java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory

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org/slf4j/ LoggerFactory
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org/slf4j/ LoggerFactory
java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.hibernate.validator.util.LoggerFactory.make(LoggerFactory.java:29)
at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:269)
at org.hibernate.cfg.beanvalidation.TypeSafeActivator.getValidatorFactory(TypeSafeActivator.java:461)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)

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