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  <div class="section" id="version-4-5-6">
<h1>Version 4.5.6<a class="headerlink" href="#version-4-5-6" title="Permalink to this headline">¶</a></h1>
<p>Version 4.5.6 of mod_wsgi can be obtained from:</p>
<blockquote>
<div><a class="reference external" href="https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.5.6">https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.5.6</a></div></blockquote>
<div class="section" id="bugs-fixed">
<h2>Bugs Fixed<a class="headerlink" href="#bugs-fixed" title="Permalink to this headline">¶</a></h2>
<ol class="arabic simple">
<li>Reinstanted change to associate any messages logged via <tt class="docutils literal"><span class="pre">sys.stdout</span></tt>
and <tt class="docutils literal"><span class="pre">sys.stderr</span></tt> back to the request so that Apache can log them
with the correct request log ID. This change was added in 4.5.4, but
was reverted in 4.5.5 as the change was causing process crashes under
Python 3.</li>
<li>When using Apache 2.4 use new style <tt class="docutils literal"><span class="pre">Require</span></tt> directive instead of
older <tt class="docutils literal"><span class="pre">Order</span></tt> and <tt class="docutils literal"><span class="pre">Allow</span></tt> when setting up access controls for
<tt class="docutils literal"><span class="pre">mod_wsgi-express</span></tt>. This fixes a problem where when using
<tt class="docutils literal"><span class="pre">--include-file</span></tt> and <tt class="docutils literal"><span class="pre">Require</span></tt> directive was being used. Precedence
order was such that older directives were overriding new directive and
it was possible to permit access to additional directories when using
custom configuration.</li>
<li>Django 1.10 requires that management commands use argparse style
options but <tt class="docutils literal"><span class="pre">mod_wsgi-express</span></tt> uses optparse style options. Can no
longer simply merge main script option list to get management command
option list. Instead need to convert optparse list to argparse format on
the fly, as still need to retain main script option list as optparse
until drop Python 2.6 support. Changes stop <tt class="docutils literal"><span class="pre">runmodwsgi</span></tt> management
command failing when using Django 1.10+.</li>
</ol>
</div>
<div class="section" id="new-features">
<h2>New Features<a class="headerlink" href="#new-features" title="Permalink to this headline">¶</a></h2>
<ol class="arabic">
<li><p class="first">Added <tt class="docutils literal"><span class="pre">startup-timeout</span></tt> option to <tt class="docutils literal"><span class="pre">WSGIDaemonProcess</span></tt> directive.
If set and the first loading of the WSGI application script file
fails, then if no subsequent attempt to load it succeeds within the
specified startup timeout, the daemon process will be restarted. When
configuring mod_wsgi directly, the option is not enabled by default.
The option is exposed via <tt class="docutils literal"><span class="pre">mod_wsgi-express</span></tt> with a default value
of 15 seconds.</p>
<p>This would be used where running the Django web framework and there is
a risk of the database not being available, causing Django initialisation
to fail. Django doesn&#8217;t allow initialisation to be performed a second
time in the same process, meaning it will then constantly fail. Use of
startup timeout will allow the process to be restarted in face of such
constant startup failures. If the database is available when the
process is restarted, then next time the process starts, everything
should be fine.</p>
<p>Do note that this option should preferably only be used where the one
WSGI application has been delegated to a WSGI daemon process. This is
because if multiple WSGI applications are hosted out of the daemon
process group, be they in the same application group or distinct ones,
as soon as any one of them loads successfully, then the startup timeout
is disabled, meaning that if a subsequent one loaded is constantly
failing, then a process restart will not occur. Best practice is to
delegate each WSGI application to a distinct daemon process group.</p>
</li>
</ol>
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