explain

I found this error today, and then checked the code as a whole. I didn’t find any errors. Finally, I can’t just check it step by step.

solve

Determine if there is a problem with the POM file

As shown in the figure above, there is a red wavy line, which represents an error. Please check and solve it. Whether the versions conflict. It is best to delete unnecessary dependencies first.

Determine if there is a problem with the YML file

Whether there is a red wavy line in the YML file and whether there is a problem with the YML syntax. Similarly, delete unnecessary configurations

Clear the cache of idea

After clearing the cache, manually delete the target folder

As above, re run the project

summary

Finally, I found that the problem is the cache problem of idea. After deleting unnecessary configurations, manually delete the tartset directory and restart the operation. It’s OK.