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Date: Tue, 26 Nov 2013 22:49:39 +0100
From: olli hauer <ohauer@gmx.de>
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To: dev@httpd.apache.org
Subject: Re: Issue with apr-1.5.0 on FreeBSD 10beta3
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On 2013-11-26 22:01, Rainer Jung wrote:
> On 26.11.2013 15:58, olli hauer wrote:
>> On 2013-11-25 23:25, Jeff Trawick wrote:
> 
>>> See if this brings any happiness:
>>>
>>> Index: network_io/unix/sockets.c
>>> ===================================================================
>>> --- network_io/unix/sockets.c (revision 1545394)
>>> +++ network_io/unix/sockets.c (working copy)
>>> @@ -273,7 +273,7 @@
>>>  #endif /* TCP_NODELAY_INHERITED */
>>>  #if APR_O_NONBLOCK_INHERITED
>>>      if (apr_is_option_set(sock, APR_SO_NONBLOCK) == 1) {
>>> -        apr_set_option(*new, APR_SO_NONBLOCK, 1);
>>> +        /* apr_set_option(*new, APR_SO_NONBLOCK, 1); */
>>>      }
>>>  #endif /* APR_O_NONBLOCK_INHERITED */
>>
>>
>> I can confirm after removing the line in apr-1.5.0 apache24 no longer hangs.
>> (tested with apache-2.4.6 / 2.4.7)
>>
>> I seen now why this is triggered by comparing apr.h after `./configure',
>>
>>> grep APR_O_NONBLOCK_INHERITED work/apr-1.4.8/include/apr.h
>> ./work/apr-1.4.8/include/apr.h:#define APR_O_NONBLOCK_INHERITED 0
>>
>>> grep APR_O_NONBLOCK_INHERITED work/apr-1.5.0/include/apr.h
>> work/apr-1.5.0/include/apr.h:#define APR_O_NONBLOCK_INHERITED 1
>>
>>
>>> There are some APR 1.5 autoconf changes to consider at
>>> http://svn.apache.org/viewvc/apr/apr/branches/1.5.x/build/apr_network.m4?view=log
>>
>> OK, backing out the changes from r1502805 seems to do the trick on 10b3
>> http://svn.apache.org/viewvc?view=revision&revision=1502805
>>
>>> grep APR_O_NONBLOCK_INHERITED work/apr-1.5.0/include/apr.h
>> work/apr-1.5.0/include/apr.h:#define APR_O_NONBLOCK_INHERITED 0
> 
> But acking out that change simply breaks the configure test on any
> platform, because the resulting detection program no longer compiles.
> 
> So the real culprit, is that the detection isn't doing the right thing.
> 
> The test was changed before the compilation fix in the following revision:
> 
> http://svn.apache.org/viewvc/apr/apr/branches/1.5.x/build/apr_network.m4?r1=887002&r2=1449569&pathrev=1502805&diff_format=h
> 
> That was due to the fact that I saw the test providing unreliable
> results on a busy machine.
> 
> So the question to me is: is the O_NONBLOCK setting inherited from a
> listening socket on FreeBSD 10 - that's what the test tries to detect -
> and how can we fix this feature test?
> 
> Or: is the test correct, but it previously failed for systems, where the
> Apache or APR code does not do the right thing if the test would have
> succeeded.
> 

Good questions ...

Apache is running fine even with "APR_O_NONBLOCK_INHERITED 1" in apr.h, except
- V4 mapping is enabled and in httpd.conf a Listen directive without IP
  address e.g. "Listen 80" is given and then only if requested from a remote host.
  ( a simple echo "GET /" | nc $lo0-address 80 is working )


-- 
Regards,
olli