1. Background description

Project background: IDEA (2020.3)+Springboot (2.1.5. RELEASE) + maven

Error content: java: Internal error in the mapping processor: java.lang.NullPointerException

2. Error cause

The cause of the error has not been found

3. Solutions

When using mapstruct, IDEA version 2020.3 gives an error when building the project: java: Internal error in the mapping processor: java.lang.NullPointerException

Solution: Modify editor configuration

Path: Setting —> Build,Execution,Deployment –> Compiler –> User-local build process VM options (overrides Shared options)

Configuration content: – Djps.track.ap dependencies=false

As shown in the figure below:

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