paleolimbot commented on code in PR #45459:
URL: https://github.com/apache/arrow/pull/45459#discussion_r2007953070


##########
cpp/src/parquet/arrow/schema.cc:
##########
@@ -1088,6 +1114,10 @@ Status ToParquetSchema(const ::arrow::Schema* 
arrow_schema,
                        const WriterProperties& properties,
                        const ArrowWriterProperties& arrow_properties,
                        std::shared_ptr<SchemaDescriptor>* out) {
+  // TODO(paleolimbot): I'm wondering if this geo_crs_context is reused when 
testing
+  // on MINGW, where we get some failures indicating non-empty metadata where 
it was
+  // expected
+  arrow_properties.geo_crs_context()->Clear();

Review Comment:
   I had to add this because a number of tests reused the `arrow_properties` 
(sometimes) so I had to clear this before each walk of the schema. I agree this 
is weird (which is one of the reasons I removed the `GeoCrsContext`).



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