<p>If you want to find out the compile time chosen default
for your system, you may set your <code class="directive"><a href="../mod/core.html#loglevel">LogLevel</a></code> to <code>debug</code>. Then the default <code class="directive">AcceptMutex</code> will be written into the <code class="directive"><a href="../mod/core.html#errorlog">ErrorLog</a></code>.</p>
+ <div class="warning"><h3>Warning</h3>
+ <p>On most systems, when the <code>pthread</code> option
+ is selected, if a child process terminates abnormally
+ while holding the <code>AcceptCntl</code> mutex the
+ server will stop responding to requests. When this
+ occurs, the server will require a manual restart to
+ recover.</p>
+ <p>Solaris is a notable exception as it provides a
+ mechanism, used by Apache, which usually allows the
+ mutex to be recovered after a child process terminates
+ abnormally while holding a mutex.</p>
+ <p>If your system implements the
+ <code>pthread_mutexattr_setrobust_np()</code> function,
+ you may be able to use the <code>pthread</code> option safely.</p>
+ </div>
+
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="CoreDumpDirectory" id="CoreDumpDirectory">CoreDumpDirectory</a> <a name="coredumpdirectory" id="coredumpdirectory">Directive</a></h2>
>AcceptMutex</directive> will be written into the <directive
module="core">ErrorLog</directive>.</p>
- <note type="warning"><strong>Warning:</strong>
+ <note type="warning"><title>Warning</title>
<p>On most systems, when the <code>pthread</code> option
is selected, if a child process terminates abnormally
while holding the <code>AcceptCntl</code> mutex the