[ http://issues.apache.org/jira/browse/MODPYTHON-76?page=all ]
Graham Dumpleton reassigned MODPYTHON-76:
-----------------------------------------
Assign To: Graham Dumpleton
> input filter hangs in combination with mod_proxy
> ------------------------------------------------
>
> Key: MODPYTHON-76
> URL: http://issues.apache.org/jira/browse/MODPYTHON-76
> Project: mod_python
> Type: Bug
> Components: core
> Versions: 3.2.7, 3.1.4
> Environment: Linux, Apache 2.024 and unreleased Apache 2.0.x svn version.
> Reporter: Martijn Faassen
> Assignee: Graham Dumpleton
>
> Input filters hang when mod_proxy is in use. Other behavior seen is infinite
> calls of the input filter function even though the data has already
> been processed.
> In Apache 2.0.24, this problem seems to be fundamental; I have no way to get
> rid of the hang, except perhaps in the case of an input filter that
> does not change the size of the passed-through data.
> In svn Apache, the problem goes away as soon as I remove the filter.flush()
> in apache.py's FilterDispatch handler. svn Apache does according to its
> changelog contain a fix to mod_proxy's handling of input filters.
> For my application, use of mod_proxy is essential, as mod_python is
> essentially proxying another web server process.
> Output filters do not seem to be affected by the presence of filter.flush(),
> and in fact filter.flush() is important to make sure memory use remains small
> when handling large amounts of data being outputted by the server.
> All of this is rather hairy and I don't know quite what to blame; part of
> this seems indeed due to Apache itself, but perhaps not everything.
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