andygrove opened a new pull request, #7349:
URL: https://github.com/apache/datafusion-comet/pull/7349

   ## Which issue does this PR close?
   
   Backport of #7335 to `branch-1.2`. #7335 has no issue; it fixes a flaky test 
assertion that failed CI on #7314.
   
   ## Rationale for this change
   
   The `CometParquetWriterSuite` test "an INSERT into a table of the V2 file 
source is written natively through Hadoop" compares the files closed with the 
files created, in order, even though two tasks write them concurrently. 
`branch-1.2` has the same assertion, and it already failed the Spark 4.0, JDK 
21 [scans] job on the backport #7314. Backports to `branch-1.2` keep hitting it 
until the branch gets the fix.
   
   `branch-1.2` is the newest release branch, so no newer branch needs a 
backport. `branch-1.1` doesn't have this test, so it needs no backport either.
   
   ## What changes are included in this PR?
   
   `git cherry-pick -x 36b432c896` of the squash commit of #7335. It applied 
cleanly, and the change matches the source commit. The assertion compares the 
closed and created files as sets.
   
   ## How are these changes tested?
   
   The test itself is the change. `./mvnw test-compile` passes on this branch 
with the default profile, and CI runs the suite.
   


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