Liquibase Ci CD

I would like to understand what happens to the liquibase update job when a pod hosting liquibase goes down mid-way. For example, I am adding a new non-null column into an existing table with million records. Since its non-null, I am assigning a default value which will be added to all the million rows. Lets say if the pod goes down after adding new column to 100k rows, what happens to the other 900k rows?