wgtmac commented on code in PR #3269:
URL: https://github.com/apache/parquet-java/pull/3269#discussion_r2298179800
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parquet-hadoop/src/main/java/org/apache/parquet/hadoop/ParquetFileWriter.java:
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@@ -1804,14 +1804,27 @@ private static void copy(SeekableInputStream from,
PositionOutputStream to, long
* @throws IOException if there is an error while writing
*/
public void end(Map<String, String> extraMetaData) throws IOException {
+ final long footerStart = out.getPos();
+
+ // Build the footer metadata) in memory using the helper stream
+ InMemoryPositionOutputStream buffer = new
InMemoryPositionOutputStream(footerStart);
Review Comment:
I don't think so. I believe many OutputStream implementations (especially
FSDataOutputStream) should have already implemented their internal buffers.
Perhaps @steveloughran may correct me if I was wrong.
Even if we want to minimize the IO count, this is the wrong place since it
only contains the footer.
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