Webware for Python

Hi Jehiah,

Is this happening on some requests (occasionally), or on every request?

If only occasionally, it's possible that some network tool or software is connecting directly to your appserver (on port 8080 or whatever you are using), and that the request is not coming via Apache.  I've seen this happen; the solution is to firewall the appserver port so that is it only accessible on localhost (assuming apache and webware are running on the same host).

peace,
Jason

--
Jason Hildebrand
PeaceWorks Computer Consulting
#2 - 396 Assiniboine Ave, Winnipeg
204 480 0314   --or--   519 725 7875, ext 620.

----- "Jehiah Czebotar" <jehiah@...> wrote:

> I'm in the process of upgrading to Webware 1.0 and when i'm trying
> use
> use webkit (via mod_webkit2) i get this error
> 
> File "/usr/local/Webware/WebKit/ThreadedAppServer.py", line 916, in
> receiveDict
>     return loads(chunk)
> EOFError: EOF read where object expected
> 
> I am only having this problem on some machines but i haven't been
> able
> to narrow down what is causing it. All configurations and libraries
> seem to be the same.
> 
> If anyone on this list has any suggestions I'd appreciate it.
> 
> -- 
> Jehiah
> http://jehiah.cz/
> 
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Thanks for the ideas Jason, i actually just nailed the problem (after
troubleshooting along with a few other people for a few days)

I opened this bug for it (with a patch attached)

https://sourceforge.net/tracker2/?func=detail&aid=2524767&group_id=4866&atid=104866

It's a problem in ThreadedAppServer keeping track of the # of bytes
remaining to be read from the socket, which is only apparent when
there is some delay in receiving data. (which for me means when webkit
and apache are on different servers). So that also explains why it was
intermittent.

--
Jehiah
http://jehiah.cz/

On Tue, Jan 20, 2009 at 3:58 PM, Jason Hildebrand <jason@...> wrote:
> Hi Jehiah,
>
> Is this happening on some requests (occasionally), or on every request?
>
> If only occasionally, it's possible that some network tool or software is connecting directly to your appserver (on port 8080 or whatever you are using), and that the request is not coming via Apache.  I've seen this happen; the solution is to firewall the appserver port so that is it only accessible on localhost (assuming apache and webware are running on the same host).
>
> peace,
> Jason
>
> --
> Jason Hildebrand
> PeaceWorks Computer Consulting
> #2 - 396 Assiniboine Ave, Winnipeg
> 204 480 0314   --or--   519 725 7875, ext 620.
>
> ----- "Jehiah Czebotar" <jehiah@...> wrote:
>
>> I'm in the process of upgrading to Webware 1.0 and when i'm trying
>> use
>> use webkit (via mod_webkit2) i get this error
>>
>> File "/usr/local/Webware/WebKit/ThreadedAppServer.py", line 916, in
>> receiveDict
>>     return loads(chunk)
>> EOFError: EOF read where object expected
>>
>> I am only having this problem on some machines but i haven't been
>> able
>> to narrow down what is causing it. All configurations and libraries
>> seem to be the same.
>>
>> If anyone on this list has any suggestions I'd appreciate it.
>>
>> --
>> Jehiah
>> http://jehiah.cz/
>>

Jason Hildebrand schrieb:
> If only occasionally, it's possible that some network tool or 
> software is connecting directly to your appserver (on port 8080 or 
> whatever you are using), and that the request is not coming via 
> Apache. I've seen this happen; the solution is to firewall the
> appserver port so that is it only accessible on localhost (assuming
> apache and webware are running on the same host).

You can also restrict access by setting Host = 'localhost' in 
AppServer.config (which is the default).

Is there anything visible in the log when the request happens?

-- Christoph

Jehiah Czebotar schrieb:
> It's a problem in ThreadedAppServer keeping track of the # of bytes
> remaining to be read from the socket, which is only apparent when
> there is some delay in receiving data. (which for me means when webkit
> and apache are on different servers). So that also explains why it was
> intermittent.

Thank you Jehiah, I can confirm your analysis and patch. It's already 
checked in as r7749. This bug slipped in when I added the SCGIAdapater, 
which had a similar problem. Unfortunately, such bugs are never found in 
the beta version, no matter how long the beta phase is :-( I think I'll 
make a bug fix release soon.

-- Christoph