java - Stackoverflow while deleting an entity -

i using eclipse link , want delete entities clause. when doing stackoverflow error. here method use deleteting. wrong in ?

entitymanager em = getentitymanager();        try {              aclentry acle =  new aclentry();             typedquery<aclentry> q = em.createquery("delete  aclentry acle         acle.acl=:acl ", aclentry.class);             q.setparameter("acl", acl);             } catch (exception ex) {             log.throwing("dao", "removeallaclentries", ex);         // em.gettransaction().rollback();         }           {             em.close();        }            }    

here aclenrty entity:

   /*  * change license header, choose license headers in project properties.  * change template file, choose tools | templates  * , open template in editor.  */  package com.cisco.onepk_web.entity;  import java.io.serializable; import java.util.objects; import javax.persistence.entity; import javax.persistence.generatedvalue; import javax.persistence.generationtype; import javax.persistence.id; import javax.persistence.manytoone; import javax.persistence.sequencegenerator;  /**  *  * @author abondar  */ @entity @sequencegenerator(name = "acle_seq", sequencename = "acle_seq", initialvalue = 1, allocationsize=1) public class aclentry implements serializable {   private static final long serialversionuid = 1l;      @generatedvalue(strategy = generationtype.auto, generator="acle_seq")     @id     private long id;      @manytoone(targetentity = acl.class)     private acl acl;      private integer seqnumber;      private string action;        private string protocol;      private string srcaddr;      private string dstaddr;      private string srcwcard;      private string dstwcard;      private integer srcport;      private integer dstport;      public long getid() {         return id;     }      public void setid(long id) {         this.id = id;     }      public acl getacl() {         return acl;     }      public void setacl(acl acl) {         this.acl = acl;     }      public integer getseqnumber() {         return seqnumber;     }      public void setseqnumber(integer seqnumber) {         this.seqnumber = seqnumber;     }      public string getprotocol() {         return protocol;     }      public void setprotocol(string protocol) {         this.protocol = protocol;     }      public string getsrcaddr() {         return srcaddr;     }      public void setsrcaddr(string srcaddr) {         this.srcaddr = srcaddr;     }      public string getdstaddr() {         return dstaddr;     }      public void setdstaddr(string dstaddr) {         this.dstaddr = dstaddr;     }      public string getsrcwcard() {         return srcwcard;     }      public void setsrcwcard(string srcwcard) {         this.srcwcard = srcwcard;     }      public string getdstwcard() {         return dstwcard;     }      public void setdstwcard(string dstwcard) {         this.dstwcard = dstwcard;     }      public integer getsrcport() {         return srcport;     }      public void setsrcport(integer srcport) {         this.srcport = srcport;     }      public integer getdstport() {         return dstport;     }      public void setdstport(integer dstport) {         this.dstport = dstport;     }      public string getaction() {         return action;     }      public void setaction(string action) {         this.action = action;     }       @override     public int hashcode() {         int hash = 5;         hash = 67 * hash + objects.hashcode(this.id);         hash = 67 * hash + objects.hashcode(this.acl);         hash = 67 * hash + objects.hashcode(this.seqnumber);         hash = 67 * hash + objects.hashcode(this.action);          hash = 67 * hash + objects.hashcode(this.protocol);         hash = 67 * hash + objects.hashcode(this.srcaddr);         hash = 67 * hash + objects.hashcode(this.dstaddr);         hash = 67 * hash + objects.hashcode(this.srcwcard);         hash = 67 * hash + objects.hashcode(this.dstwcard);         hash = 67 * hash + objects.hashcode(this.srcport);         hash = 67 * hash + objects.hashcode(this.dstport);         return hash;     }      @override     public boolean equals(object obj) {         if (obj == null) {             return false;         }         if (getclass() != obj.getclass()) {             return false;         }         final aclentry other = (aclentry) obj;         if (!objects.equals(this.id, other.id)) {             return false;         }         if (!objects.equals(this.acl, other.acl)) {             return false;         }         if (!objects.equals(this.seqnumber, other.seqnumber)) {             return false;         }         if (!objects.equals(this.action, other.action)) {             return false;         }          if (!objects.equals(this.protocol, other.protocol)) {             return false;         }         if (!objects.equals(this.srcaddr, other.srcaddr)) {             return false;         }         if (!objects.equals(this.dstaddr, other.dstaddr)) {             return false;         }         if (!objects.equals(this.srcwcard, other.srcwcard)) {             return false;         }         if (!objects.equals(this.dstwcard, other.dstwcard)) {             return false;         }         if (!objects.equals(this.srcport, other.srcport)) {             return false;         }         if (!objects.equals(this.dstport, other.dstport)) {             return false;         }         return true;     }      @override     public string tostring() {         return "aclentry{" + "id=" + id + ", acl=" + acl + ", seqnumber=" + seqnumber + ", action=" + action +  ", protocol=" + protocol + ", srcaddr=" + srcaddr + ", dstaddr=" + dstaddr + ", srcwcard=" + srcwcard + ", dstwcard=" + dstwcard + ", srcport=" + srcport + ", dstport=" + dstport + '}';     }       }