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| 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">config</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" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="serviceability-info-log"></a>9.1 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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