I am getting below error when I try to use @Async annotation.
java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
Code:
@Async
@Override
@Transactional
public void triggerEmailCommunication(List<String> eventCode, Integer authorizationId, Integer claimId,
        boolean callMethod) {
    Map<String, Object> emailBody = new HashMap<>();
    try {
        if (callMethod) {
            LOGGER.info("Communication async flow triggerEmailCommunication method starts.");
            emailBody = emailBodyObject(authorizationId, claimId, eventCode);
  }
private Map<String, Object> emailBodyObject(Integer authorizationId, Integer claimId, List<String> eventCode)
        throws CareBusinessServiceException {
    LOGGER.info("EmailBodyObject method starts.");
    Map<String, Object> emailBody = new HashMap<String, Object>();
    EmailClaimDetailsVO emailClaimDetails = new EmailClaimDetailsVO();
    ClaimAuthorizationVO claimAuthVO = new ClaimAuthorizationVO();
    Claim claim = new Claim();
    Authorization authorization = new Authorization();
    List<String> rejectReasonList = new ArrayList<>();
    Provider provider = new Provider();
    String providerName = null;
    String claimIntimationNbr = null;
    String authorizationNbr = null;
    SimpleDateFormat formatter = new SimpleDateFormat(AmhiConstants.DATE_FORMAT_DD_MM_YYYY);
    try {
        Integer claimIntimationId = null;
        if (null != claimId) {
            claim = enableBusinessService.retrieveClaimDetails(claimId);
     } catch(Exception e) {
     }
}
DAO Layer
@Override
public Claim retrieveClaimIdRecord(Integer claimId) {
    CriteriaBuilder builder = manager.getCriteriaBuilder();
    CriteriaQuery<Claim> criteriaQuery = builder.createQuery(Claim.class);
    Root<Claim> root = criteriaQuery.from(Claim.class);
    ArrayList<Predicate> conditions = new ArrayList<>();
    conditions.add(builder.equal(root.get(Claim_.claimId), claimId));
    criteriaQuery.select(root).where(conditions.toArray(new Predicate[] {}));
    javax.persistence.Query query = manager.createQuery(criteriaQuery);
    List<Claim> claims = query.getResultList();
    if(CollectionUtils.isNotEmpty(claims)){
        return claims.get(0);
    }
    return new Claim();
}
The value is getting retrieved from DB. But I am getting above exception as mentioned.