DataSource issue in spring Batch 5 - mongodb

SodRepository sodRepository; @Bean public ItemReader<Sod> csvFileReader() { FlatFileItemReader<Sod> reader = new FlatFileItemReader<>(); reader.setResource(new ClassPathResource(file)); // Specify your CSV file reader.setLineMapper(new DefaultLineMapper<Sod>() {{ setLineTokenizer(new DelimitedLineTokenizer() {{ setNames(new String[]{"groupCode","original", "conflictsWith", "level", "relationship", "validFrom", "validTo"}); }}); setFieldSetMapper(new BeanWrapperFieldSetMapper<Sod>() {{ setTargetType(Sod.class); }}); }}); return reader; } @Bean public ItemWriter<Sod> mongoItemWriter() { return items -> sodRepository.saveAll(items); } @Bean public Job job(JobRepository jobRepository, PlatformTransactionManager transactionManager) { return new JobBuilder("myJob",jobRepository) .start(step1(jobRepository,transactionManager)) .build(); } @Bean public Step step1(JobRepository jobRepository, PlatformTransactionManager transactionManager) { return new StepBuilder("myStep",jobRepository) .<Sod, Sod>chunk(100) .reader(csvFileReader()) .writer(mongoItemWriter()) .transactionManager(transactionManager) .build(); } and mongo config: @Configuration @EnableConfigurationProperties @EnableMongoRepositories( basePackages = {"com.airtel.africa.ums.client.config"}, mongoTemplateRef = "mongoTemplate" ) @EnableTransactionManagement public class MongoConfig extends AbstractMongoClientConfiguration{ @Value("${spring.data.mongodb.database}") private String databaseName; @Value("${spring.data.mongodb.uri}") private String mongoUrl; @Bean MongoTransactionManager transactionManager(MongoDatabaseFactory dbFactory) { return new MongoTransactionManager(dbFactory); } @Override protected String getDatabaseName() { return databaseName; } @Override public MongoClient mongoClient() { final ConnectionString connectionString = new ConnectionString(mongoUrl); final MongoClientSettings mongoClientSettings = MongoClientSettings.builder() .applyConnectionString(connectionString).build(); return MongoClients.create(mongoClientSettings); } @Bean(name = "mongoTemplate") public MongoTemplate mongoTemplate(MongoDatabaseFactory mongoDatabaseFactory) { return new MongoTemplate(mongoDatabaseFactory); } }