Source not found problem when debugging code in Eclipse debug breakpoint

Sometimes this happens when you debug your code, but you don't have to pay any attention to it, so get a little bit of information about it today:

1. Jump to the code does not have the source, download source after the selection of source location will be normal display source code.

2. The source code and class file are inconsistent. Even if the Auto build option is checked, Eclipse still has a case where the class does not compile in real time, resulting in the inconsistency between our current code and the compiled class file. Cause the Debug breakpoint to locate the source code fails. Just rebuild or clean the package.

Source not found problem when debugging code in Eclipse debug breakpoint