If secrets_readKeys() in secret.c fails (return NULL) MaxScale will keep trying again

If reading file ".secrets" fails for any reason in secrets_readKeys(const char* path), an error message is produced but MaxScale keeps running and will try again later. This continues ad infinitum. For this bug to happen the services must successfully start (using cached passwords?).
Call stack (other stacks are also possible):
secrets_readKeys
decryptPassword
mon_connect_to_db
monitorDatabase
monitorMain
start_thread
clone ()