Firebase Cloud Function with Firestore returning “Deadline Exceeded”

Question

I took one of the sample functions from the Firestore documentation and was able to successfully run it from my local firebase environment. However, once I deployed to my fi

Answer 1

If the error is generate after around 10 seconds, probably it's not your internet connetion, it might be that your functions are not returning any promise. In my experience I got the error simply because I had wrapped a firebase set operation(which returns a promise) inside another promise. You can do this

return db.collection("COL_NAME").doc("DOC_NAME").set(attribs).then(ref => {
        var SuccessResponse = {
            "code": "200"
        }

        var resp = JSON.stringify(SuccessResponse);
        return resp;
    }).catch(err => {
        console.log('Quiz Error OCCURED ', err);
        var FailureResponse = {
            "code": "400",
        }

        var resp = JSON.stringify(FailureResponse);
        return resp;
    });

instead of

return new Promise((resolve,reject)=>{ 
    db.collection("COL_NAME").doc("DOC_NAME").set(attribs).then(ref => {
        var SuccessResponse = {
            "code": "200"
        }

        var resp = JSON.stringify(SuccessResponse);
        return resp;
    }).catch(err => {
        console.log('Quiz Error OCCURED ', err);
        var FailureResponse = {
            "code": "400",
        }

        var resp = JSON.stringify(FailureResponse);
        return resp;
    });

});