Cloud functions for firebase finished with status: 'timeout'

Question

Function gets executed without errors. I am getting the status

Function execution took 60004 ms, finished with status: 'timeout'

I am not sure what the issue is. Everything in my function looks good to me. I also noticed functions sometimes take several seconds to update database and sometimes it is instantly. Is it normal that execution times varies from instantly to couple second? Should execution times be instantly?

exports.countproposals = functions.database.ref("/proposals/{jobid}/{propid}").onWrite((event) => {
    const jobid = event.params.jobid;
    const userId = event.params.propid;
    const userRef = admin.database().ref(`users/${userId}/proposals/sent`);
    if (event.data.exists() && !event.data.previous.exists()) {
        userRef.child(jobid).set({
            timestamp: admin.database.ServerValue.TIMESTAMP
        });
    } else if (!event.data.exists() && event.data.previous.exists()) {
        userRef.child(jobid).remove();
    }
    const collectionRef = admin.database().ref(`/jobs/${jobid}`);
    const countRef = collectionRef.child("proposals");
    return countRef.transaction(current => {
        if (event.data.exists() && !event.data.previous.exists()) {
            return (current || 0) + 1;
        } else if (!event.data.exists() && event.data.previous.exists()) {
            return (current || 0) - 1;
        }
    });
});

Answer 1

From my experience I would guess that this is (hopefully) a temporary problem with firebase function itself. I get the same warnings/error for a function which yesterday took ~200 milliseconds to execute in average.