java.lang.NullPointerException: classExpression cannot be null

GitHub | cbobed | 3 months ago
  1. 0

    GitHub comment 12#254054308

    GitHub | 3 months ago | cbobed
    java.lang.NullPointerException: classExpression cannot be null
  2. 0
    Elasticsearch 1.x and 2.x nodes are not compatible, make sure your setup contains nodes of the same major version.
    via GitHub by dakrone
  3. 0
    It is a JDK bug, no workaround currently.
    via GitHub by jroper
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  5. 0
    Some of the parametes ar enull
  6. 0
    Try looking for variables that have been declared but not created as an object on the functions described in the stack trace.

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    Root Cause Analysis

    1. java.lang.NullPointerException

      classExpression cannot be null

      at org.semanticweb.owlapi.util.OWLAPIPreconditions.checkNotNull()
    2. org.semanticweb.owlapi
      OWLAPIPreconditions.checkNotNull
      1. org.semanticweb.owlapi.util.OWLAPIPreconditions.checkNotNull(OWLAPIPreconditions.java:98)
      1 frame
    3. uk.ac.manchester
      OWLDataFactoryImpl.getOWLClassAssertionAxiom
      1. uk.ac.manchester.cs.owl.owlapi.OWLDataFactoryImpl.getOWLClassAssertionAxiom(OWLDataFactoryImpl.java:1305)
      2. uk.ac.manchester.cs.owl.owlapi.OWLDataFactoryImpl.getOWLClassAssertionAxiom(OWLDataFactoryImpl.java:1296)
      2 frames
    4. org.semanticweb.owlapi
      InferredEntityAxiomGenerator.createAxioms
      1. org.semanticweb.owlapi.util.InferredClassAssertionAxiomGenerator.addAxioms(InferredClassAssertionAxiomGenerator.java:41)
      2. org.semanticweb.owlapi.util.InferredClassAssertionAxiomGenerator.addAxioms(InferredClassAssertionAxiomGenerator.java:32)
      3. org.semanticweb.owlapi.util.InferredEntityAxiomGenerator.createAxioms(InferredEntityAxiomGenerator.java:51)
      3 frames
    5. Unknown
      OWLReasonerPersistenceTest.main
      1. OWLReasonerPersistenceTest.retrieveAllInferredAxioms(OWLReasonerPersistenceTest.java:395)
      2. OWLReasonerPersistenceTest.main(OWLReasonerPersistenceTest.java:388)
      2 frames