There is no information available that could help us help you at the 
moment. Knowing the error in question would be very useful to have an idea 
of what is going on or where the error is located.

You mentioned they have similar code, but they do not have the same code, 
correct? There might be some key differences on how they handle the 
workload. I would also suggest to check the differences between both 
applications code first based on where the error occurs by looking at the 
logs or traces.

Depending on where the errors happens, you would be able to confirm if the 
code is the same in both applications. If it is not, this might be an issue 
specific to the application having the errors.

Without knowing the errors details, here are some things that would be good 
to check if it is related to Cloud Datastore:

- Are the application in the same region? The application within the same 
project of the datastore resources would have the same region although the 
second application might be in a different region that could add some 
latency, if latency is the issue here.

- Workload, is one application receiving more requests than the others? 
Datastore can have hot spotting or contention issue.

See Hotspot: 

https://cloud.google.com/datastore/docs/best-practices#high_readwrite_rates_to_a_narrow_key_range
 


See Contention: 

https://cloud.google.com/appengine/articles/scaling/contention

- Rate of errors, are they happening when there is an increase in traffic, 
this goes in line with the previous check.

I believe this would fall under a more technical issue specific to your 
setup and might be best to you continue with a new thread in Stack 
Overflow[1] by providing your troubleshooting steps you have done and 
relevant information such as the errors in question, your application set 
up such as App Engine or Compute Engine, the runtime, small snippet of the 
log/trace and if relevant, a snippet of the code if the issue seems related 
to the ode and not for example a networking problem like connectivity. Here 
is some guidance for creating a thread in Stackoverflow.

[1] https://cloud.google.com/support/docs/stackexchange   
[2] https://stackoverflow.com/help/how-to-ask 

On Monday, August 6, 2018 at 9:07:30 AM UTC-4, Heisenberg wrote:
>
> Also, the applications were created by someone else and I am just trying 
> to deploy some changes.
>

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