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| <title>Frequently Asked Questions - Apache HTTP Server</title> |
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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> |
| <p class="apache">Apache HTTP Server Version 2.0</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 2.0</a> > <a href="./">FAQ</a></div><div id="page-content"><div class="retired"><h4>Please note</h4> |
| <p>This document refers to the <strong>2.0</strong> version of Apache httpd, which <strong>is no longer maintained</strong>. Upgrade, and refer to the current version of httpd instead, documented at:</p> |
| <ul><li><a href="http://httpd.apache.org/docs/current/">Current release version of Apache HTTP Server documentation</a></li></ul></div><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="../ko/faq/all_in_one.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | |
| <a href="../tr/faq/all_in_one.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </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/2.0/faq/">http://httpd.apache.org/docs/2.0/faq/</a>>.</p> |
| |
| <p>Since Apache 2.0 is quite new, we don't yet know what the <em>Frequently |
| Asked Questions</em> will be. While this section fills up, you should 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="#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="#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="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 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 <a href="http://httpd.apache.org/docs/2.0/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.libera.chat/#httpd">#httpd</a> on |
| <a href="http://libera.chat">Libera.chat IRC</a> is available for |
| user support issues.</p> |
| |
| <p>USENET newsgroups:</p> |
| |
| <ul> |
| <li>comp.infosystems.www.servers.unix |
| [<a href="news:comp.infosystems.www.servers.unix">news</a>] |
| [<a href="http://groups.google.com/groups?group=comp.infosystems.www.servers.unix">google</a>] |
| </li> |
| |
| <li>comp.infosystems.www.servers.ms-windows |
| [<a href="news:comp.infosystems.www.servers.ms-windows">news</a>] |
| [<a href="http://groups.google.com/groups?group=comp.infosystems.www.servers.ms-windows">google</a>] |
| </li> |
| |
| <li>comp.infosystems.www.authoring.cgi |
| [<a href="news:comp.infosystems.www.authoring.cgi">news</a>] |
| [<a href="http://groups.google.com/groups?group=comp.infosystems.www.authoring.cgi">google</a>] |
| </li> |
| </ul></dd> |
| |
| <dt>If all else fails, report the problem in the bug database</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 include a backtrace (if possible). As an example,</p> |
| |
| <div class="example"><p><code> |
| # cd <var>ServerRoot</var><br /> |
| # dbx <var>httpd</var> <var>core</var><br /> |
| (dbx) where |
| </code></p></div> |
| |
| <p>(Substitute the appropriate locations for your <var>ServerRoot</var> |
| and your <var>httpd</var> and <var>core</var> files. You may have to use |
| <code>gdb</code> instead of <code>dbx</code>.)</p> |
| </dd> |
| </dl> |
| |
| |
| <h3><a name="support.support" id="support.support">Whom do I contact for support?</a></h3> |
| <p>With several million users and fewer than forty 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> |
| |
| |
| </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> |
| </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> |
| |
| |
| </div></div> |
| <div class="bottomlang"> |
| <p><span>Available Languages: </span><a href="../en/faq/all_in_one.html" title="English"> en </a> | |
| <a href="../ko/faq/all_in_one.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | |
| <a href="../tr/faq/all_in_one.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> |
| </div><div id="footer"> |
| <p class="apache">Copyright 2013 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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