Firebase Unhandled error RangeError: Maximum call stack size exceeded

Question

I\'m calling a Firebase callable function, and returning the promise as specifed by Firebase, but I get this error:

Unhandled error RangeError: Maximum call stack si

Answer 1

Solution for me was to wrap return in a Promise:

exports.getIssue = functions.https.onCall(data => {
const issueKey = data.issueKey

return new Promise((resolve, reject) => {
    admin
        .database()
        .ref('issue')
        .child(issueKey)
        .once('value', snapIssue => {
            let issue = snapIssue.val()
            if (issue) {
                return resolve(issue)
            } else {
                reject('Issue not found')
            }
        })
        .catch(reject)
})