How does Reaction event works in AJO Journey? Does it work with Read audience or only events as entry node?

[Phani_Rajesh_Reddy_Manam]

Hello everyone, 

I have a couple of questions related to Reaction events in AJO Journey. The reaction event in my journey is unable to performing the evaluation though i have opened my initial email it is taking down me to the timeout path only. 

1. I don't see my interaction activity of email open is not stitched with my profile, but email send does. Though the ajo email tracking datasets are profile enabled. 
2. Also, am testing the reaction event in test mode, does it works only in live mode of a journey?
3. I have a case scenario after a wait period of 7 days, the email open activity should get checked -and then the email 2 should send, - otherwise the profiles should get the non-open email.
   So if this is something can't be achievable with reaction event. what other options do i have?
   
   i have attached screenshot for reference. please help 

[gengaipandi03]

Reaction can be used in read audience journey as well, Reaction will not work an on event because AEP changed the evaluation method for this message.feedback and message.transaction are batch evaluation instead of streaming data. If it is not working under the journey then we can use the audience directly to exclude it. The attribute called interaction type like the below screenshot, 

[DavidKangni]

Hi @Phani_Rajesh_Reddy_Manam 

1. I don't see my interaction activity of email open is not stitched with my profile, but email send does. Though the ajo email tracking datasets are profile enabled. 
   [David]: give some time or check if you download images. Email opens are tracked using a 0-pixel image included in the email. If email clients (such as Gmail) block images, email opens will not be taken into account.
2. Also, am testing the reaction event in test mode, does it works only in live mode of a journey?
   [David] It's working but make sure you increase your wait time for test mode. When testing a journey that uses a reaction event, the test mode Wait time default and minimum value is 40 seconds and it may not enough to get the feedback before the next activity
3. I have a case scenario after a wait period of 7 days, the email open activity should get checked -and then the email 2 should send, - otherwise the profiles should get the non-open email.
   [David] Email opens are tracked using a 0-pixel image included in the email. If email clients (such as Gmail) block images, email opens will not be taken into account. Also some mailbox, are using Proxies and can cause a "false" open when their servers prefetch the images, leading to a higher and less accurate pixel open rate.
   So if this is something can't be achievable with reaction event. what other options do i have? 
   [David] other option is to use audience but it will be batch.

Thanks,

David