java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null

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    java.lang.IllegalArgumentException: [Assertion failed] - this argument is required; it must not be null

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Root Cause Analysis

  1. java.lang.IllegalArgumentException

    [Assertion failed] - this argument is required; it must not be null

    at org.springframework.util.Assert.notNull()
  2. Spring Core
    Assert.notNull
    1. org.springframework.util.Assert.notNull(Assert.java:112)
    2. org.springframework.util.Assert.notNull(Assert.java:123)
    2 frames
  3. Spring Hateoas
    ResourceAssemblerSupport.createResourceWithId
    1. org.springframework.hateoas.mvc.ResourceAssemblerSupport.createResourceWithId(ResourceAssemblerSupport.java:87)
    1 frame
  4. org.springframework.xd
    BatchStepExecutionsController.list
    1. org.springframework.xd.dirt.rest.StepExecutionInfoResourceAssembler.toResource(StepExecutionInfoResourceAssembler.java:39)
    2. org.springframework.xd.dirt.rest.BatchStepExecutionsController.list(BatchStepExecutionsController.java:107)
    2 frames