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Muhammad Jawwad 16Muhammad Jawwad 16 

Batch Apex: First error: Attempt to de-reference a null object

I'm trying to get associated opportunities to form lead but I'm getting an error: First error: Attempt to de-reference a null object. Please Help
global class testoppty implements Database.Batchable<sObject> {
    public String query = 'SELECT Realtor__c,Realtor__r.Email, ConvertedOpportunityId, Name, Phone,  ' 
                          +  'Status, Loan_Officer_Lookup_Name__c ' 
                          +   ' FROM Lead';
    public EmailTemplate templateId = [Select Id,HtmlValue,Subject from EmailTemplate where name = 'RealtorRecord' LIMIT 1];

    global Database.QueryLocator start(Database.BatchableContext bc) {

        query += ' WHERE CreatedDate = LAST_MONTH  AND Realtor__c != null';
        return Database.getQueryLocator(query);

    global void execute(Database.BatchableContext BC, list<Lead> allLeads) {
        List<String> convertedOppId = new List<String>();
        for(Lead l: allLeads){
        Map<Id, Opportunity> opptyMap = new Map<Id, Opportunity>([SELECT Id,Name,StageName FROM Opportunity WHERE Id IN: convertedOppId ]);  
        Map<Id,List<Lead>> leadMap = new Map<Id,List<Lead>>();
        List<Messaging.SingleEmailMessage> mails = new List<Messaging.SingleEmailMEssage>();
        if(allLeads != null && allLeads.size() > 0){
            for(Lead l: allLeads){
                    leadMap.put(l.Realtor__c, new List<lead>());
        if(leadMap.keySet().size() > 0){
            Map<Id,Contact> officers = new Map<Id,Contact>([SELECT Id,Email,Name FROM Contact WHERE Id IN: leadMap.keySet()]);
            for(Id i: leadMap.keySet()){
                Contact con = officers.get(i);
                    Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
                    mail.setToAddresses(new String[]{con.EMail});
                    String html = templateId.HtmlValue;
                    html = html.replace('||RealtorName||',con.Name);
                    String leadsTable = '<table cellpadding="3" cellspacing="3" width="100%" align="center" border="1" style="border-collapse:collapse;">'+
                        '<tr style="font-weight:bold;"><td>Name</td><td>Phone</td><td>Status</td><td>Loan Officer Name</td></tr>';
                    for(Lead l: leadMap.get(i)){
                        leadsTable += '<tr><td>'+l.Name+'</td>'+
                    leadsTable += '</table>';
                    String opptyTable = '<table cellpadding="3" cellspacing="3" width="100%" align="center" border="1" style="border-collapse:collapse;">'+
                        '<tr style="font-weight:bold;"><td>Name</td><td>Stage Name</td></tr>';
                    for(Lead l: leadMap.get(i)){
                        Opportunity o = opptyMap.get(l.ConvertedOpportunityId);                        
                        opptyTable += '<tr><td>'+o.Name+'</td>'
                    opptyTable += '</table>';
                    html = html.replace('||Leads||',leadsTable);
                    html = html.replace('||Opportunity||',opptyTable);
                    html = html.replace('null',' ');
        if(mails.size() > 0){

    global void finish(Database.BatchableContext BC) {}
Karan KeharKaran Kehar
Hi Muhammad Jawwad ,
Can you tell the line number on which you are getting null pointer? The field realtor on lead -is it a lookup to contact object?
Muhammad Jawwad 16Muhammad Jawwad 16
Error occurs in apex jobs. yes Realtor = lookup(Contact)
Karan KeharKaran Kehar
Hi Muhammad,

In line no.- 17 where you are adding items to convertedOppId list. This is iterationg over allleads list which has leads which dont have convertedopportunityid as the query locator has no filter for converted leads.Due to this list "convertedOppId  " can  null values in it.
If this works, please mark as the best answer!
Muhammad Jawwad 16Muhammad Jawwad 16
How  I get the converted opportunities. Do you please write a code for me?
Karan KeharKaran Kehar
In the query in the start method you can add "where convertedopportunityid != null and isconverted=true"
Muhammad Jawwad 16Muhammad Jawwad 16
There is a problem condition apply on both lead and opportunity.