Mailing List Archive: internal dummy connection

internal dummy connection

Jun 4, 2017, 11:30 PM

Post #1 of 3 (1263 views)

I saw many items like these in log,

::1 - - [05/Jun/2017:14:29:06 +0800] "OPTIONS * HTTP/1.0" 200 125 "-"
"Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0
mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
::1 - - [05/Jun/2017:14:29:07 +0800] "OPTIONS * HTTP/1.0" 200 125 "-"
"Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0
mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
::1 - - [05/Jun/2017:14:29:08 +0800] "OPTIONS * HTTP/1.0" 200 125 "-"
"Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0
mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
::1 - - [05/Jun/2017:14:29:09 +0800] "OPTIONS * HTTP/1.0" 200 125 "-"
"Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0
mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"

what does it mean? why it exists? thanks.

Re: internal dummy connection [ In reply to ]

Holger.Kipp at alogis

Jun 5, 2017, 1:49 AM

Post #2 of 3 (1262 views)

Permalink

You might simply want to google it (e.g. "mod_perl internal dummy connection")

https://knackforge.com/blog/sivaji/mitigating-apache-internal-dummy-connection-issue

Best regards,
Holger

On 5. Jun 2017, at 08:31, Peng Yonghua <pyh@vodafonemail.de<mailto:pyh@vodafonemail.de>> wrote:

I saw many items like these in log,

::1 - - [05/Jun/2017:14:29:06 +0800] "OPTIONS * HTTP/1.0" 200 125 "-" "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0 mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
::1 - - [05/Jun/2017:14:29:07 +0800] "OPTIONS * HTTP/1.0" 200 125 "-" "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0 mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
::1 - - [05/Jun/2017:14:29:08 +0800] "OPTIONS * HTTP/1.0" 200 125 "-" "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0 mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
::1 - - [05/Jun/2017:14:29:09 +0800] "OPTIONS * HTTP/1.0" 200 125 "-" "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0 mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"

what does it mean? why it exists? thanks.

Re: internal dummy connection [ In reply to ]

pyh at vodafonemail

Jun 5, 2017, 1:57 AM

Post #3 of 3 (1262 views)

Permalink

from the url:

When the Apache HTTP Server manages its child processes, it needs a way
to wake up processes that are listening for new connections. To do this,
it sends a simple HTTP request back to itself.

So, why apache want to wake up child processes periodically? It can do
this based on event mechanism, only when new request is coming in, the
child will be woken up.

thanks.

On 2017/6/5 ??? 16:49, Holger Kipp wrote:
> You might simply want to google it (e.g. "mod_perl internal dummy
> connection")
>
> https://knackforge.com/blog/sivaji/mitigating-apache-internal-dummy-connection-issue
>
> Best regards,
> Holger
>
> On 5. Jun 2017, at 08:31, Peng Yonghua <pyh@vodafonemail.de
> <mailto:pyh@vodafonemail.de>> wrote:
>
>> I saw many items like these in log,
>>
>> ::1 - - [05/Jun/2017:14:29:06 +0800] "OPTIONS * HTTP/1.0" 200 125 "-"
>> "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0
>> mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
>> ::1 - - [05/Jun/2017:14:29:07 +0800] "OPTIONS * HTTP/1.0" 200 125 "-"
>> "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0
>> mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
>> ::1 - - [05/Jun/2017:14:29:08 +0800] "OPTIONS * HTTP/1.0" 200 125 "-"
>> "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0
>> mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
>> ::1 - - [05/Jun/2017:14:29:09 +0800] "OPTIONS * HTTP/1.0" 200 125 "-"
>> "Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.21 mod_apreq2-20090110/2.8.0
>> mod_perl/2.0.8 Perl/v5.18.2 (internal dummy connection)"
>>
>> what does it mean? why it exists? thanks.