In the project, we often use redis to cache query data,
But sometimes, it may be because of an error in redis that the query data fails
Many times, we first check the database and the code itself, ignoring redis
Here, you must remind yourself that when there is no problem with the self-check code, you should test whether redis can be connected normally. The following picture shows that redis is no problem
But if this happens, the data may not be queried because of the problem of redis, as shown below
Such a picture appears to indicate that redis is not connected normally
Doing this solves it:
