{"record":{"id":"8be4d7b6d6ce12d7","repo":"flowable/flowable-engine","slug":"could-not-find-matching-parse-handler-for-thi","errorCode":null,"errorMessage":"Could not find matching parse handler for '{}' this is likely a bug.","messagePattern":"Could not find matching parse handler for '(.+?)' this is likely a bug\\.","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"modules/flowable-cmmn-engine/src/main/java/org/flowable/cmmn/engine/impl/parser/CmmnParseHandlers.java","lineNumber":72,"sourceCode":"\n        List<CmmnParseHandler> handlers = null;\n        if (baseElement instanceof PlanItem planItem) {\n            // The plan item definition defines the actual behavior\n            handlers = parseHandlers.get(planItem.getPlanItemDefinition().getClass());\n\n            if (handlers == null) {\n                LOGGER.warn(\"Could not find matching parse handler for planItem '{}' with planItemDefinition '{}'. This is likely a bug.\",\n                    baseElement.getId(), planItem.getPlanItemDefinition());\n\n            } else {\n                handlers.forEach(handler -> handler.parse(cmmnParser, cmmnParseResult, planItem)); // Note: passing plan item, NOT plan item definition\n\n            }\n\n        } else {\n            handlers = parseHandlers.get(baseElement.getClass());\n            if (handlers == null) {\n                LOGGER.warn(\"Could not find matching parse handler for '{}' this is likely a bug.\", baseElement.getId());\n\n            } else {\n                handlers.forEach(handler -> handler.parse(cmmnParser, cmmnParseResult, baseElement));\n\n            }\n\n        }\n    }\n\n}\n","sourceCodeStart":54,"sourceCodeEnd":83,"githubUrl":"https://github.com/flowable/flowable-engine/blob/d6d39ce1c69ff244f2d9dc6af756a9b95e865586/modules/flowable-cmmn-engine/src/main/java/org/flowable/cmmn/engine/impl/parser/CmmnParseHandlers.java#L54-L83","documentation":"CmmnParseHandlers walks the parsed CMMN model and, for each BaseElement, looks up registered CmmnParseHandlers keyed by the element's class. When an element class has no registered handler, this warning is logged and the element is silently skipped rather than failing deployment. Flowable treats it as a bug because every model element type it can produce should have a handler registered.","triggerScenarios":"Parsing/deploying a CMMN XML whose model contains an element class not present in the parseHandlers map — e.g. a custom element type, an element added in a newer Flowable XSD being parsed by an older engine, or programmatic construction of a CmmnModel with element types the parser never registers.","commonSituations":"Deploying CMMN XML produced by a newer Flowable modeler into an older engine runtime; subclassing CMMN elements in custom code without registering a handler via CmmnParserImpl.addParseHandler; a Flowable bug for a newly introduced element type.","solutions":["Check that the engine version matches the modeler/designer version used to produce the CMMN XML, and upgrade the flowable-cmmn-engine dependency if the XML uses newer element types","Inspect the element id logged in the warning, find its class in the CmmnModel, and register a handler: cmmnEngineConfiguration.getCmmnParser().addParseHandler(MyElement.class, myHandler)","Remove or fix the unsupported element in the CMMN XML if it is not needed","If it appears with stock XML and matching versions, report it to Flowable as a bug with the model attached"],"exampleFix":"// before: element has no handler, silently skipped\nCmmnParser parser = cmmnEngineConfiguration.getCmmnParser();\n// after: register a handler for the missing element type\nparser.addParseHandler(MyCustomElement.class, (cmmnParser, result, element) -> {\n    // parse logic for the element\n});","handlingStrategy":"validation","validationCode":"CmmnModel model = new CmmnXmlConverter().convertToCmmnModel(xml, true, false, \"UTF-8\");\nSet<Class<?>> handled = cmmnParser.getParseHandlers().keySet();\nList<BaseElement> unhandled = collectElements(model).stream()\n    .filter(e -> !handled.contains(e.getClass())).collect(Collectors.toList());\nif (!unhandled.isEmpty()) throw new IllegalStateException(\"Unhandled elements: \" + unhandled);","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Keep modeler and flowable-cmmn-engine versions aligned","Register parse handlers for any custom element subclasses","Scan deployment logs for this warning in CI before promoting deployments"],"tags":["cmmn","parser","missing-handler","deployment"],"backgroundTag":"unsupported-operation","analyzedSha":"d6d39ce1c69ff244f2d9dc6af756a9b95e865586","analyzedAt":"2026-09-11T06:41:19.413Z","contentChangedAt":"2026-09-11T06:41:19.413Z","schemaVersion":2},"datasetVersion":"2026-09-18T11:17:12.947Z"}