diff options
| author | Joe Orton <jorton@apache.org> | 2020-08-19 09:31:23 +0200 |
|---|---|---|
| committer | Joe Orton <jorton@apache.org> | 2020-08-19 09:31:23 +0200 |
| commit | 7f6aec2cf7fb0caaa93dc98e25968d58b60107fd (patch) | |
| tree | 2218e4fdf202d9781910e0218b690acbdc92a0d5 /docs/manual/stopping.html.en | |
| parent | Follow up to r1880368 by adjusting en.xml to match lang-targets.xml. (diff) | |
| download | apache2-7f6aec2cf7fb0caaa93dc98e25968d58b60107fd.tar.xz apache2-7f6aec2cf7fb0caaa93dc98e25968d58b60107fd.zip | |
Follow up to r1880368 and r1880980:
Complete move to .en.utf8 suffixes in two steps:
1. From fresh checkout, renamed all existing files:
$ for f in *.html.en */*.html.en; do svn mv $f $f.utf8; done
2. Ran "./build.sh all" which also regenerates the typemaps.
[skip ci]
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1880982 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'docs/manual/stopping.html.en')
| -rw-r--r-- | docs/manual/stopping.html.en | 264 |
1 files changed, 0 insertions, 264 deletions
diff --git a/docs/manual/stopping.html.en b/docs/manual/stopping.html.en deleted file mode 100644 index 6ff9a9f0e2..0000000000 --- a/docs/manual/stopping.html.en +++ /dev/null @@ -1,264 +0,0 @@ -<?xml version="1.0" encoding="UTF-8"?> -<!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> -<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> -<!-- - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - This file is generated from xml source: DO NOT EDIT - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - --> -<title>Stopping and Restarting Apache HTTP Server - Apache HTTP Server Version 2.5</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 rel="stylesheet" type="text/css" href="./style/css/prettify.css" /> -<script src="./style/scripts/prettify.min.js" type="text/javascript"> -</script> - -<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/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p> -<p class="apache">Apache HTTP Server Version 2.5</p> -<img alt="" src="./images/feather.png" /></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 2.5</a></div><div id="page-content"><div id="preamble"><h1>Stopping and Restarting Apache HTTP Server</h1> -<div class="toplang"> -<p><span>Available Languages: </span><a href="./de/stopping.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | -<a href="./en/stopping.html" title="English"> en </a> | -<a href="./es/stopping.html" hreflang="es" rel="alternate" title="Español"> es </a> | -<a href="./fr/stopping.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | -<a href="./ja/stopping.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | -<a href="./ko/stopping.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | -<a href="./tr/stopping.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> -</div> - - <p>This document covers stopping and restarting Apache HTTP Server on - Unix-like systems. Windows NT, 2000 and XP users should see - <a href="platform/windows.html#winsvc">Running httpd as a - Service</a> and Windows 9x and ME users should see <a href="platform/windows.html#wincons">Running httpd as a - Console Application</a> for information on how to control - httpd on those platforms.</p> -</div> -<div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#introduction">Introduction</a></li> -<li><img alt="" src="./images/down.gif" /> <a href="#term">Stop Now</a></li> -<li><img alt="" src="./images/down.gif" /> <a href="#graceful">Graceful Restart</a></li> -<li><img alt="" src="./images/down.gif" /> <a href="#hup">Restart Now</a></li> -<li><img alt="" src="./images/down.gif" /> <a href="#gracefulstop">Graceful Stop</a></li> -</ul><h3>See also</h3><ul class="seealso"><li><code class="program"><a href="./programs/httpd.html">httpd</a></code></li><li><code class="program"><a href="./programs/apachectl.html">apachectl</a></code></li><li><a href="invoking.html">Starting</a></li><li><a href="#comments_section">Comments</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 name="introduction" id="introduction">Introduction</a> <a title="Permanent link" href="#introduction" class="permalink">¶</a></h2> - - <p>In order to stop or restart the Apache HTTP Server, you must send a signal to - the running <code class="program"><a href="./programs/httpd.html">httpd</a></code> processes. There are two ways to - send the signals. First, you can use the unix <code>kill</code> - command to directly send signals to the processes. You will - notice many <code class="program"><a href="./programs/httpd.html">httpd</a></code> executables running on your system, - but you should not send signals to any of them except the parent, - whose pid is in the <code class="directive"><a href="./mod/mpm_common.html#pidfile">PidFile</a></code>. That is to say you - shouldn't ever need to send signals to any process except the - parent. There are four signals that you can send the parent: - <code><a href="#term">TERM</a></code>, - <code><a href="#graceful">USR1</a></code>, - <code><a href="#hup">HUP</a></code>, and - <code><a href="#gracefulstop">WINCH</a></code>, which - will be described in a moment.</p> - - <p>To send a signal to the parent you should issue a command - such as:</p> - -<div class="example"><p><code>kill -TERM `cat /usr/local/apache2/logs/httpd.pid`</code></p></div> - - <p>The second method of signaling the <code class="program"><a href="./programs/httpd.html">httpd</a></code> processes - is to use the <code>-k</code> command line options: <code>stop</code>, - <code>restart</code>, <code>graceful</code> and <code>graceful-stop</code>, - as described below. These are arguments to the <code class="program"><a href="./programs/httpd.html">httpd</a></code> binary, but we recommend that - you send them using the <code class="program"><a href="./programs/apachectl.html">apachectl</a></code> control script, which - will pass them through to <code class="program"><a href="./programs/httpd.html">httpd</a></code>.</p> - - <p>After you have signaled <code class="program"><a href="./programs/httpd.html">httpd</a></code>, you can read about - its progress by issuing:</p> - -<div class="example"><p><code>tail -f /usr/local/apache2/logs/error_log</code></p></div> - - <p>Modify those examples to match your <code class="directive"><a href="./mod/core.html#serverroot">ServerRoot</a></code> and <code class="directive"><a href="./mod/mpm_common.html#pidfile">PidFile</a></code> settings.</p> -</div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> -<div class="section"> -<h2><a name="term" id="term">Stop Now</a> <a title="Permanent link" href="#term" class="permalink">¶</a></h2> - -<dl><dt>Signal: TERM</dt> -<dd><code>apachectl -k stop</code></dd> -</dl> - - <p>Sending the <code>TERM</code> or <code>stop</code> signal to - the parent causes it to immediately attempt to kill off all of its - children. It may take it several seconds to complete killing off - its children. Then the parent itself exits. Any requests in - progress are terminated, and no further requests are served.</p> -</div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> -<div class="section"> -<h2><a name="graceful" id="graceful">Graceful Restart</a> <a title="Permanent link" href="#graceful" class="permalink">¶</a></h2> - -<dl><dt>Signal: USR1</dt> -<dd><code>apachectl -k graceful</code></dd> -</dl> - - <p>The <code>USR1</code> or <code>graceful</code> signal causes - the parent process to <em>advise</em> the children to exit after - their current request (or to exit immediately if they're not - serving anything). The parent re-reads its configuration files and - re-opens its log files. As each child dies off the parent replaces - it with a child from the new <em>generation</em> of the - configuration, which begins serving new requests immediately.</p> - - <p>This code is designed to always respect the process control - directive of the MPMs, so the number of processes and threads - available to serve clients will be maintained at the appropriate - values throughout the restart process. Furthermore, it respects - <code class="directive"><a href="./mod/mpm_common.html#startservers">StartServers</a></code> in the - following manner: if after one second at least <code class="directive"><a href="./mod/mpm_common.html#startservers">StartServers</a></code> new children have not - been created, then create enough to pick up the slack. Hence the - code tries to maintain both the number of children appropriate for - the current load on the server, and respect your wishes with the - <code class="directive"><a href="./mod/mpm_common.html#startservers">StartServers</a></code> - parameter.</p> - - <p>Users of <code class="module"><a href="./mod/mod_status.html">mod_status</a></code> - will notice that the server statistics are <strong>not</strong> - set to zero when a <code>USR1</code> is sent. The code was - written to both minimize the time in which the server is unable - to serve new requests (they will be queued up by the operating - system, so they're not lost in any event) and to respect your - tuning parameters. In order to do this it has to keep the - <em>scoreboard</em> used to keep track of all children across - generations.</p> - - <p>The status module will also use a <code>G</code> to indicate - those children which are still serving requests started before - the graceful restart was given.</p> - - <p>At present there is no way for a log rotation script using - <code>USR1</code> to know for certain that all children writing - the pre-restart log have finished. We suggest that you use a - suitable delay after sending the <code>USR1</code> signal - before you do anything with the old log. For example if most of - your hits take less than 10 minutes to complete for users on - low bandwidth links then you could wait 15 minutes before doing - anything with the old log.</p> - - <div class="note"> - <p>When you issue a restart, a syntax check is first run, to - ensure that there are no errors in the configuration files. - If your configuration file has errors in it, you will get an - error message about that syntax error, and the server will refuse to - restart. This avoids the situation where the server halts and then - cannot restart, leaving you with a non-functioning server.</p> - - <p>This still will not - guarantee that the server will restart correctly. To check the - semantics of the configuration files as well as the syntax, you - can try starting <code class="program"><a href="./programs/httpd.html">httpd</a></code> as a non-root user. If there - are no errors it will attempt to open its sockets and logs and fail - because it's not root (or because the currently running - <code class="program"><a href="./programs/httpd.html">httpd</a></code> already has those ports bound). If it fails - for any other reason then it's probably a config file error and the error - should be fixed before issuing the graceful restart.</p></div> -</div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> -<div class="section"> -<h2><a name="hup" id="hup">Restart Now</a> <a title="Permanent link" href="#hup" class="permalink">¶</a></h2> - -<dl><dt>Signal: HUP</dt> -<dd><code>apachectl -k restart</code></dd> -</dl> - - <p>Sending the <code>HUP</code> or <code>restart</code> signal to - the parent causes it to kill off its children like in - <code>TERM</code>, but the parent doesn't exit. It re-reads its - configuration files, and re-opens any log files. Then it spawns a - new set of children and continues serving hits.</p> - - <p>Users of <code class="module"><a href="./mod/mod_status.html">mod_status</a></code> - will notice that the server statistics are set to zero when a - <code>HUP</code> is sent.</p> - -<div class="note">As with a graceful restart, a syntax check is run before the -restart is attempted. If your configuration file has errors in it, the -restart will not be attempted, and you will receive notification of the -syntax error(s).</div> -</div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> -<div class="section"> -<h2><a name="gracefulstop" id="gracefulstop">Graceful Stop</a> <a title="Permanent link" href="#gracefulstop" class="permalink">¶</a></h2> - -<dl><dt>Signal: WINCH</dt> -<dd><code>apachectl -k graceful-stop</code></dd> -</dl> - - <p>The <code>WINCH</code> or <code>graceful-stop</code> signal causes - the parent process to <em>advise</em> the children to exit after - their current request (or to exit immediately if they're not - serving anything). The parent will then remove its <code class="directive"><a href="./mod/mpm_common.html#pidfile">PidFile</a></code> and cease listening on - all ports. The parent will continue to run, and monitor children - which are handling requests. Once all children have finalised - and exited or the timeout specified by the <code class="directive"><a href="./mod/mpm_common.html#gracefulshutdowntimeout">GracefulShutdownTimeout</a></code> has been - reached, the parent will also exit. If the timeout is reached, - any remaining children will be sent the <code>TERM</code> signal - to force them to exit.</p> - - <p>A <code>TERM</code> signal will immediately terminate the - parent process and all children when in the "graceful" state. However - as the <code class="directive"><a href="./mod/mpm_common.html#pidfile">PidFile</a></code> will - have been removed, you will not be able to use - <code>apachectl</code> or <code>httpd</code> to send this signal.</p> - - <div class="note"><p>The <code>graceful-stop</code> signal allows you to run multiple - identically configured instances of <code class="program"><a href="./programs/httpd.html">httpd</a></code> at the - same time. This is a powerful feature when performing graceful - upgrades of httpd, however it can also cause deadlocks and race - conditions with some configurations.</p> - - <p>Care has been taken to ensure that on-disk files such as lock files - (<code class="directive"><a href="./mod/core.html#mutex">Mutex</a></code>) and Unix socket files - (<code class="directive"><a href="./mod/mod_cgid.html#scriptsock">ScriptSock</a></code>) contain the server - PID, and should coexist without problem. However, if a configuration - directive, third-party module or persistent CGI utilises any other on-disk - lock or state files, care should be taken to ensure that multiple running - instances of <code class="program"><a href="./programs/httpd.html">httpd</a></code> do not clobber each other's files.</p> - - <p>You should also be wary of other potential race conditions, such as - using <code class="program"><a href="./programs/rotatelogs.html">rotatelogs</a></code> style piped logging. Multiple running - instances of <code class="program"><a href="./programs/rotatelogs.html">rotatelogs</a></code> attempting to rotate the same - logfiles at the same time may destroy each other's logfiles.</p></div> -</div></div> -<div class="bottomlang"> -<p><span>Available Languages: </span><a href="./de/stopping.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | -<a href="./en/stopping.html" title="English"> en </a> | -<a href="./es/stopping.html" hreflang="es" rel="alternate" title="Español"> es </a> | -<a href="./fr/stopping.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | -<a href="./ja/stopping.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | -<a href="./ko/stopping.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | -<a href="./tr/stopping.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> -</div><div class="top"><a href="#page-header"><img src="./images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div> -<script type="text/javascript"><!--//--><![CDATA[//><!-- -var comments_shortname = 'httpd'; -var comments_identifier = 'http://httpd.apache.org/docs/trunk/stopping.html'; -(function(w, d) { - if (w.location.hostname.toLowerCase() == "httpd.apache.org") { - d.write('<div id="comments_thread"><\/div>'); - var s = d.createElement('script'); - s.type = 'text/javascript'; - s.async = true; - s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; - (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); - } - else { - d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); - } -})(window, document); -//--><!]]></script></div><div id="footer"> -<p class="apache">Copyright 2020 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/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- -if (typeof(prettyPrint) !== 'undefined') { - prettyPrint(); -} -//--><!]]></script> -</body></html>
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