[users@httpd] 2.0.48 : httpd no longer answering requests

[Michel Jouvin <jo...@lal.in2p3.fr>]

Hi,

I am experiencing a severe problem with Apache 2.0.48 running on HP Tru64 
v5.1B with worker MPM. When this problem appeared is not clear but now, one 
or 2 time a day httpd is no longer answering requests. The only way to 
clear the problem seems to restart httpd (graceful restart is ok). This 
problem seems a bit similar to Peter Poter Veestergaard's post "http server 
hangs on non consuming client", except the platform is not at all the 
same...

At the time the problem occurs, there is generally not a lot of 
connections. But it seems the server will never recover by itself (I 
already waited for hours...). It doesn't seem to time out at some point. I 
thought about lowering 'Timeout' value from default value (300) but this is 
just a workaround and I am not sure it will improve anything as this 'hang' 
doesn't seem to timeout.

There is no error message in any Apache (or system) log files. There are 
some times (but not always) error messages about 'Too many open files' in 
apr_accept in the hour before but I don't think it is related (this is not 
close enough to the error).

We checked a lot of things in the network configuration and tunning and 
this doesn't seem to be related to a system configuration issue. I'd 
appreciated any help on how to get more useful information on what is 
happening, what is httpd state, ... (tcpdump, force httpd coredump...???).

Thanks in advance for any help.

Michel



     *************************************************************
     * Michel Jouvin                 Email : jouvin@lal.in2p3.fr *
     * LAL / CNRS                    Tel : +33 1 64468932        *
     * B.P. 34                       Fax : +33 1 69079404        *
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