Spring Boot: Errors & Solutions

• Error: java.lang.ClassNotFoundException: ch.qos.logback.classic.joran.JoranConfigurator

  When: During Application Launch

  Solution: Clear Maven cache

    First save and close Spring STS.
  
    In Linux Maven cache folder is located in ~/.m2/repository/. Delete all files inside it.
  
    Start Spring STS. It will download all Maven dependenices. It will takes sometime.
  
    Run app. Hopefully it should start normally.

• Error: com.fasterxml.jackson.databind.JsonMappingException

  When: Error received in response to a POST request

  Solution: Always include a no-arguments constructor in Model POJO class

• Error creating bean with name ‘entityManagerFactory’

  When: During Application Launch

  Solution: Remove and database keywords from Model class

    When using database with Spring app, always ensure that Model POJO class name and it’s member field names are not database Rerserve/Keywords.

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