mirror of
https://github.com/apache/httpd.git
synced 2025-06-04 21:42:15 +03:00
5347b4715f
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@421086 13f79535-47bb-0310-9956-ffa450edef68
299 lines
16 KiB
XML
299 lines
16 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
|
|
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
This file is generated from xml source: DO NOT EDIT
|
|
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
-->
|
|
<title>Frequently Asked Questions - Apache HTTP Server</title>
|
|
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
|
|
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
|
|
<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" />
|
|
<link href="../images/favicon.ico" rel="shortcut icon" /></head>
|
|
<body id="manual-page"><div id="page-header">
|
|
<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>
|
|
<p class="apache">Apache HTTP Server Version 2.3</p>
|
|
<img alt="" src="../images/feather.gif" /></div>
|
|
<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
|
|
<div id="path">
|
|
<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.3</a> > <a href="./">FAQ</a></div><div id="page-content"><div id="preamble"><h1>Frequently Asked Questions</h1>
|
|
<div class="toplang">
|
|
<p><span>Available Languages: </span><a href="../en/faq/all_in_one.html" title="English"> en </a> |
|
|
<a href="../ja/faq/all_in_one.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
|
|
<a href="../ko/faq/all_in_one.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
|
|
</div>
|
|
|
|
<p>The latest version of this FAQ is always available from the main Apache
|
|
web site, at <<a href="http://httpd.apache.org/docs/trunk/faq/">http://httpd.apache.org/docs/trunk/faq/</a>>.</p>
|
|
|
|
<p>If you don't find the answer to your question in the below
|
|
sections, please also consult the <a href="http://httpd.apache.org/docs/misc/FAQ.html">Apache 1.3
|
|
FAQ</a> to see if your question is answered there.</p>
|
|
</div>
|
|
<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#topics">Topics</a></li>
|
|
<li><img alt="" src="../images/down.gif" /> <a href="#background">Background</a></li>
|
|
<li><img alt="" src="../images/down.gif" /> <a href="#support">Support</a></li>
|
|
<li><img alt="" src="../images/down.gif" /> <a href="#error">Error Messages</a></li>
|
|
</ul></div>
|
|
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
|
<div class="section">
|
|
<h2><a id="topics" name="topics">Topics</a></h2>
|
|
<dl><dt><a href="#background">Background</a></dt><dd>Background information about the Apache HTTP Server.</dd>
|
|
<dt><a href="#support">Support</a></dt><dd>What do I do when I have problems?</dd>
|
|
<dt><a href="#error">Error Messages</a></dt><dd>What does this error message mean?</dd>
|
|
</dl></div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
|
<div class="section">
|
|
<h2><a name="background" id="background">Background</a></h2>
|
|
|
|
<ul>
|
|
<li><a href="#background.what-is-apache">What is Apache?</a></li>
|
|
<li><a href="#background.what-is-httpd">What is the Apache HTTP
|
|
Server?</a></li>
|
|
<li><a href="#background.tested">How thoroughly tested is
|
|
Apache?</a></li>
|
|
<li><a href="#background.logo">May I use the Apache logo on my
|
|
product or Web site?</a></li>
|
|
</ul>
|
|
|
|
<h3><a name="background.what-is-apache" id="background.what-is-apache">What is Apache?</a></h3>
|
|
|
|
|
|
<p>The <a href="http://www.apache.org/">Apache Software Foundation</a>
|
|
provides organizational, legal, and financial support for a broad
|
|
range of open source software projects. The Foundation provides
|
|
an established framework for intellectual property and financial
|
|
contributions that simultaneously limits contributors potential
|
|
legal exposure. Through a collaborative and meritocratic
|
|
development process, Apache projects deliver enterprise-grade,
|
|
freely available software products that attract large communities
|
|
of users. The pragmatic Apache License makes it easy for all
|
|
users, commercial and individual, to deploy Apache products.</p>
|
|
|
|
<p>For more details about the Foundation, please see the <a href="http://www.apache.org/foundation/faq.html">Apache Software
|
|
Foundation FAQ</a></p>
|
|
|
|
<p>The Apache HTTP Server -- sometimes called Apache httpd -- is
|
|
a project of the Apache Software Foundation aimed at creating a
|
|
robust, commercial-grade, featureful, and freely-available
|
|
source code implementation of an HTTP (Web) server. For more
|
|
information, please see the <a href="http://httpd.apache.org/ABOUT_APACHE.html">About
|
|
Apache</a> page.</p>
|
|
|
|
|
|
|
|
<h3><a name="background.what-is-httpd" id="background.what-is-httpd">What is the Apache HTTP Server?</a></h3>
|
|
|
|
<ul>
|
|
<li>is a powerful, flexible, HTTP/1.1 compliant web server</li>
|
|
<li>implements the latest protocols, including HTTP/1.1 (RFC2616)</li>
|
|
<li>is highly configurable and extensible with third-party modules</li>
|
|
<li>can be customised by writing 'modules' using the Apache module
|
|
API</li>
|
|
<li>provides full source code and comes with an
|
|
<a href="http://www.apache.org/licenses/LICENSE-2.0">unrestrictive
|
|
license</a></li>
|
|
<li>runs on Windows 2003/XP/2000/NT/9x, Netware 5.x and above, OS/2,
|
|
and most versions of Unix, as well as several other operating
|
|
systems</li>
|
|
<li>is actively being developed</li>
|
|
<li>encourages user feedback through new ideas, bug reports and
|
|
patches</li>
|
|
</ul>
|
|
|
|
|
|
<h3><a name="background.tested" id="background.tested">How thoroughly tested is Apache?</a></h3>
|
|
|
|
<p>Apache is run on millions of Internet servers.
|
|
It has been tested thoroughly by both developers and users. The Apache
|
|
HTTP Server Project maintains rigorous standards before releasing new
|
|
versions of our server, and our server runs without a hitch on over
|
|
70% of all WWW servers available on the Internet. When bugs do show
|
|
up, we release patches and new versions as soon as they are
|
|
available.</p>
|
|
|
|
|
|
<h3><a name="background.logo" id="background.logo">May I use the Apache logo on my product or Web site?</a></h3>
|
|
|
|
<p>You may <em>NOT</em> use any original artwork from the Apache
|
|
Software Foundation, nor make or use modified versions of such
|
|
artwork, except under the following conditions:</p>
|
|
<ul>
|
|
<li>You may use the <a href="http://httpd.apache.org/apache_pb.gif">'Powered by Apache'
|
|
graphic</a> on a Web site that is being served by the Apache HTTP
|
|
server software.</li>
|
|
<li>You may use the aforementioned <a href="http://httpd.apache.org/apache_pb.gif">'Powered by Apache'
|
|
graphic</a> or the <a href="http://www.apache.org/images/asf_logo.gif">Apache Software
|
|
Foundation logo</a> in product description and promotional material
|
|
<em>IF and ONLY IF</em> such use can in no way be interpreted as
|
|
anything other than an attribution.</li>
|
|
</ul>
|
|
|
|
<div class="warning">Using the Apache name and artwork in a manner that
|
|
implies endorsement of a product or service is strictly
|
|
forbidden.</div>
|
|
|
|
|
|
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
|
<div class="section">
|
|
<h2><a name="support" id="support">Support</a></h2>
|
|
<ul>
|
|
<li><a href="#support.what2do">"Why can't I ...? Why won't ... work?" What
|
|
to do in case of problems</a></li>
|
|
|
|
<li><a href="#support.support">Whom do I contact for support?</a></li>
|
|
</ul>
|
|
|
|
<h3><a name="support.what2do" id="support.what2do">"Why can't I ...? Why won't ... work?" What to do in case of
|
|
problems</a></h3>
|
|
|
|
|
|
<p>If you are having trouble with your Apache server software, you should
|
|
take the following steps:</p>
|
|
|
|
<dl>
|
|
<dt>Check the ErrorLog!</dt>
|
|
<dd>Apache tries to be helpful when it encounters a problem. In many
|
|
cases, it will provide some details by writing one or more messages to the
|
|
server error log. Sometimes this is enough for you to diagnose & fix
|
|
the problem yourself (such as file permissions or the like). The default
|
|
location of the error log is
|
|
<code>/usr/local/apache2/logs/error_log</code>, but see the <code class="directive"><a href="../mod/core.html#errorlog">ErrorLog</a></code> directive in your config files for the
|
|
location on your server.</dd>
|
|
|
|
<dt>Check the ErrorLog again!</dt>
|
|
<dd>Nearly all problems can be solved by reading the error log.</dd>
|
|
|
|
<dt>Check the <a href="http://httpd.apache.org/docs/trunk/faq/">FAQ</a>!</dt>
|
|
<dd>The latest version of the Apache Frequently-Asked Questions list can
|
|
always be found at the main Apache web site.</dd>
|
|
|
|
<dt>Check the Apache bug database</dt>
|
|
<dd>Most problems that get reported to The Apache Group are recorded in
|
|
the <a href="http://httpd.apache.org/bug_report.html">bug database</a>.
|
|
<strong>Please</strong> check the existing reports, open
|
|
<strong>and</strong> closed, before adding one. If you find that your
|
|
issue has already been reported, please <em>don't</em> add a "me, too"
|
|
report. If the original report isn't closed yet, we suggest that you
|
|
check it periodically. You might also consider contacting the original
|
|
submitter, because there may be an email exchange going on about the
|
|
issue that isn't getting recorded in the database.</dd>
|
|
|
|
<dt><a id="support.what2do.user-support" name="support.what2do.user-support">Ask in a user support forum</a></dt>
|
|
<dd><p>Apache has an active community of users who are willing to share
|
|
their knowledge. Participating in this community is usually the best and
|
|
fastest way to get answers to your questions and problems.</p>
|
|
|
|
<p><a href="http://httpd.apache.org/userslist.html">Users
|
|
mailing list</a></p>
|
|
|
|
<p><a href="irc://irc.freenode.net/#apache">#apache</a> on
|
|
<a href="http://freenode.net">Freenode IRC</a> is also available for
|
|
user support issues.</p>
|
|
</dd>
|
|
|
|
<dt>Please use the bug database for bugs!</dt>
|
|
<dd><p>If you've gone through those steps above that are appropriate and
|
|
have obtained no relief, then please <em>do</em> let the httpd developers
|
|
know about the problem by <a href="http://httpd.apache.org/bug_report.html">logging a bug
|
|
report</a>.</p>
|
|
|
|
<p>If your problem involves the server crashing and generating a core
|
|
dump, please <a href="http://httpd.apache.org/dev/debugging.html">
|
|
include a backtrace</a> (if possible).</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
|
|
<h3><a name="support.support" id="support.support">Whom do I contact for support?</a></h3>
|
|
<p>With millions of users and fewer than sixty volunteer developers,
|
|
we cannot provide personal support for Apache. For free support, we
|
|
suggest participating in a <a href="#support.what2do.user-support">user forum</a>.</p>
|
|
|
|
<p>Professional, commercial support for Apache is available from
|
|
<a href="http://www.apache.org/info/support.cgi">a number of
|
|
companies</a>.</p>
|
|
|
|
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
|
<div class="section">
|
|
<h2><a name="error" id="error">Error Messages</a></h2>
|
|
<ul>
|
|
<li><a href="#error.sendfile">Invalid argument:
|
|
core_output_filter: writing data to the network</a></li>
|
|
<li><a href="#error.acceptex">AcceptEx failed</a></li>
|
|
<li><a href="#error.scriptheaders">Premature end of script
|
|
headers</a></li>
|
|
<li><a href="#error.permissiondenied">Permission denied</a></li>
|
|
</ul>
|
|
|
|
<h3><a name="error.sendfile" id="error.sendfile">Invalid argument:
|
|
core_output_filter: writing data to the network</a></h3>
|
|
|
|
<p>Apache uses the <code>sendfile</code> syscall on platforms
|
|
where it is available in order to speed sending of responses.
|
|
Unfortunately, on some systems, Apache will detect the presence of
|
|
<code>sendfile</code> at compile-time, even when it does not work
|
|
properly. This happens most frequently when using network or
|
|
other non-standard file-system.</p>
|
|
|
|
<p>Symptoms of this problem include the above message in the error
|
|
log and zero-length responses to non-zero-sized files. The
|
|
problem generally occurs only for static files, since dynamic
|
|
content usually does not make use of <code>sendfile</code>.</p>
|
|
|
|
<p>To fix this problem, simply use the <code class="directive"><a href="../mod/core.html#enablesendfile">EnableSendfile</a></code> directive to disable
|
|
<code>sendfile</code> for all or part of your server. Also see
|
|
the <code class="directive"><a href="../mod/core.html#enablemmap">EnableMMAP</a></code>, which can
|
|
help with similar problems.</p>
|
|
|
|
|
|
|
|
<h3><a name="error.acceptex" id="error.acceptex">AcceptEx Failed</a></h3>
|
|
|
|
<p>If you get error messages related to the <code>AcceptEx</code> syscall
|
|
on win32, see the <code class="directive"><a href="../mod/mpm_winnt.html#win32disableacceptex">Win32DisableAcceptEx</a></code>
|
|
directive.</p>
|
|
|
|
|
|
|
|
<h3><a name="error.scriptheaders" id="error.scriptheaders">Premature end of script
|
|
headers</a></h3>
|
|
|
|
<p>Most problems with CGI scripts result in this message written in the
|
|
error log together with an <code>Internal Server Error</code> delivered
|
|
to the browser. A guide to helping debug this type of problem is
|
|
available in the <a href="../howto/cgi.html#troubleshoot">CGI
|
|
tutorial</a>.</p>
|
|
|
|
|
|
<h3><a name="error.permissiondenied" id="error.permissiondenied">Permission denied</a></h3>
|
|
|
|
<p>A <code>Permission denied</code> error in the
|
|
<code>error_log</code>, accompanied by a <code>Forbidden</code>
|
|
message to the client usually indicates a problem with your
|
|
filesystem permissions, rather than a problem in the Apache HTTP
|
|
Server configuration files. Check to make sure that the
|
|
<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
|
|
has adequate permission to access the files in question. Also
|
|
check that the directory and all parent directories are at least
|
|
searchable for that user and group (i.e., <code>chmod
|
|
+x</code>).</p>
|
|
|
|
<p>Recent releases of Fedora Core and other Linux distributions
|
|
using SELinux have additional access restrictions beyond those
|
|
used by the basic filesystem. Violations of these restrictions
|
|
will also result in a <code>Permission denied</code> message. See
|
|
the <a href="http://fedora.redhat.com/docs/selinux-faq-fc3/">Fedora
|
|
SELinux FAQ</a> and <a href="http://fedora.redhat.com/docs/selinux-apache-fc3/">Apache
|
|
SELinux Policy Document</a>.</p>
|
|
|
|
|
|
|
|
</div></div>
|
|
<div class="bottomlang">
|
|
<p><span>Available Languages: </span><a href="../en/faq/all_in_one.html" title="English"> en </a> |
|
|
<a href="../ja/faq/all_in_one.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
|
|
<a href="../ko/faq/all_in_one.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
|
|
</div><div id="footer">
|
|
<p class="apache">Copyright 2006 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>
|
|
<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>
|
|
</body></html> |