Github user omalley commented on the issue:
https://github.com/apache/orc/pull/132
Actually, you can't work around it unless you wrap the enum in a separate
message. The problem is that a reader can't tell the difference from the orc
files produced by ORC 1.4 (no writer set) and an unknown writer (writer mapped
to the default). They will both show up as null. You would need to wrap a
message around the enum to make it work.
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