{"record":{"id":"51233c2b31e5699b","repo":"alibaba/canal","slug":"read-mapping-config-error-51233c","errorCode":null,"errorMessage":"Read mapping config: {} error. ","messagePattern":"Read mapping config: (.+?) error\\. ","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"client-adapter/common/src/main/java/com/alibaba/otter/canal/client/adapter/support/MappingConfigsLoader.java","lineNumber":66,"sourceCode":"        // 先取本地文件，再取类路径\n        File filePath = new File(\"..\" + File.separator + Constant.CONF_DIR + File.separator + name);\n        if (!filePath.exists()) {\n            URL url = MappingConfigsLoader.class.getClassLoader().getResource(\"\");\n            if (url != null) {\n                filePath = new File(url.getPath() + name);\n            }\n        }\n        if (filePath.exists()) {\n            String fileName = filePath.getName();\n            if (!(fileName.endsWith(\".yml\") || fileName.endsWith(\".yaml\"))) {\n                return null;\n            }\n            try (InputStream in = new FileInputStream(filePath)) {\n                byte[] bytes = new byte[in.available()];\n                in.read(bytes);\n                return new String(bytes, StandardCharsets.UTF_8);\n            } catch (IOException e) {\n                throw new RuntimeException(\"Read mapping config: \" + filePath.getAbsolutePath() + \" error. \", e);\n            }\n        }\n        return null;\n    }\n}\n","sourceCodeStart":48,"sourceCodeEnd":72,"githubUrl":"https://github.com/alibaba/canal/blob/87be50e87686a3e8af08c368d0e1ffd1f59eb04a/client-adapter/common/src/main/java/com/alibaba/otter/canal/client/adapter/support/MappingConfigsLoader.java#L48-L72","documentation":"Error \"Read mapping config: {} error. \" thrown in alibaba/canal.","triggerScenarios":"Thrown at client-adapter/common/src/main/java/com/alibaba/otter/canal/client/adapter/support/MappingConfigsLoader.java:66 when the library encounters an invalid state.","commonSituations":"Failed reading a mapping config file. Validate file existence and YAML syntax up front, and report the exact file so misconfigured adapters are found quickly.","solutions":["Fix YAML syntax errors in the reported mapping config file.","Confirm required keys (dataSourceKey/outerAdapterKey/dbMapping) are present and correctly nested."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"87be50e87686a3e8af08c368d0e1ffd1f59eb04a","analyzedAt":"2026-08-14T04:30:11.918Z","schemaVersion":2},"datasetVersion":"2026-08-14T05:17:29.042Z"}