Request processing failed; nested exception is org.hibernate.type.SerializationException: could not deserialize

Question

This is my model class.when ruing my spring project it given this error Request processing failed; nested exception is org.hibernate.type.SerializationException: could not deserialize. I did several solution but same error will given.Is any one can find what are the reason for getting that kind of error this is my model class...

> import java.io.Serializable; import java.util.Date;
> 
> import javax.persistence.Basic; import javax.persistence.Column;
> import javax.persistence.Entity; import javax.persistence.FetchType;
> import javax.persistence.GeneratedValue; import
> javax.persistence.GenerationType; import javax.persistence.Id; import
> javax.persistence.JoinColumn; import javax.persistence.ManyToOne;
> import javax.persistence.NamedQueries; import
> javax.persistence.NamedQuery; import
> javax.persistence.SequenceGenerator; import javax.persistence.Table;
> import javax.persistence.Temporal; import
> javax.persistence.TemporalType; import
> javax.xml.bind.annotation.XmlRootElement;
> 
> 
> @Entity @Table(name = "season_types" , schema = "unipointmain")
> @XmlRootElement @NamedQueries({
>     @NamedQuery(name = "SeasonTypes.findAll", query = "SELECT s FROM SeasonTypes s"),
>     @NamedQuery(name = "SeasonTypes.findBySeasonName", query = "SELECT s FROM SeasonTypes s WHERE s.seasonName = :seasonName"),
>     @NamedQuery(name = "SeasonTypes.findBySeasonId", query = "SELECT s FROM SeasonTypes s WHERE s.seasonId = :seasonId"),
>     @NamedQuery(name = "SeasonTypes.findByStartDate", query = "SELECT s FROM SeasonTypes s WHERE s.startDate = :startDate"),
>     @NamedQuery(name = "SeasonTypes.findByEndDate", query = "SELECT s FROM SeasonTypes s WHERE s.endDate = :endDate"),
>     @NamedQuery(name = "SeasonTypes.findByComment", query = "SELECT s FROM SeasonTypes s WHERE s.comment = :comment")}) public class
> SeasonTypes implements Serializable {
>     private static final long serialVersionUID = 1L;
>     @Column(name = "season_name")
>     private String seasonName;
>     @Id //    @SequenceGenerator(name="pk_sequence",sequenceName="unipointmain.season_types_pk_seq",
> allocationSize=1)
> //    @GeneratedValue(strategy=GenerationType.SEQUENCE,generator="pk_sequence")
>     @GeneratedValue(strategy = GenerationType.SEQUENCE, generator="season_types_pk_seq")
>     @SequenceGenerator(name="season_types_pk_seq", sequenceName="unipointmain.season_types_pk_seq", allocationSize=1)
>     @Column(name = "season_id")
>     private Integer seasonId;
>     
>     @Column(name = "merchant_ref_id")     private Merchant merchant;
>     @ManyToOne(fetch = FetchType.LAZY)    @JoinColumn(name = "merchant_ref_id")
>     public Merchant getMerchant() {       return merchant;    }   public void setMerchant(Merchant merchant) {        this.merchant = merchant;   }
> 
>   @Column(name = "start_date")
>     private String startDate;
>     @Column(name = "end_date")
>     private String endDate;
>     @Column(name = "comment")
>     private String comment;
>     @JoinColumn(name = "offer_id", referencedColumnName = "offerid")
>     @ManyToOne
>     private Offer offerId;
>    
> 
>     public SeasonTypes() {
>     }
>     public SeasonTypes(Integer seasonId) {
>        this.seasonId = seasonId;
>     }
> 
>     public String getSeasonName() {
>         return seasonName;
>     }
> 
>     public void setSeasonName(String seasonName) {
>         this.seasonName = seasonName;
>     }
> 
>     public Integer getSeasonId() {
>         return seasonId;
>     }
> 
>     public void setSeasonId(Integer seasonId) {
>         this.seasonId = seasonId;
>     }
> 
>     public String getStartDate() {
>         return startDate;
>     }
> 
>     public void setStartDate(String startDate) {
>         this.startDate = startDate;
>     }
> 
>     public String getEndDate() {
>         return endDate;
>     }
> 
>     public void setEndDate(String endDate) {
>         this.endDate = endDate;
>     }
> 
>     public String getComment() {
>         return comment;
>     }
> 
>     public void setComment(String comment) {
>         this.comment = comment;
>     }
> 
>     public Offer getOfferId() {
>         return offerId;
>     }
> 
>     public void setOfferId(Offer offerId) {
>         this.offerId = offerId;
>     }
> 
>     @Override
>     public int hashCode() {
>         int hash = 0;
>         hash += (seasonId != null ? seasonId.hashCode() : 0);
>         return hash;
>     }
> 
>     @Override
>     public boolean equals(Object object) {
>         // TODO: Warning - this method won't work in the case the id fields are not set
>         if (!(object instanceof SeasonTypes)) {
>             return false;
>         }
>         SeasonTypes other = (SeasonTypes) object;
>         if ((this.seasonId == null && other.seasonId != null) || (this.seasonId != null && !this.seasonId.equals(other.seasonId))) {
>             return false;
>         }
>         return true;
>     }
> 
>     @Override
>     public String toString() {
>         return "com.unipoint.test.SeasonTypes[ seasonId=" + seasonId + " ]";
>     }
>     
>      }

Answer 1

Your class has to be serializable, as well as any classes that are given as arguments to your class. Your issue probably lies Merchant or Offer not implementing the serializable interface.

Hope this helps