I have a script that pulls data from an api every three hours after the initial pull has been made. I noticed that within my execution log there are more runs than I am accounting for. It looks like there are ‘clumps’ of runs every three hours instead of one run every three hours.

I call the delete trigger function at the beginning of my main script to ensure all triggers are deleted, and then call the create trigger function at the end so a trigger is created only if the entire main function was successful.

Any idea why there are multiple executions for one time based trigger?

/** Creates a trigger to run the main function */
function createPullTrigger(){
 //creates a new trigger
  ScriptApp.newTrigger('getData')
    .timeBased()
    .everyHours(3)
    .create();
    
    return;
}
/** Deletes all existing triggers. Apps scripts allows 20 triggers per user,
 * so we don't want to create an overload of triggers.
 */
function deleteAllTriggers(){
  //deletes all triggers that currently exist (if any)
 var triggers = ScriptApp.getProjectTriggers();
 console.log("Existing Triggers: "+triggers.length);
 for (var i = 0; i < triggers.length; i++) {
  console.log('triggers');
  try{
    ScriptApp.deleteTrigger(triggers[i]);
  }
  catch(e){
    console.log('no triggers currently exist');
  }
 }
 return ;
}