{"record":{"id":"93fd3ecfef62e4fc","repo":"hibernate/hibernate-orm","slug":"null-entity-instance","errorCode":null,"errorMessage":"null entity instance","messagePattern":"null entity instance","errorType":"exception","errorClass":"UnsupportedOperationException","httpStatus":null,"severity":"error","filePath":"hibernate-core/src/main/java/org/hibernate/loader/ast/internal/SingleIdEntityLoaderProvidedQueryImpl.java","lineNumber":60,"sourceCode":"\t@Override @SuppressWarnings(\"unchecked\")\n\tpublic T load(Object pkValue, LockOptions lockOptions, Boolean readOnly, SharedSessionContractImplementor session) {\n\t\tfinal var mappedJavaType = (JavaType<T>) entityDescriptor.getMappedJavaType();\n\t\tfinal var query = namedQueryMemento.toSelectionQuery( session, mappedJavaType.getJavaTypeClass() );\n\t\tquery.setParameter( (Parameter<Object>) query.getParameters().iterator().next(), pkValue );\n\t\tquery.setQueryFlushMode( QueryFlushMode.NO_FLUSH );\n\t\tquery.setResultListTransformer( uniqueResultTransformer() );\n\t\treturn query.uniqueResult();\n\t}\n\n\t@Override\n\tpublic T load(\n\t\t\tObject pkValue,\n\t\t\tObject entityInstance,\n\t\t\tLockOptions lockOptions,\n\t\t\tBoolean readOnly,\n\t\t\tSharedSessionContractImplementor session) {\n\t\tif ( entityInstance != null ) {\n\t\t\tthrow new UnsupportedOperationException(\"null entity instance\");\n\t\t}\n\t\treturn load( pkValue, lockOptions, readOnly, session );\n\t}\n\n\t@Override\n\tpublic Object[] loadDatabaseSnapshot(Object id, SharedSessionContractImplementor session) {\n\t\treturn EMPTY_OBJECT_ARRAY;\n\t}\n}\n","sourceCodeStart":42,"sourceCodeEnd":70,"githubUrl":"https://github.com/hibernate/hibernate-orm/blob/fad1729dce015f908198d57a8d80274a30f905a5/hibernate-core/src/main/java/org/hibernate/loader/ast/internal/SingleIdEntityLoaderProvidedQueryImpl.java#L42-L70","documentation":"Error \"null entity instance\" thrown in hibernate/hibernate-orm.","triggerScenarios":"Thrown at hibernate-core/src/main/java/org/hibernate/loader/ast/internal/SingleIdEntityLoaderProvidedQueryImpl.java:60 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Internal loader invariant violated; ensure the provided query for the entity returns a result and the entity mapping is valid."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"fad1729dce015f908198d57a8d80274a30f905a5","analyzedAt":"2026-08-22T04:13:57.527Z","schemaVersion":2},"datasetVersion":"2026-08-22T09:17:25.309Z"}