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. A ServletContext is required to configure default servlet handling
  2. [Assertion failed] - this argument is required; it must not be null
  3. Cannot load an ApplicationContext with a NULL 'contextLoader'. Consider annotating your test class with @ContextConfiguration or @ContextHierarchy.
  4. Class must not be null
  5. WebApplicationContext is required
  6. PersistentEntity must not be null!
  7. @EnableAsync annotation metadata was not injected
  8. ResourceLoader must not be null
  9. Target object must not be null
  10. URI must not be null

Specific cases

External results for this pattern (521)

  1. ResourceLoader must not be null
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  2. No InputStream specified
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  3. khotynvia GitHub5 days ago
    [Assertion failed] - this argument is required; it must not be null
    Show stack trace
  4. fixakovia GitHub1 week ago
    Unable to find the main class to restart
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  5. No id property found for class com.raj.standaloneelasticexample.model.Employee!
    Show stack trace
  6. Listener not registered: org.springframework.amqp.rabbit.core.RabbitTemplate@42802df2 []
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  7. maheshvia Stack Overflow1 week ago
    No auto-configuration attributes found. Is com.Application annotated with EnableAutoConfiguration?
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  8. mouezavia GitHub2 weeks ago
    @EnableAsync annotation metadata was not injected
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