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[EP-tech] Re: Error "Apache2 IO write: (103)"

Am 22.03.2014 16:13, schrieb Centro de Documentación:

Hi guys,

I've noticed lots of "Apache2 IO write: (103) Software caused
connection abort" messages appearing in our apache log. I'm worried
because there are a lot of them. I think it's something unusual.

Can something force eprints to stop a file retrieval? I mean something
strange that could cause it.

Is there a relationship between those messages and errors 500?

I'm running EPrints 3.3.10, Apache 2.2.22, mod_perl/2.0.7



Hi,
my patch - thanks to Sebastien, we mailed about this (or maybe a related?) issue last year - does not eliminate the "Software caused ..." events, just checked the logs, but there should be fewer chances for user agents to make massively parallel requests since this is explicitly demotivated by header Accept-Ranges: none. Look if it reduces those errors at least. EPrints should not deliver big pdf files in parallel chunks as the system will likely read the whole file into memory. I am not quite optimistic about Webserver processes able to share a file in cache. 

In EPrints/Apache/Storage.pm, line 183ff, change
        EPrints::Apache::AnApache::header_out(
                $r,
                "Accept-Ranges" => "none" # was "bytes"
        );

Caution: Any streamed A/V media might cease to work because of it.

I think that a certain share of aborted request come from search bots.
May it work for you nonetheless :-), would like to know if there is a significant change in the ratio of "Software caused" events by all error lines. 

Florian


Regards,

Cristian

/////////////////////////////////////////////

Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7d9657610)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4eab28)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4e8f60)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4e8c30)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4e4648)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7db885738)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4e8c30)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4f5a38)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4dd140)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4ec058)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7d9657610)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7d9657610)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7db853200)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 258
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4e7708)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7db889d80)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 258
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4e9a58)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 258
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4e8fd8)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 258
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7db88c388)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 258
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7db84bc40)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 258
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7dc4f1d48)')
called at -e line 0
     eval {...} called at -e line 0
------------------------------------------------------------------
---------------- EPrints System Error ----------------------------
------------------------------------------------------------------
Error in file retrieval: :Apache2 IO write: (103) Software caused
connection abort at
/usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 207
------------------------------------------------------------------
  at /usr/share/eprints3/perl_lib/EPrints/Apache/Storage.pm line 267
     EPrints::Apache::Storage::handler('Apache2::RequestRec=SCALAR(0x7fa7db891e78)')
called at -e line 0
     eval {...} called at -e line 0
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Ha OK - I hadn't seen in that way - using Range for parallel downloading 
of the same resource. Naughty...

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--- End Message ---