Github user felixcheung commented on the issue:

    https://github.com/apache/spark/pull/16330
  
    That would be awesome. One thing to check though, I'm wondering if the 
reason for using a predictable location (current directory) is so that when 
starting another job it would re-use the metastore created before and so have 
access to the tables defined in a previous run? If that is that case, is it ok 
to have it in tempdir - which obviously might disappear?
    
    For instance, each R session has a unique directory that gets clean out 
when the session is terminated (although that tempdir is not currently passed 
to the JVM).



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