SharePoint Memory gates checking failed because the free memory is less than 5% of total memory. As a result, the service will not be available for incoming requests. To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element
This is the one of the strange issue you will find when you deploy your SharePoint App to app domain.
This issue will occur because of the memory issue most of it will be consumed by the SharePoint.
Solution 1:
Open Services wizard :
Go to Start -> type Services.msc
This will launch the services windows there you can find the service with name SharePoint search host controller
Just right click on and Restart ( It will taken around 4-5 mins time ). But it will release all the leaked memory and consumed memory. You can verify the same in memory section from you windows manager just for your verification.
Then Re Deploy your solution this time it will sure go on successfully.
Solution 2:
1.Open IIS by running CTRL+R -> inetmgr
2.Identify the WebService that calling by the web page
3.Right Click -> Explore
4.Edit Web.config file
5.Modify node serviceHostingEnvironment
<serviceHostingEnvironment minFreeMemoryPercentageToActivateService=”1″ />
6.Just save web.config and do a IISRESET
double check your environment.
References:
Suresh Nakka 