Mule - Salesforce connector - Retrieve job failed results bulk v2 - not returning failed data - salesforce

Question

I am querying Salesforce Bulk api failed results in Mule. But it doesn't fetch the data. It jus shows the record id and error message. But if i check in workbench, it shows the id, error, datacolumns(a,b,c)
How to get those details..Is there any other way to get the bulk api v2 failed results in Mule
doing simple Transformation before logging
%dw 2.0
output application/json
---
payload
Debug Log :
On workbench, I get the actual data.
please share your thoughts why i don't see those data

Answer 1

#RestResource(urlMapping='/bulkapi/failures')
global without sharing class RestGetBulkAPIResults
{
#HttpGet
global static void getFailedRecords()
{
RestRequest req = RestContext.request;
RestResponse res = RestContext.response;
res.addHeader('Content-Type', 'application/json');
Http http = new Http();
HttpRequest httpReq = new HttpRequest();
HttpResponse httpRes = new HttpResponse();
httpReq.setMethod('GET');
httpReq.setHeader('Authorization', 'Bearer ' + UserInfo.getSessionId());
string path = '/services/data/v48.0/jobs/ingest/7502i000001fJG9AAM/failedResults/';
httpReq.setEndpoint(URL.getSalesforceBaseUrl().toExternalForm()+ path);
httpRes = http.send(httpReq);
string op = httpRes.getBody();
string[] rowList = op.split('\n');
string[] headers = rowList[0].split(',');
integer columnsCount = headers.size();
integer dataRowsCount = rowList.size();
string fullFormattedData = '[';
for(integer rowIndex =1; rowIndex < dataRowsCount; rowIndex++)
{
string[] rowData = rowList[rowIndex].split(',');
string rowJsonData ='{';
for(integer columnIndex=0; columnIndex < columnsCount; columnIndex++)
{
rowJsonData += headers[columnIndex] + ':' + rowData[columnIndex] + ',';
}
rowJsonData = rowJsonData.removeEnd(',');
rowJsonData += '}';
fullFormattedData += rowJsonData;
}
fullFormattedData += ']';
system.debug('resp' + httpRes.getBody());
res.responseBody = Blob.valueOf(fullFormattedData);
res.statusCode = 200;
}
}