
>> CNAME on an IPv4-only host, CNAME to dual-stacked or IPv4-only with an
>> address directly associated to the hostname works.
>
> Sigh, thats so weird.
>
> Sorry the proper debug options to trace this are:
> debug_options ALL,0 14,9 78,9
>
>
> It's working perfectly here. On those same domains too.

Found out it breaks when you set

dns_v4_fallback no

in the config. If you do, the debugging output is

2008/01/12 14:54:53.740| ipcache_nbgethostbyname: Name 'welcome.hp-ww.com'.
2008/01/12 14:54:53.740| ipcache_nbgethostbyname: MISS for
'welcome.hp-ww.com'
2008/01/12 14:54:53.740| idnsALookup: buf is 35 bytes for
welcome.hp-ww.com, id = 0xa75e
2008/01/12 14:54:53.925| idnsRead: starting with FD 7
2008/01/12 14:54:53.925| idnsRead: FD 7: received 142 bytes from
83.170.1.240:53
2008/01/12 14:54:53.925| idnsGrokReply: ID 0xa75e, 1 answers
2008/01/12 14:54:53.925| dns_internal.cc(1075) idnsGrokReply: Sending 1
DNS results to caller.
2008/01/12 14:54:53.925| ipcacheParse: No Address records in response to
'welcome.hp-ww.com'
2008/01/12 14:55:01.223| ipcache_purgelru: removed 0 entries
2008/01/12 14:55:11.235| ipcache_purgelru: removed 0 entries
2008/01/12 14:55:21.250| ipcache_purgelru: removed 0 entries

If you don't do it it works, but at least back when you added it it was
desperately needed.

Regards,
Bernhard
Received on Sat Jan 12 2008 - 07:03:11 MST