我在jetty服务器上使用ANT编译新的。war文件时也遇到了同样的问题。在你必须像之前写的那样设置Java compiler之后，你应该创建相同版本的jdk/jre编译器和构建路径(例如jdk 1.6v33, jdk 1.7， ....)。

我什么都做了，还是没工作。解决方案是删除已编译的.class文件和生成的war文件的目标，现在它的工作:)

我有同样的错误与JBoss 7.1.. 我和泽菲罗做了同样的事。只是忽略了错误，我能够正常放置断点。 在我的情况下，我正在构建思想蚂蚁生成器，这是我的javac任务:

<javac
        srcdir="${src.dir}"
        destdir="${build.classes.dir}" 
        includeantruntime="false" 
        debug="${debug}"
        verbose="false"
        debuglevel="lines,vars,source"
        source="1.6"
        target="1.6">

        <!-- Sppressing warning for setting an older source without bootclasspath
             (see: https://blogs.oracle.com/darcy/entry/bootclasspath_older_source) -->
        <compilerarg value="-Xlint:-options"/>

        <classpath>
            <fileset dir="${lib.dir}" includes="*.jar" />
            <fileset dir="${jboss.lib.dir}" includes="**/*.jar" />
        </classpath>

    </javac>

检查/做以下事情:

1)在“窗口—>首选项—> Java—>编译器—>类文件生成”下，所有选项必须为True:

(1) Add variable attributes...
(2) Add line number attributes...
(3) Add source file name...
(4) Preserve unused (never read) local variables

2)在项目的.settings文件夹中，找到一个名为org.eclipse.jdt.core.prefs的文件。 验证或设置org.eclipse.jdt.core.compiler.debug.lineNumber=generate

3)如果仍然出现错误窗口，单击复选框不显示错误信息。

4)清洁和建造项目。开始调试。

正常情况下，错误窗口不再显示，调试信息显示正确。

有一次我在使用junit和Mockito时遇到了同样的错误，我忘记为静态类添加@PrepareForTest。

添加以下代码修复了我的问题。

@PrepareForTest({XXXXX.class})

不确定是不是同一个案子。

If someone is trying to debug Java's source code, then, this is the only solution that worked for me. Most of the above answers talk about setting the Compiler option to generate line numbers.But, if want to debug Java's source code (say java.util.HashMap), then the above options may not work for you. This is because , the project from where you intend to debug the source code is having the Java Build Path --> Library --> JRE System Library pointing to the jre jar instead of the jdk jar. The classes bundled inside jre jar have already been pre-compiled with a specific option, that will not honor the Compiler option settings. Solution, is to reconfigure your project to have the JRE System Library point to the jdk jar. The classes inside your jdk jar will honour the Compiler option settings. So, once you update your project's JRE System Library to point to the jdk jar, debug on Java source code will start working.

We have very useful information to solve this problem already, but in my specific case, the problem was that as I did an update to my project from the repository, new classes were generated with the compiled source from the newest code. The problem is that I forgot to change the versions of the projects in my POM files and as the breakpoints were set on the new code and the POM files were still pointing to old versions that were available on the JAR files of a previous compilation, the classes from the JAR files were chosen and not the classes from the new code.

在恢复中，为了解决这个问题，我只需要更新主项目的POM文件的版本，清理并重新编译源代码，最后刷新环境。我希望这能对其他人有用。