Webhook call failed. Error: DEADLINE_EXCEEDED - dialogflow-es

Question

I have written webhook functions in the inline editor.
I get the deadline exceeded error intermittently.
All webhooks which failed with deadline exceeded error has webhook_latency_ms : 4992ms
In Dialogflow documentation (https://cloud.google.com/dialogflow/docs/fulfillment-how) it's mentioned that default timeout is 5sec, as per this my webhook should not throw this error because it's within 5sec.
The webhook has a very simple code that will take no more than 20-30ms.
Most of the time, the same function has webhook_latency_ms: less than 50ms.
What are the factors that could contribute to increased latency?
exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {
const agent = new WebhookClient({ request, response });
function testHandler(agent) {
let pendingHabits = agent.getContext('pendinghabits').parameters.habits;
let message = "Ok, let me know when you complete these habits:";
for (let i = 0; i < pendingHabits.length; i++) {
message = message + "\n" + pendingHabits[i];
}
let payload = {
type: 'message',
isPositive: false,
messages: [{ type: 0, text: message }]
};
agent.add(new Payload(agent.UNSPECIFIED, payload));
}})

Answer 1

You are missing your handler call, as i can see the code you have provided,
const functions = require('firebase-functions');
const {WebhookClient, Card, Suggestion} = require('dialogflow-fulfillment');
exports.dialogflowFirebaseFulfillment = functions.https.onRequest((req, res) => {
const agent = new WebhookClient({ req, res });
function intentHandler(agent) {
agent.add('This message is from Dialogflow\'s Cloud Functions for Firebase editor!');
agent.add(new Card({
title: 'Title: this is a card title',
imageUrl: 'https://developers.google.com/actions/assistant.png',
text: 'This is the body text of a card. You can even use line\n breaks and emoji! 💁',
buttonText: 'This is a button',
buttonUrl: 'https://assistant.google.com/'
})
);
agent.add(new Suggestion('Quick Reply'));
agent.add(new Suggestion('Suggestion'));
}
agent.handleRequest(intentHandler);
});