Comment 2 for bug 1648542

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Samuel de Medeiros Queiroz (samueldmq) wrote : Re: keystone does not retry on deadlock Transactions [500 Error]

From the logs it is clear it was a call to delete_user.

I wonder if we should address a more general fix to all operations that need to acquire locks (write operations). From the fix Boris linked, it was an operation related to revocation events. In this case it was a delete user. Tomorrow it is going to be something different.