Log4j的Unknown Source问题

来源：互联网发布：抽象主义知乎编辑：程序博客网时间：2024/06/05 01:43

通过笔者在网上查了一下，可能是因为在类编译的时候没有将debug设置为true所导致的。网络原文如下（摘自Sun的SDN论坛）：
This seems to be related to how you compile your classes. In the javac task of my ant script for example, I must specify debug="true" if I want Tomcat to show line numbers in a stack trace:
<javac srcdir="${src.home}"
    destdir="${build.home}/WEB-INF/classes"
    source="1.4"
    target="1.4"
    debug="on"
    deprecation="false"
    optimize="true"
    excludes="test/**">
    <classpath refid="compile.classpath"/>
</javac>

网络中的另一回答：
Zoe, luckily this should be fairly easy to fix. It looks like you are using Ant to build/package your project. You want to double check and make sure your <javac> task is setting the debug property to on AND including the 3 debuglevel arguments to provide full debugging information in your generated classes, so you don't get any of that 'unknown source' stuff going on.

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