spring batch migration from 4.x to 5.x facing unexpected issue while reading JobParameter from ChunkContext

[punitsingh2]

I have one DTO class as below:

@Getter
@Setter
@Data
public class JobDetailsDTO implements Serializable {
    private HashMap<String, HashMap<String, Object>> params;
    
    public void addParam(String paramName, String paramType, Object paramValue) {
        if(params == null) {
            params = new HashMap<>();
        }
        params.put(paramName, new HashMap<String, Object>() {
            {
                put(PARAM_TYPE,paramType.toLowerCase());
                put(PARAM_VALUE,paramValue);
            }
        });
    }

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }
}

here one example how we are building JobParamter

private JobParameters extracted(JobDetailsDTO dto) {
        JobParametersBuilder builder = new JobParametersBuilder();
        Gson gson = new Gson();
        setDefaultProperties(dto);// loading job properties 
        builder.addString("job-params", gson.toJson(dto.getParams()));
        return builder.toJobParameters();
    }

here is my tasklet

@Component
@StepScope
public class MyTasklet implements Tasklet {

    @Override
    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
        Gson gson = new Gson();
        Type listType = new TypeToken<HashMap<String,HashMap<String,Object>>>(){}.getType();
        HashMap<String,HashMap<String,Object>> params = gson.fromJson((String)chunkContext.getStepContext().getJobParameters().get("job-params"), listType);
        //here its is failing with IllegalStateException because when debug this while printing this statement chunkContext.getStepContext().getJobParameters().get("job-params1") 
        // i am getting this **{value={"failOnNonZeroSkipCount":{"paramType":"boolean","paramValue":"false"}}, type=class java.lang.String, identifying=true}** but expection is **{"failOnNonZeroSkipCount":{"paramType":"boolean","paramValue":"false"}}**
        return RepeatStatus.FINISHED;
    }  
}

can you please help me as we are population more than 200 job parameters due this issue we unable to migrate can any one help? if any more input required i can provide

expectation is {"failOnNonZeroSkipCount":{"paramType":"boolean","paramValue":"false"}} instead of this {value={"failOnNonZeroSkipCount":{"paramType":"boolean","paramValue":"false"}}, type=class java.lang.String, identifying=true}

its happening with only two fields one the i have given example second is another DTO having having one field.

even i tried to do poc i unable to replicate even. But our project has huge code base i unable to identify this root case

[fmbenhassine]

I noticed this question was asked on StackOverflow as well. I added an answer there: https://stackoverflow.com/a/77325624/5019386.

Please do not duplicate questions on Github Discussions and StackOverflow to avoid duplicate efforts from the team. Thank you.