Exception in thread "Hibernate Search: identifierloader-1" java.lang.OutOfMemoryError: Java heap space

FullTextSession fts = this.getFullTextSession();
      try{
      MassIndexer msi= fts.createIndexer(PhoneBook.class);
         
         msi.batchSizeToLoadObjects( 50)
         .threadsForSubsequentFetching( 1 )
         .threadsToLoadObjects( 1 )
         .cacheMode(CacheMode.IGNORE)
         .startAndWait();
      }catch(InterruptedException intExc){
         intExc.printStackTrace();
      }

-XX:MaxPermSize=128m
-XX:PermSize=128m

-Xmn100m
-Xms512m
-Xmx1024m

package com.etcbase.cas.model.phonebook;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.ManyToOne;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Transient;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.hibernate.search.annotations.Analyzer;
import org.hibernate.search.annotations.Field;
import org.hibernate.search.annotations.FieldBridge;
import org.hibernate.search.annotations.Index;
import org.hibernate.search.annotations.Indexed;

import com.etcbase.cas.model.lookup.PhoneBookType;
import com.etcbase.cas.util.LookupBridge;
import com.etcbase.sfc.model.common.SfcEntity;
import com.etcbase.sfc.model.lookup.ContactType;
import com.etcbase.sfc.model.lookup.ValidityStatus;

@Entity
@Indexed(index = "phoneBook")
@Analyzer(impl = StandardAnalyzer.class)
@XmlRootElement()
public class PhoneBook extends SfcEntity {

   private static final long serialVersionUID = 2673638618514022474L;

   private PhoneBookType phoneBookType;
   private ContactType contactType;
   private String phoneNumberText;
   private String firstName;
   private String lastName;
   private String cityName;
   private String originalCityName;
   private String districtName;
   private String originalDistrictName;
   private String addressText;
   private ValidityStatus validityStatus;
   private PhoneBookQueue createdByPhoneBookQueue;
   private PhoneBookQueue lastModifiedByPhoneBookQueue;
   private PhoneBookQuery createByPhoneBookQuery;
   private PhoneBookQuery lastModifiedByPhoneBookQuery;
   private Date lastModifiedDateTime;

   @ManyToOne(fetch = FetchType.LAZY)
   @XmlTransient
   public PhoneBookType getPhoneBookType() {
      return phoneBookType;
   }

   @ManyToOne(fetch = FetchType.LAZY)
   @XmlTransient
   public ContactType getContactType() {
      return contactType;
   }

   @Field(name = "phoneNumberText")
   @Column(length = 20)
   public String getPhoneNumberText() {
      return phoneNumberText;
   }

   @Column(length = 80)
   @Field(name = "firstName")
   public String getFirstName() {
      return firstName;
   }

   @Field(name = "lastName")
   public String getLastName() {
      return lastName;
   }

   @Column(length = 20)
   @Field(name = "cityName")
   public String getCityName() {
      return cityName;
   }

   @Column(length = 40)
   @Field(name = "districtName")a
   public String getDistrictName() {
      return districtName;
   }

   @XmlTransient
   public String getAddressText() {
      return addressText;
   }

   @ManyToOne(fetch = FetchType.LAZY)
   @FieldBridge(impl = LookupBridge.class)
   @Field(name = "validityStatus")
   @XmlTransient
   public ValidityStatus getValidityStatus() {
      return validityStatus;
   }

   @ManyToOne(fetch = FetchType.LAZY)
   @XmlTransient
   public PhoneBookQueue getCreatedByPhoneBookQueue() {
      return createdByPhoneBookQueue;
   }

   @ManyToOne(fetch = FetchType.LAZY)
   @XmlTransient
   public PhoneBookQueue getLastModifiedByPhoneBookQueue() {
      return lastModifiedByPhoneBookQueue;
   }

   @Transient
   public String getPhoneBookTypeEnumValue() {
      return this.getPhoneBookType() == null ? null : this.getPhoneBookType().getEnumValue();
   }

   @Transient
   public String getContactTypeEnumValue() {
      return this.getContactType() == null ? null : this.getContactType().getEnumValue();
   }

   @ManyToOne(fetch = FetchType.LAZY)
   @XmlTransient
   public PhoneBookQuery getCreateByPhoneBookQuery() {
      return createByPhoneBookQuery;
   }

   @ManyToOne(fetch = FetchType.LAZY)
   @XmlTransient
   public PhoneBookQuery getLastModifiedByPhoneBookQuery() {
      return lastModifiedByPhoneBookQuery;
   }

   @XmlTransient
   public String getOriginalCityName() {
      return originalCityName;
   }

   @XmlTransient
   public String getOriginalDistrictName() {
      return originalDistrictName;
   }

   @Temporal(TemporalType.TIMESTAMP)
   public Date getLastModifiedDateTime() {
      return lastModifiedDateTime;
   }

   @Override
   @Transient
   @XmlTransient
   public String getUid() {
      return uid;
   }

   @Override
   @Transient
   @XmlTransient
   public Long getId() {
      return super.getId();
   }
   
   
   public void setPhoneBookType(PhoneBookType phoneBookType) {
      this.phoneBookType = phoneBookType;
   }

   public void setContactType(ContactType contactType) {
      this.contactType = contactType;
   }

   public void setPhoneNumberText(String phoneNumberText) {
      this.phoneNumberText = phoneNumberText;
   }

   public void setFirstName(String firstName) {
      this.firstName = firstName;
   }

   public void setLastName(String lastName) {
      this.lastName = lastName;
   }

   public void setCityName(String cityName) {
      this.cityName = cityName;
   }

   public void setDistrictName(String districtName) {
      this.districtName = districtName;
   }

   public void setAddressText(String addressText) {
      this.addressText = addressText;
   }

   public void setValidityStatus(ValidityStatus validityStatus) {
      this.validityStatus = validityStatus;
   }

   public void setCreatedByPhoneBookQueue(PhoneBookQueue createdByPhoneBookQueue) {
      this.createdByPhoneBookQueue = createdByPhoneBookQueue;
   }

   public void setLastModifiedByPhoneBookQueue(PhoneBookQueue lastModifiedByPhoneBookQueue) {
      this.lastModifiedByPhoneBookQueue = lastModifiedByPhoneBookQueue;
   }

   public void setOriginalCityName(String originalCityName) {
      this.originalCityName = originalCityName;
   }

   public void setOriginalDistrictName(String originalDistrictName) {
      this.originalDistrictName = originalDistrictName;
   }

   public void setCreateByPhoneBookQuery(PhoneBookQuery createByPhoneBookQuery) {
      this.createByPhoneBookQuery = createByPhoneBookQuery;
   }

   public void setLastModifiedByPhoneBookQuery(PhoneBookQuery lastModifiedByPhoneBookQuery) {
      this.lastModifiedByPhoneBookQuery = lastModifiedByPhoneBookQuery;
   }

   public void setLastModifiedDateTime(Date lastModifiedDateTime) {
      this.lastModifiedDateTime = lastModifiedDateTime;
   }
}