@bsayed that is a strange behaviour. Please can you share the sample data in JSON and I can give it a try.

@saleempothiwala here is the input  

{
   "id": "e35fd529-613f-5e79-036f-f37c2801041d",
   "batchName": "SIT Axle3+ 9_12_test",
   "batchSize": 35,
   "numberOfAudited": 35,
   "batchType": "TRIP_BASED",
   "batchMode": "RANDOM",
   "batchFacility": "71",
   "batchDirection": "West",
   "batchPlaza": "",
   "batchLane": "",
   "fromTimestamp": 1694538060,
   "toTimestamp": 1694566800,
   "createdTimestamp": 1694626323,
   "createdBy": "mmccammon@etcc.com",
   "completedTimestamp": 1697039389,
   "completedBy": "asayed@etcc.com",
   "auditDetailList": [
      {
         "id": "a4f274d5-8de5-4c54-ae70-b6a498ab4e9e",
         "auditBatchId": "e35fd529-613f-5e79-036f-f37c2801041d",
         "eventId": "49dcbe2c-51a8-11ee-9348-3cecefd01508",
         "eventType": "TRIP",
         "eventTimeStamp": 1694549374,
         "auditResult": false,
         "auditCorrections": [],
         "auditedTimestamp": 1694635817,
         "auditedBy": "ppradeep@etcc.com",
         "isExcluded": false
      },
      {
         "id": "67a5f5e3-acc8-4965-bf0b-657a6dafbe2e",
         "auditBatchId": "e35fd529-613f-5e79-036f-f37c2801041d",
         "eventId": "724a03aa-51a9-11ee-9348-3cecefd01508",
         "eventType": "TRIP",
         "eventTimeStamp": 1694549871,
         "auditResult": false,
         "auditCorrections": [
            {
               "auditedField": "axle count",
               "originalValue": "3",
               "auditedValue": "4"
            }
         ],
         "auditedTimestamp": 1694636317,
         "auditedBy": "ppradeep@etcc.com",
         "isExcluded": false
      },
      {
         "id": "4f57507e-31ed-4e65-bcb8-6a7d176baece",
         "auditBatchId": "e35fd529-613f-5e79-036f-f37c2801041d",
         "eventId": "c4ef2560-51b1-11ee-9348-3cecefd01508",
         "eventType": "TRIP",
         "eventTimeStamp": 1694553445,
         "auditResult": true,
         "auditCorrections": [
            {
               "auditedField": "axle count",
               "originalValue": "3",
               "auditedValue": "4"
            }
         ],
         "auditedTimestamp": 1694637274,
         "auditedBy": "ppradeep@etcc.com",
         "auditNote": "Bus",
         "isExcluded": false
      },
      {
         "id": "7262657b-9b2a-4fd4-8b6d-fd842df8830e",
         "auditBatchId": "e35fd529-613f-5e79-036f-f37c2801041d",
         "eventId": "03dbfde2-51b8-11ee-9348-3cecefd01508",
         "eventType": "TRIP",
         "eventTimeStamp": 1694556128,
         "auditResult": false,
         "auditCorrections": [
            {
               "auditedField": "axle count",
               "originalValue": "5",
               "auditedValue": "8"
            }
         ],
         "auditedTimestamp": 1694637409,
         "auditedBy": "ppradeep@etcc.com",
         "isExcluded": false
      }
   ]
}

@bsayed 

Not sure on this behaviour , i will check it.

To make it work , as a work around ,you can use same field mapper processor twice and it will resolve the issue.

@Bikram I have tried to use 2 field mappers, however it only works for the next key value pair that are the same.

For example, try 2 field mappers with this json:

{
   "id": "e35fd529-613f-5e79-036f-f37c2801041d",
   "batchName": "SIT Axle3+ 9_12_test",
   "batchSize": 35,
   "numberOfAudited": 35,
   "batchType": "TRIP_BASED",
   "batchMode": "RANDOM",
   "batchFacility": "71",
   "batchDirection": "West",
   "batchPlaza": "",
   "batchLane": "",
   "fromTimestamp": 1694538060,
   "toTimestamp": 1694566800,
   "createdTimestamp": 1694626323,
   "createdBy": "mmccammon@etcc.com",
   "completedTimestamp": 1697039389,
   "completedBy": "asayed@etcc.com",
   "auditDetailList": [
      {
         "id": "a4f274d5-8de5-4c54-ae70-b6a498ab4e9e",
         "auditBatchId": "e35fd529-613f-5e79-036f-f37c2801041d",
         "eventId": "49dcbe2c-51a8-11ee-9348-3cecefd01508",
         "eventType": "TRIP",
         "eventTimeStamp": 1694549374,
         "auditResult": false,
         "auditCorrections": [],
         "auditedTimestamp": 1694635817,
         "auditedBy": "ppradeep@etcc.com",
         "isExcluded": false
      },
      {
         "id": "67a5f5e3-acc8-4965-bf0b-657a6dafbe2e",
         "auditBatchId": "e35fd529-613f-5e79-036f-f37c2801041d",
         "eventId": "724a03aa-51a9-11ee-9348-3cecefd01508",
         "eventType": "TRIP",
         "eventTimeStamp": 1694549871,
         "auditResult": false,
         "auditCorrections": [
            {
               "auditedField": "axle count",
               "originalValue": "3",
               "auditedValue": "4"
            }
         ],
         "auditedTimestamp": 1694636317,
         "auditedBy": "ppradeep@etcc.com",
         "isExcluded": false
      },
      {
         "id": "4f57507e-31ed-4e65-bcb8-6a7d176baece",
         "auditBatchId": "e35fd529-613f-5e79-036f-f37c2801041d",
         "eventId": "c4ef2560-51b1-11ee-9348-3cecefd01508",
         "eventType": "TRIP",
         "eventTimeStamp": 1694553445,
         "auditResult": true,
         "auditCorrections": [
            {
               "auditedField": "axle count",
               "originalValue": "3",
               "auditedValue": "4"
            }
         ],
         "auditedTimestamp": 1694637274,
         "auditedBy": "ppradeep@etcc.com",
         "auditNote": "Bus",
         "isExcluded": false
      },
      {
         "id": "7262657b-9b2a-4fd4-8b6d-fd842df8830e",
         "auditBatchId": "e35fd529-613f-5e79-036f-f37c2801041d",
         "eventId": "03dbfde2-51b8-11ee-9348-3cecefd01508",
         "eventType": "TRIP",
         "eventTimeStamp": 1694556128,
         "auditResult": false,
         "auditCorrections": [
            {
               "auditedField": "axle count",
               "originalValue": "3",
               "auditedValue": "4"
            }
         ],
         "auditedTimestamp": 1694637409,
         "auditedBy": "ppradeep@etcc.com",
         "isExcluded": false
      }
   ]
}

There seems to be some correlation with the value of the field as well. 
if the field-value combination is the same, it skips it.

all three sections highlighted above are 

               "auditedField": "axle count",
               "originalValue": "3",
               "auditedValue": "4"

@bsayed

just keep only this condition as given below 

${f:type() != "MAP" and f:type() != "LIST" and f:type() != "LIST_MAP" }

${str:toLower(str:replaceAll(f:name(), '([A-Z][a-z])', '_$1'))}

For me it works.

@Bikram I've done as you suggested:
 

still same issue:
 

@bsayed 

Please remove the str:upper condition and try.

I am attaching the pipeline , can you please import it and try and check if it helps.

@Bikram 
I did as you suggested:

 

Still the same issue:
 

I tried to import your pipeline:
 

Any other suggestions? is this a bug in version 3.22.0?

@bsayed 

I am not sure if its bug or not in 3.22.0 and i am not sure if i can get the version 3.22.0 or not.

If its there i can try it.

Can you please create a dummy pipeline and send me the pipeline and let me try to import it and check how it behaves.

@Bikram 
Here is the dummy pipeline.
when I preview it, I have the same issue as before:
 

@bsayed 

Issue in the data collector version .

May i know why its very old version you are using :)

@Bikram 
This is just what my company uses, I don't handle the version. 😀 Looks like we need to upgrade however

I tried solving this with a java script evaluator:

var records = sdc.records;
for (var i = 0; i < records.length; i++) {
  try {
    var auditDetailList = records[i].value.auditDetailList.value;
    updateKeysAndPaths(auditDetailList);

    sdc.output.write(records[i]);
  } catch (e) {
    // Send record to error
    sdc.error.write(records[i], e);
  }
}

function updateKeysAndPaths(obj) {
  var stack = [obj];

  while (stack.length > 0) {
    var current = stack.pop();

    if (Array.isArray(current)) {
      current.forEach(function (item) {
        if (typeof item === 'object') {
          stack.push(item);
        }
      });
    } else if (typeof current === 'object') {
      for (var key in current) {
        if (current.hasOwnProperty(key)) {
          var value = current[key];
          if (typeof value === 'object') {
            stack.push(value);
          }

          // Modify keys
          if (key === 'auditedField') {
            current.audited_field = current[key];
            delete current[key];
          } else if (key === 'auditedValue') {
            current.audited_value = current[key];
            delete current[key];
          } else if (key === 'originalValue') {
            current.original_value = current[key];
            delete current[key];
          } else if (key === 'sqpath' || key === 'dqpath') {
            // Update the path as necessary
            current[key] = current[key].replace('auditedField', 'audited_field');
            current[key] = current[key].replace('auditedValue', 'audited_value');
            current[key] = current[key].replace('originalValue', 'original_value');
          }
        }
      }
    }
  }
}

I got it to work in my browser console, however, this doesn't seem to work in streamsets. Is there any other workaround that will solve this issue, other than upgrading versions?

@bsayed 

For now you just go ahead to use the same field mapper twice and proceed further. I will provide you the concrete result tomorrow .

Let me check why its behaving like this , when i am taking your input data , i am also getting the same issue.

Need to do some analysis on it .

@bsayed 

In Streamsets you can use java script processor and use your code which is working fine in your console.

Just give a try.

@Bikram 

Thanks you for your help, its greatly appreciated.

So you have the issue on the imported pipeline I sent you?
If so, then there must be a bug in 3.22.0 that is fixed somewhere along the way to 5.5.0

Also, using 2 field mappers in not a solution, because it only works twice in the same instance of key value pairs. 

ex:
if        
               "auditedField": "axle count",
               "originalValue": "3",
               "auditedValue": "4"

is seen 3 times, then I would need 3 field mappers.
if it is seen 4 times, then I would need 4 field mappers and so on.

Since I cannot guarantee how many instances of the above same key value pairs will exist in a message, adding 2 field mappers doesn't fully solve the issue.

@bsayed 

We can handle it in a different way , i hope it will help you to fix the issue. 

@Bikram 
what is your suggestion to handle it in a different way?

@bsayed 

can you please give a try the attached pipeline and check if it helps

I did the necessary changes in your pipeline.

@Bikram 

Adding the pivoter → mapper is working. Thank you for your help in solving this issue!😀😀😀
Greatly appreciate it.