我的问题是我有2个JAR，我试图根据Eclipse中的Java Build Path => order & Export选项卡中的顺序覆盖另一个JAR，因为一个是用于调试的，另一个不是(调试JAR在顺序中是第一个)。当我这样做时，我必须手动附加一个源。

我尝试删除非调试JAR，并将调试JAR放在我的\WEB-INF\lib\目录中，进行清理、构建等操作，结果成功了。这一次(已经删除了附加的源代码)，它将自动让我浏览调试代码，而无需手动附加任何源代码。断点和调试也可以工作。

为了防止有人仍然有问题，我也尝试了其他答案中提到的所有这些特解:

取消选中，应用并重新选中添加行号属性… 手动编辑org.eclipse.jdt.core.prefs，如另一个答案:https://stackoverflow.com/a/31588700/1599699中提到的 确保在启用调试的情况下生成JAR。 将JDK遵从级别从1.6更改为1.7(从而匹配我正在使用的JDK)。

我还做了通常的服务器关闭(并确保java.exe实际上是关闭的……)，删除两个项目中的\build\目录，使用-clean参数重新启动Eclipse，重新创建调试JAR，刷新，清洗，并在其中构建带有调试JAR的项目，以调试模式启动服务器，发布/清洗，并设置断点。

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>

从Spring AOP得到这个消息(似乎来自CGLIB库)。点击忽略似乎工作正常，我仍然可以调试。

这里有详细的解释:

https://github.com/spring-projects/spring-ide/issues/78

只是为了将来参考，这是答案的相关部分(忽略引用Spring Boot应用程序的事实，在许多其他情况下行为是相同的):

Whenever you set a breakpoint in Eclipse/STS, the IDE tries to set the breakpoint in the VM if you launch an app. That is what happens in your case when you run the boot app in debug mode. For each class that gets loaded into the JVM, the IDE checks whether it needs to set a breakpoint or not. If it decides to set the breakpoint, the tries to do so (using the information from the breakpoint definition in the IDE, including its line number, since you usually set line breakpoints on a source file at a given line). This decision (whether to set the breakpoint on a given loaded class or not) checks the types that you set the breakpoint on, enclosing types, and inner classes. This makes sure that breakpoints for inner classes (even anonymous inner classes) are set to the JVM (and are not ignored). Spring Boot generates an inner class for your controller at runtime (this is the CGLIB generated inner class that appears in the error message). When the JVM loads that class, it tries to set the line number breakpoint of the enclosing type (for this inner class). Since the generated inner class doesn't have any line number information (it doesn't need to have line number information), setting the breakpoint fails for this inner class with the mentioned error message. When the IDE loads the enclosing type (your controller class itself), it also tries to set the line breakpoint and succeeds with that. This is visualized with the check marker on the breakpoint marker. Therefore you can safely ignore the error message that shows up. To avoid this error message to show up, you can go to the preferences (Java -> Debug) and disable "Warn when unable to install breakpoint due to missing line number attributes".

我在Eclipse IDE中也有同样的错误。 但这似乎是一个可以忽略的错误。 我在错误对话框上按下Ok键，然后继续。 我的断点到达&我能够进一步调试。

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:)