Hello,

I have written a trigger that is designed to handle leads that come from a specific web-to-lead form and prevent them from becoming duplicates. The trigger allows the new lead to insert and uses its data to query the remaining records for matches on email. If it finds any other Leads or Contacts the util class will update them with the info that was entered in the web-to-lead form, and then delete the lead that came via web-to-lead.

I have deployed this to production and it seems to work well in most cases. However, every once in a while a null ponter exception is thrown, and the incoming lead is prevented from being inserted at all.  The null pointer exception that is thrown is the same exception that was thrown for pretty much every other bug I had to battle through to get this deployed.

With the past occurence of this error I did the following:

When the error is thrown we receive an email from Salesforce that contains all of the data that was submitted via the web-to-lead form(the data we lost because the trigger failed). I took that data and entered it into SF via the user interface exactly as it is in the email. I did this expecting to get the same error, but instead no error was thrown and the code worked as expceted. I then tried entering the same into the web-to-lead form, and the error was thrown.

Does anyone have any ideas why this might be?

trigger leadAfterInsertUpdate on Lead (after insert) {
    
    if(UserInfo.getUserId() <> '00500000006z3qKAAQ'){
        
        Map<String,ID> newLeadsMap = new Map<String,String>();
        
        for(Lead newLead : Trigger.new) {
            if((null != newLead.Email) && (newLead.MarketingCampaign__c == 'Web-Marketing-Opt In Web Page-200807') && (Trigger.isInsert || newLead.Email != Trigger.oldMap.get(newLead.Id).Email)) {
                if(newLeadsMap.containsKey(newLead.Email)) {
                    newLead.Email.addError('Another new lead is already using this email address.');
                }else if (null != newLead.Email){
                    newLeadsMap.put(newLead.Email, newLead.Id);
                }
            }
        }
        
        if(newLeadsMap.keySet().size() > 0) {
            leadHandler.leadDeDuper(newLeadsMap);
        }
    }

}

public class leadHandler {

    Public Static Void leadDeDuper(Map<String,ID> newLeads) {
       
        Map<id,Lead> newLeadMap = new Map <ID, Lead>([Select Id, FirstName, LastName, Phone, PrimaryAreaOfInterest__c, Blog__c, Email, Country_of_Interest__c, HasOptedOutOfEmail,Press_Releases__c,Insights_Newsletter__c,Product_Announcements__c,Marketing_Opt_Out__c from Lead Where ID IN: newLeads.values()]);
        Set<Lead> leadsToDeleteSet = new Set<Lead>();
        List<Lead> existingLeads = new List<Lead>();
        List<Contact> existingContacts = new List<Contact>();
               
        
        //finds existing Leads where their email equals the incoming Lead
       for(Lead leadB : [select Id, FirstName, LastName,PrimaryAreaofInterest__c,Country_of_Interest__c, Phone, Blog__c,Email,HasOptedOutofEmail,Product_Announcements__c, MarketingCampaign__c, Insights_Newsletter__c,Press_Releases__c,Marketing_Opt_Out__c from Lead where Email IN :newLeads.KeySet() And IsConverted = False]) {
          
            for(ID newLeadID : newLeads.values()) {
            	if(newLeadID <> leadB.ID) {
		            //updates fields in existing leads
		            leadB.HasOptedOutOfEmail = false;
		            leadB.Marketing_Opt_Out__c = false;
		            leadB.FirstName = newLeadMap.get(newLeads.get(leadB.email)).FirstName;
		            leadB.PrimaryAreaOfInterest__c = newLeadMap.get(newLeads.get(leadB.email)).PrimaryAreaOfInterest__c;
		            leadB.Press_Releases__c = newLeadMap.get(newLeads.get(leadB.email)).Press_Releases__c;
		            leadB.Insights_Newsletter__c = newLeadMap.get(newLeads.get(leadB.email)).Insights_Newsletter__c;
		            leadB.Product_Announcements__c = newLeadMap.get(newLeads.get(leadB.email)).Product_Announcements__c;
		            leadB.Blog__c =newLeadMap.get(newLeads.get(leadB.email)).Blog__c;
		            leadB.Country_of_Interest__c =newLeadMap.get(newLeads.get(leadB.email)).Country_of_Interest__c;
		            
		            
		            if(null != newLeadMap.get(newLeads.get(leadB.email)).LastName) {
		            	leadB.LastName = newLeadMap.get(newLeads.get(leadB.email)).LastName;
		            }
		            
		            if(null != newLeadMap.get(newLeads.get(leadB.email)).Phone) {
		            	leadB.Phone = newLeadMap.get(newLeads.get(leadB.email)).Phone;
		            }		            
		            
		            if(null == leadB.Rating) {
		            	leadB.Rating = 'Z - Not Contacted - Unknown Quality';
		            }
		            
		            if(null == leadB.Status) {
		            	leadB.Status = 'New Leads - Not Yet Working';
		            }
		            
		            if(leadB.Status == 'Dead Leads - No Future Opport') {
		            	leadB.Status = 'Archived Leads - Possible Future Opport';
		            }
		            
		            if(null == leadB.Lead_Type__c) {
		            	leadB.Lead_Type__c = 'Inbound - Web Form';
		            }
		            
		            if(null == leadB.LeadSource) {
		            	leadB.LeadSource = 'Other';
		            }
		            
		            existingLeads.add(leadB);
            	} else {
            		leadsToDeleteSet.add(newLeadMap.get(newLeads.get(leadB.Email)));
            	}
            }
        }
       
        if(existingLeads.size()>0) {
            update existingLeads;
        }
        //finds existing contacts where their email equals the incoming leads
        for(Contact contactA : [select ID, Name, Email, HasOptedOutofEmail, Insights_Newsletter__c, Press_Releases__c from Contact where Email IN :newLeads.keySet()]) {
                       
            
            //updates the existing contact         
            contactA.HasOptedOutOfEmail = false;
            contactA.Insights_Newsletter__c = newLeadMap.get(newLeads.get(contactA.email)).Insights_Newsletter__c;
            contactA.Press_Releases__c = newLeadMap.get(newLeads.get(contactA.email)).Press_Releases__c;
            contactA.Product_Announcements__c = newLeadMap.get(newLeads.get(contactA.email)).Product_Announcements__c;
            contactA.Blog__c = newLeadMap.get(newLeads.get(contactA.email)).Blog__c;
            contactA.FirstName = newLeadMap.get(newLeads.get(contactA.email)).FirstName;
            contactA.Phone = newLeadMap.get(newLeads.get(contactA.email)).Phone;
            
            if(null != newLeadMap.get(newLeads.get(contactA.email)).LastName) {
            	contactA.LastName = newLeadMap.get(newLeads.get(contactA.email)).LastName;
            }
            
            if(null == contactA.JobFunction__c) {
            	contactA.JobFunction__c = 'Other';
            }
            
            if (null == contactA.ContactType__c) {
            	contactA.ContactType__c = 'Other';
            }
            
            if (null == contactA.NPD_Client_Satisfaction_Survey__c) {
            	contactA.NPD_Client_Satisfaction_Survey__c = 'No';
            }
            
            leadsToDeleteSet.add(newLeadMap.get(newLeads.get(contactA.email)));
            existingContacts.add(contactA);
        }
      
        if(existingContacts.size()>0) {
            update existingContacts;
        }
       
        if(existingLeads.size()>0 || existingContacts.size()>0) {
       
            List<Lead> leadsToDelete = new List<Lead>();
           
            for(Lead leadToDelete : leadsToDeleteSet) {
            	leadsToDelete.add(leadToDelete);
            }
            
            delete leadsToDelete;
    }
       
        }
}