tustvold commented on code in PR #3550:
URL: https://github.com/apache/arrow-rs/pull/3550#discussion_r1073406262
##########
parquet/src/arrow/async_reader/mod.rs:
##########
@@ -199,10 +199,11 @@ impl<T: AsyncRead + AsyncSeek + Unpin + Send>
AsyncFileReader for T {
self.seek(SeekFrom::End(-FOOTER_SIZE_I64 - metadata_len as i64))
.await?;
- let mut buf = Vec::with_capacity(metadata_len);
- self.read_to_end(&mut buf).await?;
+ let mut buf_meta = vec![0_u8; metadata_len];
+ self.read_exact(buf_meta.as_mut_slice()).await?;
+ buf_meta.extend(buf);
Review Comment:
```suggestion
let mut buf_meta = Vec::with_capacity(metadata_len);
self.take(metadata_len as _).read_to_end(&mut buf).await?;
```
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