strange mongodb and mongoose error: not master and slaveOk=false error

Question

I\'m getting a strange error in my node.js app

not master and slaveOk=false code 13435

I\'m doing a findOne query using mongoose 4.0.2 hitting a

Answer 1

It is likely your master node failed and you are trying to read from a slave node but by default (and a safety practice such as data synchronization) your reading source is set to primary node only.

You can attach options at the end of your connection string such as ?readPreference=secondary which will use the secondary connection