Redis Cache Reset

[hiimchrislim]

Describe the bug
From time to time, the Redis cache seems to reset/get wiped out which would cause professors to not be able to access the professor page of the application. This can easily be fixed by restarting the service but this is only a temporary workaround.

Expected behavior
The list of professors that we have stored on Redis should persist.

Additional context
We're currently not sure how long it takes for the Redis cache to reset/wipe out but this doesn't happen on a regular basis. This could perhaps be due to reboots that are done on the MCS servers.