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。

这解决了我的问题:

窗口->首选项->服务器->运行时环境 Apache Tomcat ->编辑 选择JDK而不是JRE

我尝试了之前的大部分解决方案，但还是遇到了问题。 这就是我接下来所做的:

从Eclipse中删除应用程序 停止服务器 从webapps中删除应用文件夹 从服务器中的临时文件夹中删除内容 从服务器中的工作文件夹中删除内容 在Eclipse上重新打开应用程序 启动服务器

可能有些步骤是不需要的，但“以防万一”。

因此，如果前面的解决方案仍然不适合你。试试这个。 我希望这对你有所帮助;-)

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。

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。