{"record":{"id":"c2fbffa874421567","repo":"appsmithorg/appsmith","slug":"pe-jsn-4000-c2fbff","errorCode":"PE-JSN-4000","errorMessage":"Plugin failed to parse JSON \"{0}\"","messagePattern":"Plugin failed to parse JSON \"(.+?)\"","errorType":"exception","errorClass":"AppsmithPluginException","httpStatus":500,"severity":"error","filePath":"app/server/appsmith-plugins/googleSheetsPlugin/src/main/java/com/external/config/RowsUpdateMethod.java","lineNumber":87,"sourceCode":"                        ErrorMessages.INVALID_TABLE_HEADER_INDEX,\n                        e.getMessage());\n            }\n        } else {\n            throw new AppsmithPluginException(\n                    AppsmithPluginError.PLUGIN_EXECUTE_ARGUMENT_ERROR, ErrorMessages.INVALID_TABLE_HEADER_INDEX);\n        }\n        final String body = methodConfig.getRowObjects();\n        try {\n            this.getRowObjectFromBody(this.objectMapper.readTree(body));\n        } catch (IllegalArgumentException e) {\n            if (!StringUtils.hasLength(body)) {\n                throw new AppsmithPluginException(\n                        AppsmithPluginError.PLUGIN_EXECUTE_ARGUMENT_ERROR,\n                        ErrorMessages.EMPTY_UPDATE_ROW_OBJECT_MESSAGE);\n            }\n            throw new AppsmithPluginException(AppsmithPluginError.PLUGIN_EXECUTE_ARGUMENT_ERROR, e.getMessage());\n        } catch (JsonProcessingException e) {\n            throw new AppsmithPluginException(\n                    AppsmithPluginError.PLUGIN_JSON_PARSE_ERROR,\n                    methodConfig.getRowObjects(),\n                    ErrorMessages.PARSING_FAILED_EXPECTED_A_ROW_OBJECT_ERROR_MSG + \" Error: \" + e.getMessage());\n        }\n        return true;\n    }\n\n    @Override\n    public Mono<Object> executePrerequisites(MethodConfig methodConfig, OAuth2 oauth2) {\n        WebClient client =\n                WebClientUtils.builder().exchangeStrategies(EXCHANGE_STRATEGIES).build();\n        final RowsGetMethod rowsGetMethod = new RowsGetMethod(this.objectMapper);\n\n        final String body = methodConfig.getRowObjects();\n        RowObject rowObjectFromBody = null;\n        try {\n            rowObjectFromBody = this.getRowObjectFromBody(this.objectMapper.readTree(body));\n        } catch (JsonProcessingException e) {","sourceCodeStart":69,"sourceCodeEnd":105,"githubUrl":"https://github.com/appsmithorg/appsmith/blob/8cd9021c24cdbea1c3c12c966073708e83db60c2/app/server/appsmith-plugins/googleSheetsPlugin/src/main/java/com/external/config/RowsUpdateMethod.java#L69-L105","documentation":"Thrown in RowsUpdateMethod.validateExecutionMethodRequest in the catch (JsonProcessingException e) branch (line 87). objectMapper.readTree(body) succeeded in tokenizing but the resulting tree is not a valid row object payload - more precisely this branch is reached when readTree throws (truly malformed JSON), since the IllegalArgumentException branch (271) catches structural-but-wrong shapes. Code: PLUGIN_JSON_PARSE_ERROR (PE-JSN-4000). Message: \"Plugin failed to parse JSON \\\"{0}\\\"\" with the raw body and PARSING_FAILED_EXPECTED_A_ROW_OBJECT_ERROR_MSG + the Jackson error message.","triggerScenarios":"Body is malformed JSON - unbalanced braces, trailing comma, single quotes, unquoted keys, a JS object literal pasted instead of JSON (e.g. {a: 1} instead of {\"a\": 1}), or a template that produced 'undefined'/'NaN' inside the JSON.","commonSituations":"Hand-typed JSON in the editor; a JS object literal (not JSON) pasted into the binding; template substitution inserting undefined/NaN which JSON.stringify would have filtered; copy-paste from a console.log of an object.","solutions":["Always JSON.stringify a JS object instead of hand-writing JSON: {{ JSON.stringify({ name: row.name, age: row.age }) }}.","Validate client-side: try { JSON.parse(value) } catch and block the run.","If pasting JSON, validate with a JSON linter before saving.","Avoid template-string interpolation into JSON; build the object then stringify.","Check the raw body in the error message - Jackson's error pinpoints the bad token."],"exampleFix":"// Before (hand-written, fragile)\n{ \"name\": \"{{Input1.text}}\", \"age\": {{Input2.text}} }\n// Input2 empty -> { ..., \"age\":  } is invalid JSON\n\n// After (safe)\n{{ JSON.stringify({ name: Input1.text, age: Number(Input2.text) }) }}","handlingStrategy":"validation","validationCode":"function buildRowJson(obj) {\n  // build from a real JS object, never hand-written JSON\n  const clean = Object.fromEntries(\n    Object.entries(obj).filter(([_, v]) => v !== undefined && v !== null && !Number.isNaN(v))\n  );\n  const str = JSON.stringify(clean); // throws if cyclic - caller should try/catch\n  try { JSON.parse(str); return str; } catch { return null; }\n}","typeGuard":"function isParsableJson(s) {\n  if (typeof s !== 'string' || s.trim() === '') return false;\n  try { JSON.parse(s); return true; } catch { return false; }\n}","tryCatchPattern":"try {\n  const body = JSON.stringify(rowObj);\n  JSON.parse(body); // sanity\n  UpdateRow.run({ rowObjects: body });\n} catch (e) {\n  showAlert('Row body is not valid JSON: ' + e.message, 'error');\n}","preventionTips":["Never hand-write JSON in bindings - always JSON.stringify a JS object.","Avoid interpolating raw text into a JSON template.","Validate with JSON.parse before submitting.","Filter undefined/NaN values from the object first."],"tags":["appsmith","google-sheets","json-parsing","jackson","row-update","validation"],"backgroundTag":null,"analyzedSha":"8cd9021c24cdbea1c3c12c966073708e83db60c2","analyzedAt":"2026-08-12T22:14:19.293Z","schemaVersion":2},"datasetVersion":"2026-08-12T23:17:12.415Z"}