Unable to access Token Cache using silent call

[lorcan2025]

We have been fetching Microsoft's access token via normal calls however we were getting throttled due to the huge increase in number of fresh access token calls. On checking we found out that we should use acquire token silently first, and only then fall back to the acquireToken API.
We are using version 1.10.0 and when I tried to implement the silent call, it is unable to fetch tokens from cache and fresh calls are being made.
Our usecase - Whenever there is a file upload, a lambda gets triggered which fetches accessToken from Microsoft and submits the file to Microsoft. At times there are 10k+ files which cause issues as there are 10k requests made to fetch new access tokens. Using cache would help us a lot for such cases.

Code pointer -

The ConfidentialClientApplication is initialised at the very beginning in a static block to avoid it being reinitialised :

[Avery-Dunn]

Hello @lorcan2025 : Could you provide the logs around those 'Acquired token silently' and 'Acquire token from fresh call' messages? In particular, what errors are you getting, and are you seeing messages like "SkipCache set to false. Attempting cache lookup"?

By default, that acquireToken(ClientCredentialParameters) should be fetching tokens from the cache even without that acquireTokenSilently , unless you explicitly tell it to skip the cache, so I'm not sure why it'd be making fresh calls.

Also, when you say you had a "huge increase in number of fresh access token calls", does that mean:

• Your app was getting tokens from the cache, then for some reason something changed and it started getting new tokens?
• Your app was always getting new tokens, but you only noticed after something caused a lot of calls to be made?

[lorcan2025]

Hey @Avery-Dunn
Thanks for the quick reply!
To answer the second question you put, our app was always getting new tokens for each submission and started seeing timeout exceptions when the number of calls increased to Microsoft. On checking online we found out we should try to reuse tokens and not fetch new ones for calls made in very short intervals of time and hence wanted to do the same.

For the logs, since I am unsure where to find those logs, could you share the steps to fetch logs that would help debug what is happening?

[Avery-Dunn]

We use SLF4J for logging, which should allow our logs get printed by whatever your application is using. Check out this page for more info on how to set it up, though the exact instructions will depend on what you're using: https://github.com/AzureAD/microsoft-authentication-library-for-java/wiki/Logging

[Avery-Dunn]

Closing due to inactivity. If you're still having issues or have any other questions, feel free to leave a comment or re-open this thread.