{"record":{"id":"1f3d4d774d40cf21","repo":"appsmithorg/appsmith","slug":"pe-jsn-4000-1f3d4d","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/RowsAppendMethod.java","lineNumber":87,"sourceCode":"            } catch (NumberFormatException e) {\n                throw new AppsmithPluginException(\n                        AppsmithPluginError.PLUGIN_EXECUTE_ARGUMENT_ERROR, ErrorMessages.INVALID_TABLE_HEADER_INDEX);\n            }\n        } else {\n            throw new AppsmithPluginException(\n                    AppsmithPluginError.PLUGIN_EXECUTE_ARGUMENT_ERROR, ErrorMessages.INVALID_TABLE_HEADER_INDEX);\n        }\n        JsonNode bodyNode;\n        try {\n            bodyNode = this.objectMapper.readTree(methodConfig.getRowObjects());\n        } catch (IllegalArgumentException e) {\n            if (!StringUtils.hasLength(methodConfig.getRowObjects())) {\n                throw new AppsmithPluginException(\n                        AppsmithPluginError.PLUGIN_EXECUTE_ARGUMENT_ERROR, ErrorMessages.EMPTY_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\n        if (bodyNode.isArray()) {\n            throw new AppsmithPluginException(\n                    AppsmithPluginError.PLUGIN_EXECUTE_ARGUMENT_ERROR,\n                    ErrorMessages.EXPECTED_ROW_OBJECT_BUT_FOUND_ARRAY_ERROR_MSG);\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);","sourceCodeStart":69,"sourceCodeEnd":105,"githubUrl":"https://github.com/appsmithorg/appsmith/blob/8cd9021c24cdbea1c3c12c966073708e83db60c2/app/server/appsmith-plugins/googleSheetsPlugin/src/main/java/com/external/config/RowsAppendMethod.java#L69-L105","documentation":"Thrown by RowsAppendMethod.validateExecutionMethodRequest when objectMapper.readTree throws JsonProcessingException — i.e. the rowObjects string is non-empty, looks like JSON, but is syntactically malformed. Code PE-JSN-4000 maps to PLUGIN_JSON_PARSE_ERROR (message template 'Plugin failed to parse JSON \"{0}\"', Appsmith category 'Invalid JSON found', INTERNAL_ERROR). The thrown message appends the raw rowObjects and the Jackson parse error.","triggerScenarios":"Providing a rowObjects string with JSON syntax errors: unquoted keys, trailing commas, single quotes, missing braces, or stray characters. readTree raises JsonProcessingException and the catch wraps it as PLUGIN_JSON_PARSE_ERROR.","commonSituations":"Hand-typed JSON in the query editor, templated strings that produced malformed output, or copy-paste introducing smart quotes.","solutions":["Validate the JSON in a linter (jsonlint.com) and fix the syntax error named in the appended 'Error:' detail.","Use JSON.stringify in a JS binding so Appsmith serializes correctly: {{ JSON.stringify({Name: 'Alice', Age: 30}) }}.","Quote all keys with double quotes and remove trailing commas."],"exampleFix":"// before\n{Name: 'Alice', Age: 30,}   // unquoted keys, trailing comma, single quotes\n\n// after\n{\"Name\":\"Alice\",\"Age\":30}","handlingStrategy":"validation","validationCode":"// Reject malformed JSON before the plugin sees it\nString rowObjects = methodConfig.getRowObjects();\ntry {\n    objectMapper.readTree(rowObjects);\n} catch (com.fasterxml.jackson.core.JsonProcessingException e) {\n    // show e.getMessage() to the user and abort the query\n}","typeGuard":"boolean isValidJsonObject(ObjectMapper om, String s) {\n    try {\n        var n = om.readTree(s);\n        return n != null && n.isObject();\n    } catch (Exception e) { return false; }\n}","tryCatchPattern":null,"preventionTips":["Lint JSON in the editor (Appsmith shows parse errors live).","Prefer JSON.stringify over hand-written JSON in bindings.","Use double-quoted keys; avoid trailing commas and single quotes."],"tags":["google-sheets","appsmith","json","validation","parsing","row-object"],"backgroundTag":null,"analyzedSha":"8cd9021c24cdbea1c3c12c966073708e83db60c2","analyzedAt":"2026-08-12T22:14:19.293Z","schemaVersion":2},"datasetVersion":"2026-08-12T23:17:12.415Z"}