Failed to execute CommandLineRunner

2017-12-07 19:55:10 ERROR o.s.boot.SpringApplication – Application startup failed
java.lang.IllegalStateException: Failed to execute CommandLineRunner
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:735)
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:716)
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:703)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:304)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
at ma.polytechnique.IFT2004W.TestSpringApplication.main(TestSpringApplication.java:39)
Caused by: java.lang.NullPointerException: null
at ma.polytechnique.IFT2004W.TestSpringApplication.run(TestSpringApplication.java:84)
at ma.polytechnique.IFT2004W.TestSpringApplication$$FastClassBySpringCGLIB$$139bd525.invoke()
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673)
at ma.polytechnique.IFT2004W.TestSpringApplication$$EnhancerBySpringCGLIB$$c4723f1a.run()
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:732)
… 6 common frames omitted