Re: Regarding Apache 2.0.48 and specweb99

[gr...@apache.org]

making public per Madhu

MATHIHALLI,MADHUSUDAN (HP-Cupertino,ex1) wrote:
> I'm using 2.0.48 and also back-ported the cgid-restart patch to 2.0.48. I
> got a little further on the issue : The Apache hang is definitely caused by
> the cgid exiting.

cgid should _never_ exit without something in the error log.  That makes it 
sound like a core problem, i.e. ap_process_child_status() or a signal handler is 
fubar, in addition to whatever made the cgi daemon die.

But if that is in fact happening, I would trace syscalls & signals for the cgid 
process.  (can't remember what the HPUX trace program is called, but you want 
something similar to truss/strace)

> Here's what I think is happening : the SPECweb99 clients have stopped
> waiting for the post log, but the CGID exited in the middle of the
> processing - thus causing the SPECweb99 clients to hang (and hence Apache
> also to hang) 
 >
> -Madhu

hmmm, remember the mod_specweb99 locking change for the post log?  I wonder if 
that is related?    But AFAIK the DYN_CGI_SCRIPT cgi only does GETs, in which 
case locking on the post log won't matter.  Or are you using a cgi for more than 
just DYN_CGI_SCRIPT?

Greg

>>-----Original Message-----
>>From: gregames@apache.org [mailto:gregames@apache.org]
>>Sent: Thursday, November 20, 2003 6:27 AM
>>To: MATHIHALLI,MADHUSUDAN (HP-Cupertino,ex1)
>>Subject: Re: Regarding Apache 2.0.48 and specweb99
>>
>>
>>MATHIHALLI,MADHUSUDAN (HP-Cupertino,ex1) wrote:
>>
>>>Hi Greg,
>>>	The recent set of discussions prompted me to get some 
>>
>>Apache numbers
>>
>>>out there - and when I started with the SPECweb99 run, I 
>>
>>experienced a major
>>
>>>hang in the Apache, and the cgid daemon getting killed (I 
>>
>>don't know how).
>>
>>>Have you also seen something similar ?
>>
>>Madhu,
>>
>>No, that sounds really bad.  But to be honest, I had CGI 
>>turned off in the spec 
>>rc file  because I had some config type problem with CGIs that 
>>I didn't bother 
>>to resolve.  I will see if I can make some progress on 2.0.48 
>>+ spec + CGI today 
>>(barring day job interruptions) and let you know what happens.
>>
>>I would think that cgid would be more reliable than ever.  I 
>>know Jeff Trawick 
>>fixed a double close bug and someone put in logic to let it restart 
>>automatically.  But who knows?
>>
>>Greg
>>
> 
> 
>