Github user frreiss commented on the issue:
https://github.com/apache/spark/pull/15027
@viirya to answer your question re deleting vs moving the files: Deleting
is easier to implement, because once the .crc file is deleted, you can be sure
it won't appear again. Moving the checksum files would be better but would
require tracking down other Spark code that does filesystem operations on the
files later on. These log files are very short by HDFS standards, so the
checksums aren't providing much value anyway.
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