Assert.notNull() has thrown an IllegalArgumentException

java.lang.IllegalArgumentException
Javadoc
Thrown to indicate that a method has been passed an illegal or inappropriate argument. @author unascribed @since JDK1.0
at org.springframework.util.Assert.notNull
(source)

Typical Exception Messages

  1. [Assertion failed] - this argument is required; it must not be null
  2. A ServletContext is required to configure default servlet handling
  3. Name for argument type [java.lang.String] not available, and parameter name information not found in class file either.
  4. Cannot load an ApplicationContext with a NULL 'contextLoader'. Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.
  5. WebApplicationContext is required
  6. Class must not be null
  7. Target object must not be null
  8. @EnableAsync annotation metadata was not injected
  9. PersistentEntity must not be null!
  10. ResourceLoader must not be null

Specific cases

External results for this pattern (467)

  1. sklagesvia GitHub2 days ago
    Target object must not be null
    Show stack trace
  2. Property is null.
    Show stack trace
  3. Cannot load an ApplicationContext with a NULL 'contextLoader'. Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.
    Show stack trace
  4. aknonvia Stack Overflow2 weeks ago
    A ServletContext is required to configure default servlet handling
    Show stack trace
  5. craigmccartervia GitHub2 weeks ago
    Source must not be null
    Show stack trace
  6. ashutoshbajpaivia GitHub2 weeks ago
    Source must not be null
    Show stack trace
  7. Davidevia Stack Overflow2 weeks ago
    username cannot be null
    Show stack trace