rubbos/app/httpd-2.0.64/docs/manual/faq/error.html.en

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   8 <title>Error Messages - Frequently Asked Questions - Apache HTTP Server</title>
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  15 <p class="apache">Apache HTTP Server Version 2.0</p>
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  19 <a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.0</a> &gt; <a href="./">FAQ</a></div><div id="page-content"><div id="preamble"><h1>Error Messages - Frequently Asked Questions</h1>
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  21 <p><span>Available Languages: </span><a href="../en/faq/error.html" title="English">&nbsp;en&nbsp;</a> |
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  27 <div class="section">
  28 <h2><a name="error" id="error">Error Messages</a></h2>
  29     <ul>
  30     <li><a href="#error.sendfile">Invalid argument:
  31     core_output_filter: writing data to the network</a></li>
  32     <li><a href="#error.acceptex">AcceptEx failed</a></li>
  33     <li><a href="#error.scriptheaders">Premature end of script
  34     headers</a></li>
  35     </ul>
  36
  37     <h3><a name="error.sendfile" id="error.sendfile">Invalid argument:
  38     core_output_filter: writing data to the network</a></h3>
  39
  40     <p>Apache uses the <code>sendfile</code> syscall on platforms
  41     where it is available in order to speed sending of responses.
  42     Unfortunately, on some systems, Apache will detect the presence of
  43     <code>sendfile</code> at compile-time, even when it does not work
  44     properly.  This happens most frequently when using network or
  45     other non-standard file-system.</p>
  46
  47     <p>Symptoms of this problem include the above message in the error
  48     log and zero-length responses to non-zero-sized files.  The
  49     problem generally occurs only for static files, since dynamic
  50     content usually does not make use of <code>sendfile</code>.</p>
  51
  52     <p>To fix this problem, simply use the <code class="directive"><a href="../mod/core.html#enablesendfile">EnableSendfile</a></code> directive to disable
  53     <code>sendfile</code> for all or part of your server.  Also see
  54     the <code class="directive"><a href="../mod/core.html#enablemmap">EnableMMAP</a></code>, which can
  55     help with similar problems.</p>
  56
  57
  58
  59     <h3><a name="error.acceptex" id="error.acceptex">AcceptEx Failed</a></h3>
  60
  61     <p>If you get error messages related to the <code>AcceptEx</code> syscall
  62     on win32, see the <code class="directive"><a href="../mod/mpm_winnt.html#win32disableacceptex">Win32DisableAcceptEx</a></code>
  63     directive.</p>
  64
  65
  66
  67     <h3><a name="error.scriptheaders" id="error.scriptheaders">Premature end of script
  68     headers</a></h3>
  69
  70     <p>Most problems with CGI scripts result in this message written in the
  71     error log together with an <code>Internal Server Error</code> delivered
  72     to the browser.  A guide to helping debug this type of problem is
  73     available in the <a href="../howto/cgi.html#troubleshoot">CGI
  74     tutorial</a>.</p>
  75
  76
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  79 <p><span>Available Languages: </span><a href="../en/faq/error.html" title="English">&nbsp;en&nbsp;</a> |
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  83 <p class="apache">Copyright 2009 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
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