{"record":{"id":"f8b24306b908fbcf","repo":"alibaba/spring-ai-alibaba","slug":"failed-to-inspect-metadata-record","errorCode":null,"errorMessage":"Failed to inspect metadata record {}","messagePattern":"Failed to inspect metadata record (.+?)","errorType":"exception","errorClass":"IOException","httpStatus":null,"severity":"error","filePath":"spring-ai-alibaba-graph-core/src/main/java/com/alibaba/cloud/ai/graph/serializer/plain_text/jackson/SerializationHelper.java","lineNumber":239,"sourceCode":"\t\treturn value;\n\t}\n\n\tprivate static boolean requiresRecordNormalization(SerializerProvider provider, Record record,\n\t\t\tList<BeanPropertyDefinition> properties) throws IOException {\n\t\tfor (BeanPropertyDefinition property : properties) {\n\t\t\tAnnotatedMember accessor = property.getAccessor();\n\t\t\tif (accessor == null) {\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\ttry {\n\t\t\t\taccessor.fixAccess(provider.isEnabled(MapperFeature.OVERRIDE_PUBLIC_ACCESS_MODIFIERS));\n\t\t\t\tObject propertyValue = accessor.getValue(record);\n\t\t\t\tif (hasIncompatibleContainerValue(property.getPrimaryType(), propertyValue)) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t\tcatch (IllegalArgumentException ex) {\n\t\t\t\tthrow new IOException(\"Failed to inspect metadata record \" + record.getClass().getName(), ex);\n\t\t\t}\n\t\t}\n\t\treturn false;\n\t}\n\n\tprivate static boolean hasIncompatibleContainerValue(JavaType declaredType, Object value) {\n\t\tif (declaredType.isCollectionLikeType() && value instanceof Collection<?> collection) {\n\t\t\treturn hasIncompatibleValue(declaredType.getContentType(), collection);\n\t\t}\n\t\tif (declaredType.isMapLikeType() && value instanceof Map<?, ?> map) {\n\t\t\treturn hasIncompatibleValue(declaredType.getKeyType(), map.keySet())\n\t\t\t\t\t|| hasIncompatibleValue(declaredType.getContentType(), map.values());\n\t\t}\n\t\treturn false;\n\t}\n\n\tprivate static boolean hasIncompatibleValue(JavaType declaredType, Collection<?> values) {\n\t\tif (declaredType == null || declaredType.getRawClass() == Object.class) {","sourceCodeStart":221,"sourceCodeEnd":257,"githubUrl":"https://github.com/alibaba/spring-ai-alibaba/blob/f82da0b50f35744c13968191be2b1cd2452ef550/spring-ai-alibaba-graph-core/src/main/java/com/alibaba/cloud/ai/graph/serializer/plain_text/jackson/SerializationHelper.java#L221-L257","documentation":"requiresRecordNormalization inspects each record property to detect container values incompatible with the declared type. If that inspection (accessor invocation or Jackson type resolution) throws IllegalArgumentException, it is wrapped as an IOException reporting the record class name, since normalization cannot proceed safely.","triggerScenarios":"normalizeMetadataValue -> requiresRecordNormalization: invoking a record accessor for property inspection threw IllegalArgumentException — typically an accessor with embedded validation failing on current field values.","commonSituations":"Records whose accessors enforce invariants that are currently violated (e.g. after reflection-based construction); corrupt in-memory state passed as metadata; Jackson type introspection failing on exotic generic declarations.","solutions":["Read the wrapped cause to identify the failing property and correct the record's field values before adding it to metadata","Move validation out of accessors into the compact constructor so access is always safe","Ensure the record's generic/container types are concrete and Jackson-resolvable","If the record only carries data for persistence, simplify it to plain components without access-time checks"],"exampleFix":"// before: inspect-time throw\npublic int count() { if (count < 0) throw new IllegalArgumentException(\"negative\"); return count; }\n// after: validate at construction\npublic record Counter(int count) { public Counter { if (count < 0) throw new IllegalArgumentException(\"negative\"); } }","handlingStrategy":"try-catch","validationCode":"try { accessor.invoke(record); return true; } catch (IllegalArgumentException e) { return false; }","typeGuard":"boolean isInspectable(Object record) {\n    try { for (PropertyAccessor a : accessors) a.getValue(record); return true; } catch (IllegalArgumentException e) { return false; }\n}","tryCatchPattern":"try { metadata.put(key, record); } catch (IOException e) { if (e.getMessage().startsWith(\"Failed to inspect metadata record\")) { metadata.put(key, objectMapper.convertValue(sanitized(record), Map.class)); } else throw e; }","preventionTips":["Construct records only through their canonical constructors so invariants hold","Avoid accessors that throw; treat records as pure data carriers","Round-trip-test metadata values with the production ObjectMapper before use"],"tags":["serialization","jackson","records"],"backgroundTag":"json-marshal-failed","analyzedSha":"f82da0b50f35744c13968191be2b1cd2452ef550","analyzedAt":"2026-09-09T15:32:42.421Z","contentChangedAt":"2026-09-09T15:32:42.421Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}