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I have 2 or more journeys using same DEs as Entry Source but different entry criteria.
If i create a fire event and trigger that DE, does it differentiate between which Journeys it would trigger contacts injection into. What if I create API Trigger for them.. will it differentiate.

I am asking this because salesforce support has this to say for troubleshooting a journey we were having issues with:

create a new entry event with the same criteria. Upon doing this, you will not encounter issues with the other entries running off of the same data extension. Separate entry events utilize independent highwatermarks.

Further they said this:

The highwatermark is based off of the entry event and not solely the data extension. Each entry contains its own highwatermark.

Pls advise.

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As the support representative correctly advises, if you used the same DE as the Event Source, then the Contacts that you added to the DE will enter all journeys associated with that Event Source, (providing that they meet the Entry Criteria defined within each Event).

Note that each time you add new records to the Event Source DE and fire the Event, then a 'high watermark' will be set, so only new Contacts that are added to the Event Source DE will be injected in the Journey the next time the Event is fired. So, for example, if you have scheduled the Events to run at different times (within the Event), then different high watermarks will be set for each Event, which is nice.

Regarding the 'API Trigger', note that when you use the Events method you have to define the EventDefinitionKey of the Event, so you can't inject a Contact into multiple Journeys from a single request; you would need to make multiple requests. This will still inject them into the respective Journey (based on EventDefinitionKey) and add the record to the Event Source DE, but you might have issues if you try and add a duplicate a record (due to primary key violation). If you just need to inject a Contact into a second journey, then you can use an empty data object in your request payload. If you let me know what exactly you are trying to achieve with the API, I can elaborate further.

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  • Thank you Eliot. We wanted to troubleshoot a journey and the SFMC rep said to create a new entry source for a similar journey and fire the trigger. I believe it would then interfere with other journeys using the same DE. Am i correct? considering we are not using APIs to trigger but a fire event. Jan 20, 2017 at 22:14
  • It shouldn't do, as the high watermark is applied at an event level. Jan 22, 2017 at 9:40
  • FYI, I have tested this and was unable to validate the statement "Separate entry events utilize independent highwatermarks." I created a new Event using an Event Source DE that already had a highwatermark set from a different Event Source, and no Contacts where injected into my new Event/Journey, which makes me believe that a highwatermark is actually global across all Events used by the DE. Feb 1, 2017 at 0:51
  • That could not be possible. Essentially you are saying that if we use --- different journeys and different Entry source for each journey BUT --- each event source is based on same DE, then new journeys would not have any contact injected in to them on fire event. Does not that fail the while purpose of using journeys ? Feb 2, 2017 at 0:19
  • I agree. What I am saying is that this is the behaviour that I am experiencing. I encourage you to validate this yourself. Feb 2, 2017 at 0:56

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