I'm using Database.update method in my batch class. When I run the batch job I intentionally make some error to occur to see how my code handles it. The job completes successfully but the 'finish' method from my batch class is not invoked. Why is this?I'm trying to copy an inactive Account Owner to the Contact Owner field which generates an internal Salesforce Error but the job completes successfully as I'm using Database class method instead of DML statement. I'm unable to see the debug statement of my Finish method in the log. Piece of my code

global void execute(Database.BatchableContext context, List<sObject> scope){
...............................some code
List<Contact> contacts = new List<Contact>();
        contacts.addAll(list_contacts);
        updateResult = Database.update(contacts ,false);
 for (Database.SaveResult ir : updateResult ) {  
        //Operation failed, so get all errors                       
          for(Database.Error err : ir.getErrors()){                                
          System.debug('The following error has occurred -------------'+ err.getStatusCode() + ': ' + err.getMessage());
          System.debug('Task fields that affected this error: ' + err.getFields());
           Error = 'Failed Store --'+ '  ' + ir.getId() + '    ' +err.getStatusCode() ;
           updateErrors.add(Error);             
            }
    }
}

 //Finish Method 
    global void finish(Database.BatchableContext context){
    
    List<String> listOfEmails = new List<String>();
    // Get the AsyncApexJob that represents the Batch job using the Id from the BatchableContext  
       AsyncApexJob a = [Select Id, Status, NumberOfErrors, JobItemsProcessed,TotalJobItems, CreatedBy.Email, ExtendedStatus from AsyncApexJob where Id = :context.getJobId()];  
          
System.debug('********Inside Finish***updateErrors.size()-------'+updateErrors.size());            
                // Email the Batch Job's submitter that the Job is finished.  
                if(updateErrors.size()>0){
                Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();    
                mail.setSubject('Account Sync batch Status: ' + a.Status);  
                String msg = 'The batch Apex job failed to update and Address for'+'   '+updateErrors.size()+ ' '+ 'Contacts' + '  ' + Error;
                mail.setPlainTextBody(msg);  
                List<Email_List__c> receivers = Email_List__c.getall().values();
                for(Email_List__c e:receivers){
                    String s = e.Email_Id__c;
                    listOfEmails.add(s);           
                }
                mail.setToAddresses(listOfEmails);
                Messaging.sendEmail(new Messaging.SingleEmailMessage[] { mail });      
                }
  
    }