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Session Id : 1z6ldwIl+dxdeN/y/icS2S
Power Automate - General Discussion
Answered

Allow 1 instance of a flow to run at the same time

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Posted on 2 Feb 2023 13:08:02 by 153

Allow only 1 instance of a flow to run at the same time

Hello all,
I would like to know if there is a way to avoid the same flow to run while there is another instance of this same flow already running.
Issue - I am running cloud flow while receiving mails with particular subject and writing data to Excel file available in SharePoint, it was running perfectly with single mail but the issue occurred when business sent 20 mails one after another and flow ran 20 times then data is messed and failed.
My flow is 
neerajpokh_0-1675342904033.png

 

my flow takes maximum 30 minutes to complete once, can anyone please help me to run all instances one after another.

Means if one instance will complete in 30 min then other will start after 30 min and all 20 will be succeeded.

 

Please help me on this urgently as client is forcing for this issue.

 

 

  • srduval Profile Picture
    1,683 Moderator on 02 Feb 2023 at 13:27:04
    Re: Allow 1 instance of a flow to run at the same time

    They will all stack up in a "pending" status while the one job is running. They won't fail because of waiting unless you hit the limit on the maximum number of waiting runs. I'm not sure what that limit is I think it has something to do with the amount of actions/memory required to complete the job, as when I ran into an issue the limit varied depending on how complex or not the flow was at any given time. But I was trying to unnest files from a folder and copy to a new folder and had hundreds running at any given time, so I think I just maxed out the allocated memory. 

  • neerajpokh Profile Picture
    153 on 02 Feb 2023 at 13:20:58
    Re: Allow 1 instance of a flow to run at the same time

    Hi @srduval as my flow takes 30 minutes to complete so will other fails after some time or all will be succeeded

  • Verified answer
    srduval Profile Picture
    1,683 Moderator on 02 Feb 2023 at 13:13:29
    Re: Allow 1 instance of a flow to run at the same time

    Under the trigger actions, there is a concurrency limit set that to 1 and all the other tasks will queue up behind it waiting to run until the other finishes. There is a limit as to how many flows can be waiting so keep that in mind

     

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