CronJob executing several times

I am using cron job to run a task at night only one time but the cron is running multiple times due to which my code gets executed several time. How can I stop this.

`var Job = new CronJob({

cronTime: '* * 01 * * *', //Execute at 1 am every day

onTick  : function() {

    co(function*() {

        yield insertToDatabase(); //this is the function that does insert operation

    }).catch(ex => {

        console.log('error')

    });

},
start   : false,

timeZone: 'Asia/Kolkata'

});`

I have placed the job.start() in the index.js file. Can you please help me figure out what I am doing wrong!

[doowb]

This pattern '* * 01 * * *' is saying “at every second from 01:00:00 to 01:59:59 every day”.

I think you just need to use '00' in place of the minute and second fields: ‘00 00 01 * * *’.

[diptenagile]

I also had the same problem and i notice that server is run on cluster mode. so need to put cronjob in

if(cluster.isMaster){
   // cronjob
}