[ic] intermittent 500 error with Link.pm

[Frank Reitzenstein]

Grant wrote:
>>>>>> My guess would be that that is happening when the client's connection is
>>>>>> broken and Apache closes its filehandles that the program is writing to.
>>>>> I think you're exactly right but can I handle that scenario properly in
>>>>> Link.pm so that a 500 is not produced?
>>>> I'm not sure.
>>>>
>>>> But what do you think it should do if not a 500? It certainly isn't a 2xx
>>>> result.
>>>>
>>>> The C-based vlink program that we normally use throws 500s in this situation
>>>> too.
>>> Should it be an internal server error though?  It sounds like this
>>> happens due to normal client activity and the server should hopefully
>>> be able to handle that gracefully and return a more accurate HTTP
>>> status code without bothering the error_log.
>>>
>>> I tried this in Link.pm but no change in error.log output:
>>>
>>> print @out or die "print: $!\n";
>>>
>> Are you using Postgresql?
>>
>> I built the Strap Store on Ubuntu 15.04 before it was released and I
>> fixed a problem which sounds like that one by reverting back to Mysql.
>> The problem was occurring specifically in a Matrix option ie only on
>> pages with options displayed.
>
> I'm using mysql with IC (and postgresql with Odoo) and I actually
> don't use IC options at all.  This seems to be a pretty common issue
> with apache2.  There's some discussion about it as it relates to a
> different software package here:
>
> https://github.com/eprints/eprints/issues/119
>
> Here's how they work around it:
>
> https://github.com/QUTlib/eprints/commit/cc46ff68c19d7251ee525842fbef391e54e269c5
>
> - Grant
>
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Thankyou Grant. I got my server from home working really nicely, but it
was months of work. Maybe I'm not a real computer guy, but generally I
find that nothing works, but I am a stubborn German and always succeed
in the end.