Node js mongoerror 'write ECONNRESET' - node.js

Question

When creating new document in node js gives MongoError of write ECONNRESET.
Following is the error in console when creating the new document:
error: Error adding new agreementTemplate ! Error :
{"name":"MongoError","message":"write ECONNRESET"}
following is the controller function creating the error.
function addSubChapter(req, res) {
logger.debug('Processing request for creating a new agreement.');
console.log(req.body);
async.waterfall([
function (callback) {
agreementService.getAgreementTemplate( callback);
},
function (data, callback) {
agreementTmplService.AgreementTemplateSetDefaultFalse(function(err, result){
callback(null, data);
});
},
function (data, callback) {
var agreementTemplate =data.result[0];
var chapter ={
name: req.body.name
}
agreementTemplate = agreementTemplate.toObject(); // swap for a plain javascript object instance
delete agreementTemplate["_id"];
agreementTemplate.createdBy= req.body.user;
agreementTemplate.created= new Date();
//agreementTemplate.Chapters.push(chapter);
var chapters = agreementTemplate.Chapters;
for(var i=0;i<chapters.length; i++){
if(chapters[i].name == req.body.chapter){
var subChap ={
name: req.body.name
}
chapters[i].subChapters.push(subChap);
}
}
console.log('----------------------');
console.log(agreementTemplate);
agreementService.createAgreementTemplate(agreementTemplate, callback);
},
function (data, callback) {
agreementTmplService.addSubChapter(req.body, callback);
}
], function (err, result) {
utils.processResponse(err, result, res);
});
}
When creating the agreement template it causes the error, here is the service function:
function createAgreementTemplate(data, callback) {
serviceHelper.createModel(AgreementTemplate, 'agreementTemplate', data, callback);
}
and the createModel function is as follows.
function createModel(model, modelName, modelData, callback) {
logger.debug('Creating new Model : %s', modelName);
var modelObj = model(modelData);
modelObj.save(function (err, newModelObj) {
if (err) {
logger.error('Error adding new %s ! Error : %s', modelName, JSON.stringify(err));
callback(utils.handleMongodbError(err), null);
} else {
logger.info('New Model of type : %s created with id : %s', modelName, JSON.stringify(newModelObj._id));
var result = {};
result.status = httpStatus.OK;
result.result = newModelObj._id;
callback(null, result);
}
});
}