I think it has something to do with the publickey and that ansible tries to authenticate using the public key as primary method of authentication. For some reason it doesn't takes the username and password and just attempt SSH with it.
I think that because of the log file. -- You received this message because you are subscribed to the Google Groups "Ansible Project" group. To unsubscribe from this group and stop receiving emails from it, send an email to ansible-project+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/db3d5b87-468a-450c-bf37-1a7dc26ec309%40googlegroups.com.
