{"record":{"id":"5a8d483b058593c1","repo":"apache/beam","slug":"unable-to-generate-a-getter-for-getter-s","errorCode":null,"errorMessage":"Unable to generate a getter for getter '%s'","messagePattern":"Unable to generate a getter for getter '(.+?)'","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/utils/JavaBeanUtils.java","lineNumber":200,"sourceCode":"            BYTE_BUDDY,\n            m.getDeclaringClass(),\n            typeConversionsFactory.createTypeConversion(false).convert(typeInformation.getType()));\n    builder = implementGetterMethods(builder, typeInformation, typeConversionsFactory);\n    try {\n      return builder\n          .visit(new AsmVisitorWrapper.ForDeclaredMethods().writerFlags(ClassWriter.COMPUTE_FRAMES))\n          .make()\n          .load(\n              ReflectHelpers.findClassLoader(m.getDeclaringClass().getClassLoader()),\n              getClassLoadingStrategy(m.getDeclaringClass()))\n          .getLoaded()\n          .getDeclaredConstructor()\n          .newInstance();\n    } catch (InstantiationException\n        | IllegalAccessException\n        | NoSuchMethodException\n        | InvocationTargetException e) {\n      throw new RuntimeException(\n          \"Unable to generate a getter for getter '\" + typeInformation.getMethod() + \"'\");\n    }\n  }\n\n  private static <ObjectT extends @NonNull Object, ValueT>\n      DynamicType.Builder<FieldValueGetter<ObjectT, ValueT>> implementGetterMethods(\n          DynamicType.Builder<FieldValueGetter<ObjectT, ValueT>> builder,\n          FieldValueTypeInformation typeInformation,\n          TypeConversionsFactory typeConversionsFactory) {\n    return builder\n        .method(ElementMatchers.named(\"name\"))\n        .intercept(FixedValue.reference(typeInformation.getName()))\n        .method(ElementMatchers.named(\"get\"))\n        .intercept(new InvokeGetterInstruction(typeInformation, typeConversionsFactory));\n  }\n\n  // The list of setters for a class is cached, so we only create the classes the first time\n  // getSetters is called.","sourceCodeStart":182,"sourceCodeEnd":218,"githubUrl":"https://github.com/apache/beam/blob/12126d8942aaf848030c478b4c6a28c6af861c66/sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/utils/JavaBeanUtils.java#L182-L218","documentation":"JavaBeanUtils.createGetter uses ByteBuddy to generate a FieldValueGetter class and then reflectively instantiates it. If instantiation or construction fails for any reason (InstantiationException, IllegalAccessException, NoSuchMethodException, InvocationTargetException), the original cause is discarded and a bare RuntimeException is thrown, making this an internal codegen failure signal.","triggerScenarios":"ByteBuddy-generated getter class cannot be constructed on the current JVM/classloader — e.g. security manager denying access, JIT/classgen limits, classloader isolation on workers, or a ByteBuddy/JDK version incompatibility (newer JDK bytecode versions unsupported).","commonSituations":"Running Beam on a very new JDK not supported by the bundled ByteBuddy; shaded-jar conflicts where ByteBuddy classes are relocated inconsistently; restricted environments blocking defineClass; corrupted classpath on workers.","solutions":["Check the suppressed cause by running locally with a debugger/logback on the reflective call; fix the root cause.","Upgrade the Beam version (and its ByteBuddy) to support your JDK.","Avoid shading/relocation conflicts for net.bytebuddy classes in your fat jar.","Fall back to non-ByteBuddy access paths (e.g. use POJO/Avro schema providers or reflection-based getters) if codegen is blocked in your environment."],"exampleFix":"// before: pinned old ByteBuddy shading breaks defineClass on JDK 17\n// after\n<dependency><groupId>net.bytebuddy</groupId><artifactId>byte-buddy</artifactId><version>1.14.x</version></dependency> // or upgrade Beam SDK","handlingStrategy":"try-catch","validationCode":"// smoke-test codegen early in job setup\ntry { JavaBeanUtils.getGetterInvokers(sampleBean, Schema.of(BeanClass.class)); } catch (RuntimeException e) { /* fail fast with root-cause logging */ }","typeGuard":null,"tryCatchPattern":"try { getters = createGetter(typeInformation); } catch (RuntimeException e) { throw new IllegalStateException(\"Getter codegen failed; check ByteBuddy/JDK compatibility\", e); }","preventionTips":["Run pipelines on JDK versions supported by your Beam SDK's ByteBuddy.","Avoid double-shading ByteBuddy in fat jars.","Smoke-test schema creation on a worker image before full deploys.","Log suppressed exceptions to capture the real reflective failure cause."],"tags":["java","bytebuddy","code-generation","reflection"],"backgroundTag":"internal-invariant-violation","analyzedSha":"12126d8942aaf848030c478b4c6a28c6af861c66","analyzedAt":"2026-09-13T01:50:10.254Z","contentChangedAt":"2026-09-13T01:50:10.254Z","schemaVersion":2},"datasetVersion":"2026-09-14T16:17:12.679Z"}