Github user kiszk commented on the issue:

    https://github.com/apache/spark/pull/18503
  
    @cloud-fan I believe that [this 
failure](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/79048/testReport/)
 occurs since [the checkpoint 
file](https://github.com/apache/spark/blob/master/sql/core/src/test/resources/structured-streaming/checkpoint-version-2.1.0/state/0/1/1.delta)
 does not have a value record whose size is not a multiple of 8 (i.e. 28).
    
    We can solve this failure by regenerating these files. However, the root 
issue is that checkpoint files, whose size may not be a multiple of 8, exist in 
the production environment. Should we resize the value record size for 
`UnsafeRow` to a multiple of 8 if it is not a multiple of 8?
    
    What do you think?


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