jorisvandenbossche commented on issue #41764:
URL: https://github.com/apache/arrow/issues/41764#issuecomment-2123367801
You can actually reproduce this easily with the new float16 logical type, by
writing it with the latest Arrow:
```python
>>> table = pa.table({"a":np.array([0.1, 0.2], "float16")})
>>> pq.write_table(table, "/tmp/test_float16.parquet")
>>> pq.read_metadata("/tmp/test_float16.parquet").schema
<pyarrow._parquet.ParquetSchema object at 0x7ff5a53d6140>
required group field_id=-1 schema {
optional fixed_len_byte_array(2) field_id=-1 a (Float16);
}
```
and reading that file with an older version:
```python
>>> pq.read_metadata("/tmp/test_float16.parquet").schema
...
OSError: Metadata contains Thrift LogicalType that is not recognized
```
So also regardless of a possible future geometry type, this seems like a
case that could be handled more gracefully.
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