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| <title>Enable remote debugging</title><link rel="stylesheet" type="text/css" href="css/docbook.css"><meta name="generator" content="DocBook XSL-NS Stylesheets V1.76.1"><meta name="keywords" content="jetty, servlet, servlet-api, cometd, http, websocket, eclipse, maven, java, server, software"><link rel="home" href="index.html" title="Jetty : The Definitive Reference"><link rel="up" href="advanced-debugging.html" title="Chapter 25. Debugging"><link rel="prev" href="advanced-debugging.html" title="Chapter 25. Debugging"><link rel="next" href="debugging-with-eclipse.html" title="Debugging With Eclipse"><link xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" rel="shortcut icon" href="images/favicon.ico"><script type="text/javascript" src="js/shCore.js"></script><script type="text/javascript" src="js/shBrushJava.js"></script><script type="text/javascript" src="js/shBrushXml.js"></script><script type="text/javascript" src="js/shBrushBash.js"></script><script type="text/javascript" src="js/shBrushJScript.js"></script><script type="text/javascript" src="js/shBrushSql.js"></script><script type="text/javascript" src="js/shBrushProperties.js"></script><script type="text/javascript" src="js/shBrushPlain.js"></script><link type="text/css" rel="stylesheet" href="css/shCore.css"><link type="text/css" rel="stylesheet" href="css/shThemeEclipse.css"><link type="text/css" rel="stylesheet" href="css/font-awesome.min.css"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><tr><td style="width: 25%"><a href="http://www.eclipse.org/jetty"><img src="images/jetty-header-logo.png" alt="Jetty Logo"></a><br><span style="font-size: small"> |
| Version: 9.3.0.v20150612</span></td><td style="width: 50%"><script type="text/javascript"> (function() { |
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| <span class="website">www.webtide.com</span></a></h5><p> |
| private support for your internal/customer projects ... custom extensions and distributions ... versioned snapshots for indefinite support ... |
| scalability guidance for your apps and Ajax/Comet projects ... development services from 1 day to full product delivery |
| </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="enable-remote-debugging"></a>Enable remote debugging</h2></div></div></div><div class="toc"><dl><dt><span class="section"><a href="enable-remote-debugging.html#remote-debugging">Remote Debugging</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="remote-debugging"></a>Remote Debugging</h3></div></div></div><p> |
| If you have a web application deployed into Jetty you can interact with it remotely from a debugging |
| perspective easily. The basics are that you must start up the remote JVM with additional parameters and then |
| start up a remote debugging session in Eclipse for the webapp in question. This is easily accomplished. |
| </p><div xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title"><i class="icon-asterisk"></i> Note</h3><p> |
| This example assumes you are deploying your web application into the jetty-distribution. |
| </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="d0e19206"></a>Starting Jetty</h4></div></div></div><p> |
| Assuming you have your webapp deployed into jetty, there are two different ways to approach this: |
| </p><div class="variablelist"><dl><dt><span class="term">Via command line</span></dt><dd><p> |
| Add the required parameters on the commandline like so. |
| </p><div class="screenexample"><pre class="screen"> |
| |
| $ java -Xdebug -agentlib:jdwp=transport=dt_socket,address=9999,server=y,suspend=n -jar start.jar |
| |
| </pre></div></dd><dt><span class="term">Via |
| <code class="filename">start.ini</code> |
| </span></dt><dd><p> |
| This approach is best used if you want to debug a particular jetty-distribution and not have |
| to remember the commandline incantations. |
| </p><div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><p> |
| Edit the |
| <code class="filename">start.ini</code> |
| and uncomment the --exec line, this is required if you are adding jvm options to the |
| start.ini file as jetty-start must generate the classpath required and fork a new |
| jvm. |
| </p></li><li class="listitem"><p> |
| Add the parameters mentioned above in the Command Line option so your start.ini |
| looks like this: |
| </p><div class="informalexample"><script type="syntaxhighlighter" class="brush: plain;toolbar: false"> |
| <![CDATA[ |
| |
| #=========================================================== |
| # Configure JVM arguments. |
| # If JVM args are include in an ini file then --exec is needed |
| # to start a new JVM from start.jar with the extra args. |
| # If you wish to avoid an extra JVM running, place JVM args |
| # on the normal command line and do not use --exec |
| #----------------------------------------------------------- |
| --exec |
| -Xdebug |
| -agentlib:jdwp=transport=dt_socket,address=9999,server=y,suspend=n |
| # -Xmx2000m |
| # -Xmn512m |
| # -XX:+UseConcMarkSweepGC |
| # -XX:ParallelCMSThreads=2 |
| # -XX:+CMSClassUnloadingEnabled |
| # -XX:+UseCMSCompactAtFullCollection |
| # -XX:CMSInitiatingOccupancyFraction=80 |
| # -verbose:gc |
| # -XX:+PrintGCDateStamps |
| # -XX:+PrintGCTimeStamps |
| # -XX:+PrintGCDetails |
| # -XX:+PrintTenuringDistribution |
| # -XX:+PrintCommandLineFlags |
| # -XX:+DisableExplicitGC |
| |
| ]]> |
| </script></div><p> |
| Uncomment any other jvm environmental options you so desire for your debugging |
| session. |
| </p></li><li class="listitem"><p> |
| Regardless of the option chosen, you should see the following lines at the top of |
| your jetty-distribution startup. |
| </p><div class="informalexample"><script type="syntaxhighlighter" class="brush: plain;toolbar: false"> |
| <![CDATA[ |
| |
| Listening for transport dt_socket at address: 9999 |
| |
| ]]> |
| </script></div></li></ol></div></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a name="d0e19250"></a>Linking with your IDE</h4></div></div></div><p> |
| Refer to the documentation for your ide: |
| </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><a class="xref" href="debugging-with-eclipse.html" title="Debugging With Eclipse">Debugging With Eclipse</a></li><li class="listitem"><a class="xref" href="debugging-with-intellij.html" title="Debugging With IntelliJ">Debugging With IntelliJ</a></li></ul></div><p> |
| </p></div></div></div><script type="text/javascript"> |
| SyntaxHighlighter.all() |
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| See an error or something missing? |
| <span class="callout"><a href="http://github.com/jetty-project/jetty-documentation">Contribute to this documentation at |
| <span class="website"><i class="icon-github"></i> Github!</span></a></span><span style="float: right"><i>(Generated: 2015-06-15T13:18:46-05:00)</i></span></div></p><script xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" type="text/javascript"> |
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