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16dcf5959f
Make the reference to the 1.3 FAQ a little more up-to-date; and add a FAQ on SELinux. git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@240301 13f79535-47bb-0310-9956-ffa450edef68
109 lines
6.5 KiB
XML
109 lines
6.5 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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This file is generated from xml source: DO NOT EDIT
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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-->
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<title>Error Messages - Frequently Asked Questions - Apache HTTP Server</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
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<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" />
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<link href="../images/favicon.ico" rel="shortcut icon" /></head>
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<body id="manual-page" class="no-sidebar"><div id="page-header">
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
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<p class="apache">Apache HTTP Server Version 2.1</p>
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<img alt="" src="../images/feather.gif" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs-project/">Documentation</a> > <a href="../">Version 2.1</a> > <a href="./">FAQ</a></div><div id="page-content"><div id="preamble"><h1>Error Messages - Frequently Asked Questions</h1>
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<div class="toplang">
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<p><span>Available Languages: </span><a href="../en/faq/error.html" title="English"> en </a> |
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<a href="../ja/faq/error.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
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<a href="../ko/faq/error.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
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</div>
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</div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="error" id="error">Error Messages</a></h2>
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<ul>
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<li><a href="#error.sendfile">Invalid argument:
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core_output_filter: writing data to the network</a></li>
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<li><a href="#error.acceptex">AcceptEx failed</a></li>
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<li><a href="#error.scriptheaders">Premature end of script
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headers</a></li>
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<li><a href="#error.permissiondenied">Permission denied</a></li>
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</ul>
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<h3><a name="error.sendfile" id="error.sendfile">Invalid argument:
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core_output_filter: writing data to the network</a></h3>
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<p>Apache uses the <code>sendfile</code> syscall on platforms
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where it is available in order to speed sending of responses.
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Unfortunately, on some systems, Apache will detect the presence of
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<code>sendfile</code> at compile-time, even when it does not work
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properly. This happens most frequently when using network or
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other non-standard file-system.</p>
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<p>Symptoms of this problem include the above message in the error
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log and zero-length responses to non-zero-sized files. The
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problem generally occurs only for static files, since dynamic
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content usually does not make use of <code>sendfile</code>.</p>
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<p>To fix this problem, simply use the <code class="directive"><a href="../mod/core.html#enablesendfile">EnableSendfile</a></code> directive to disable
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<code>sendfile</code> for all or part of your server. Also see
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the <code class="directive"><a href="../mod/core.html#enablemmap">EnableMMAP</a></code>, which can
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help with similar problems.</p>
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<h3><a name="error.acceptex" id="error.acceptex">AcceptEx Failed</a></h3>
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<p>If you get error messages related to the <code>AcceptEx</code> syscall
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on win32, see the <code class="directive"><a href="../mod/mpm_winnt.html#win32disableacceptex">Win32DisableAcceptEx</a></code>
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directive.</p>
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<h3><a name="error.scriptheaders" id="error.scriptheaders">Premature end of script
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headers</a></h3>
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<p>Most problems with CGI scripts result in this message written in the
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error log together with an <code>Internal Server Error</code> delivered
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to the browser. A guide to helping debug this type of problem is
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available in the <a href="../howto/cgi.html#troubleshoot">CGI
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tutorial</a>.</p>
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<h3><a name="error.permissiondenied" id="error.permissiondenied">Permission denied</a></h3>
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<p>A <code>Permission denied</code> error in the
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<code>error_log</code>, accompanied by a <code>Forbidden</code>
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message to the client usually indicates a problem with your
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filesystem permissions, rather than a problem in the Apache HTTP
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Server configuration files. Check to make sure that the
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<code class="directive"><a href="../mod/mpm_common.html#user">User</a></code> and <code class="directive"><a href="../mod/mpm_common.html#group">Group</a></code> running the child processes
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has adequate permission to access the files in question. Also
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check that the directory and all parent directories are at least
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searchable for that user and group (i.e., <code>chmod
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+x</code>).</p>
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<p>Recent Redhat versions and other Linux distributions using
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SELinux have additional access restrictions beyond those used by
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the basic filesystem. Violations of these restrictions will also
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result in a <code>Permission denied</code> message. See the
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Redhat <a href="http://fedora.redhat.com/docs/selinux-faq-fc3/">SELinux
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FAQ</a> and <a href="http://fedora.redhat.com/docs/selinux-apache-fc3/">Apache
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SELinux Policy Document</a>.</p>
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</div></div>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/faq/error.html" title="English"> en </a> |
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<a href="../ja/faq/error.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
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<a href="../ko/faq/error.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
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</div><div id="footer">
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<p class="apache">Copyright 1995-2005 The Apache Software Foundation or its licensors, as applicable.<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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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div>
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</body></html> |