Connecting to the cluster, server selection and writes or reads on a secondary.
driver
Server selection timed out (MongoServerSelectionError, ServerSelectionTimeoutError, MongoTimeoutException)The driver found no suitable server within serverSelectionTimeoutMS: nothing reachable, or no primary for the operation.
10107
NotWritablePrimary: not primary (and 13435 not primary and secondaryOk=false)A write or primary-only command reached a member that is not primary; 13435 is a read on a secondary without a suitable read preference.
6
HostUnreachable: Error connecting to a member, shard or hostA MongoDB server could not reach another member, shard or config server, for example Connection refused.
89
NetworkTimeout: a network operation between MongoDB processes timed outA socket operation, connection attempt or TLS handshake between MongoDB processes ran past its time limit.
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