| <html><head><META http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Chapter 11. Serviceability and Diagnostics</title><meta content="DocBook XSL Stylesheets V1.76.0" name="generator"><link rel="home" href="index.html" title="Virgo User Guide"><link rel="up" href="index.html" title="Virgo User Guide"><link rel="prev" href="ch10s03.html" title="Configuring the Repository"><link rel="next" href="ch11s02.html" title="(Trace) Logging"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table summary="Navigation header" width="100%"><tr><td align="left" width="20%"><a accesskey="p" href="ch10s03.html">Prev</a> </td><th align="center" width="60%"> </th><td align="right" width="20%"> <a accesskey="n" href="ch11s02.html">Next</a></td></tr></table><hr></div><div class="chapter" title="Chapter 11. Serviceability and Diagnostics"><div class="titlepage"><div><div><h2 class="title"><a name="serviceability"></a>Chapter 11. Serviceability and Diagnostics</h2></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="section"><a href="ch11.html#serviceability-info-log">Event Logging</a></span></dt><dt><span class="section"><a href="ch11s02.html">(Trace) Logging</a></span></dt><dd><dl><dt><span class="section"><a href="ch11s02.html#serviceability-info-trace-app">Application Output</a></span></dt></dl></dd><dt><span class="section"><a href="ch11s03.html">Service Dumps</a></span></dt></dl></div><p> |
| Virgo supports two kinds of logging: <span class="emphasis"><em>Event Logging</em></span> and <span class="emphasis"><em>Trace logging</em></span> which is usually referred |
| to simply as <span class="emphasis"><em>Logging</em></span>. The difference between Event Logging and Logging is explained below, but both are configured in the |
| <code class="literal">serviceability.xml</code> file in the <code class="literal">configuration</code> directory. This file takes the form of a Logback configuration, Virgo |
| uses a Logback implementation behind the SLF4J logging interface. |
| </p><p> |
| For a description of the syntax and facilities provided by <code class="literal">serviceability.xml</code> |
| see the <span class="emphasis"><em>Logback</em></span> documentation (referenced in <a class="xref" href="apc.html" title="Appendix C. Further Reading">Appendix C. <i> |
| Further Reading |
| </i></a>). |
| </p><p> |
| </p><div class="section" title="Event Logging"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="serviceability-info-log"></a>Event Logging</h2></div></div></div><p> |
| Event logging records important events in Virgo. Each event is logged to |
| an event log file and is accompanied by a code enclosed in angle brackets. |
| An example is shown below: |
| </p><pre class="screen"> |
| [2010-10-25 16:20:45.897] system-artifacts <TC0010I> Creating HTTP/1.1 connector with scheme http on port 8080. |
| </pre><p> |
| (For a description of the log code syntax, see <a class="xref" href="apa.html" title="Appendix A. Event log codes">Appendix A. <i>Event log codes</i></a>.) |
| The format of event log messages is fully configurable. |
| </p><p> |
| By default, event log messages are stored in <code class="literal">$SERVER_HOME/serviceability/eventlogs/eventlog.log</code>. |
| </p><p> |
| The default behaviour is that, once <code class="literal">eventlog.log</code> reaches a 10Mb limit, it rolls into a series of files named |
| <code class="literal">eventlog_</code><span class="emphasis"><em>i</em></span><code class="literal">.log</code> where <span class="emphasis"><em>i</em></span> ranges from 1 to 4, and event logging continues in |
| a new <code class="literal">eventlog.log</code> file. |
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