{"record":{"id":"5c2172a66f021247","repo":"hibernate/hibernate-orm","slug":"entity-may-not-be-null-5c2172","errorCode":null,"errorMessage":"Entity may not be null","messagePattern":"Entity may not be null","errorType":"exception","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java","lineNumber":1637,"sourceCode":"\tpublic String bestGuessEntityName(@Nonnull Object object) {\n\t\tfinal var lazyInitializer = extractLazyInitializer( object );\n\t\treturn guessEntityName( lazyInitializer == null\n\t\t\t\t? object\n\t\t\t\t: lazyInitializer.getImplementation() );\n\t}\n\n\t@Override\n\tpublic Object getContextEntityIdentifier(@Nonnull Object object) {\n\t\tcheckOpen();\n\t\treturn null;\n\t}\n\n\t@Override\n\tpublic String guessEntityName(@Nonnull Object entity) {\n\t\tcheckOpen();\n\t\t//noinspection ConstantValue\n\t\tif ( entity == null ) {\n\t\t\tthrow new IllegalArgumentException( \"Entity may not be null\" );\n\t\t}\n\t\treturn entity.getClass().getName();\n\t}\n\n\t@Override\n\t@Nonnull\n\tpublic EntityPersister getEntityPersister(@Nullable String entityName, @Nonnull Object entity) {\n\t\tcheckOpen();\n\t\t//noinspection ConstantValue\n\t\tif ( entity == null ) {\n\t\t\tthrow new IllegalArgumentException( \"Entity may not be null\" );\n\t\t}\n\t\treturn entityName == null\n\t\t\t\t? requireEntityPersister( guessEntityName( entity ) )\n\t\t\t\t: requireEntityPersister( entityName ).getSubclassEntityPersister( entity, getFactory() );\n\t}\n\n\t@Override","sourceCodeStart":1619,"sourceCodeEnd":1655,"githubUrl":"https://github.com/hibernate/hibernate-orm/blob/fad1729dce015f908198d57a8d80274a30f905a5/hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java#L1619-L1655","documentation":"Error \"Entity may not be null\" thrown in hibernate/hibernate-orm.","triggerScenarios":"Thrown at hibernate-core/src/main/java/org/hibernate/internal/StatelessSessionImpl.java:1637 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Pass a non-null entity instance to the StatelessSession operation; null-check before the call."],"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"}