{"record":{"id":"2375e7485ac8eda5","repo":"apache/dubbo","slug":"failed-to-compile-class-cause-class-cod","errorCode":null,"errorMessage":"Failed to compile class, cause: {}, class: {}, code: \n{}\n, stack: {}","messagePattern":"Failed to compile class, cause: (.+?), class: (.+?), code: \n(.+?)\n, stack: (.+?)","errorType":"exception","errorClass":"IllegalStateException","httpStatus":null,"severity":"error","filePath":"dubbo-common/src/main/java/org/apache/dubbo/common/compiler/support/AbstractCompiler.java","lineNumber":74,"sourceCode":"        String className = pkg != null && pkg.length() > 0 ? pkg + \".\" + cls : cls;\n        Lock lock = CLASS_IN_CREATION_MAP.get(className);\n        if (lock == null) {\n            CLASS_IN_CREATION_MAP.putIfAbsent(className, new ReentrantLock());\n            lock = CLASS_IN_CREATION_MAP.get(className);\n        }\n        try {\n            lock.lock();\n            return Class.forName(className, true, classLoader);\n        } catch (ClassNotFoundException e) {\n            if (!code.endsWith(\"}\")) {\n                throw new IllegalStateException(\"The java code not endsWith \\\"}\\\", code: \\n\" + code + \"\\n\");\n            }\n            try {\n                return doCompile(neighbor, classLoader, className, code);\n            } catch (RuntimeException t) {\n                throw t;\n            } catch (Throwable t) {\n                throw new IllegalStateException(\"Failed to compile class, cause: \" + t.getMessage() + \", class: \"\n                        + className + \", code: \\n\" + code + \"\\n, stack: \" + ClassUtils.toString(t));\n            }\n        } finally {\n            lock.unlock();\n        }\n    }\n\n    protected Class<?> doCompile(ClassLoader classLoader, String name, String source) throws Throwable {\n        return null;\n    }\n\n    protected Class<?> doCompile(Class<?> neighbor, ClassLoader classLoader, String name, String source)\n            throws Throwable {\n        return doCompile(classLoader, name, source);\n    }\n}\n","sourceCodeStart":56,"sourceCodeEnd":91,"githubUrl":"https://github.com/apache/dubbo/blob/3a3043227f5571d25eb2889de5bca22f2914843b/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/support/AbstractCompiler.java#L56-L91","documentation":"Thrown by AbstractCompiler.compile when doCompile (the subclass-specific compilation step) raises a checked Throwable that is not a RuntimeException. The original cause, class name, full source, and stack trace are bundled into an IllegalStateException for diagnostics.","triggerScenarios":"The concrete compiler (JdkCompiler, JavassistCompiler) threw an exception during the actual compile/load step — e.g. a syntax error, missing dependency, classloader failure, or tooling error. RuntimeExceptions propagate unchanged; everything else is wrapped here.","commonSituations":"Generated SPI/Adaptive extension source has a genuine compile error (undefined symbol, bad syntax). The compiler cannot access a required class on the classpath. Javassist/JDK compiler tooling version mismatch or configuration issue.","solutions":["Read the cause message and stack in the exception — it identifies the real compilation problem.","Fix the generated source (syntax error, missing import, undefined reference) that the cause describes.","Ensure all classes referenced by the generated source are on the compilation classpath.","Verify the compiler implementation (JdkCompiler vs JavassistCompiler) matches your JVM/toolchain."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"// Pre-validate the generated source for obvious errors before compiling\nif (code == null || code.isEmpty() || !code.contains(\"class \")) {\n    throw new IllegalArgumentException(\"invalid generated source\");\n}","typeGuard":null,"tryCatchPattern":"try {\n    compiler.compile(neighbor, code, classLoader);\n} catch (IllegalStateException e) {\n    // inspect e.getMessage() for the cause, class, and source; fix the generated code\n}","preventionTips":["Read the cause message in the wrapped exception to find the real compile error.","Ensure all classes referenced by generated source are on the classpath.","Unit-test code generators against expected output.","Match the compiler implementation to the running JDK/toolchain."],"tags":["compiler","code-generation","classloading","spi"],"backgroundTag":null,"analyzedSha":"3a3043227f5571d25eb2889de5bca22f2914843b","analyzedAt":"2026-08-14T00:43:19.853Z","schemaVersion":2},"datasetVersion":"2026-08-14T05:17:29.042Z"}