In Window -> Preferences -> Validation, uncheck JPA Validator in the "Build" column (leave it checked in the "Manual" column). This should save some time for JPA validation. You can stop JPA build completely by removing the JPA project facet from the project, but I wouldn't recommend that as I don't know how it will affect other parts of the project build.

ajoshi6 wrote:

thank you professor,

 

but the Manual and Build are both unchecked in the Validation, but still its starting JPA build

Like I said, you can stop JPA build completely by removing the JPA project facet (right click on the project, select Properties -> Project Facets and uncheck JPA there), but I don't know how it affects the overall project build so do it at your own risk.