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Posted to common-issues@hadoop.apache.org by "BELUGA BEHR (JIRA)" <ji...@apache.org> on 2018/11/30 23:32:01 UTC
[jira] [Assigned] (HADOOP-15962) FileUtils Small Buffer Size
[ https://issues.apache.org/jira/browse/HADOOP-15962?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
BELUGA BEHR reassigned HADOOP-15962:
------------------------------------
Assignee: BELUGA BEHR
> FileUtils Small Buffer Size
> ---------------------------
>
> Key: HADOOP-15962
> URL: https://issues.apache.org/jira/browse/HADOOP-15962
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Affects Versions: 3.3.0
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Minor
>
> Note sure if this code is even being used, but it implements a copy routing utilizing a 2K buffer. Modern JVM uses 8K, but 4K should be minimum. Also, there are libraries for this stuff.
> {code:java|title=FileUtil.java}
> int count;
> byte data[] = new byte[2048];
> try (BufferedOutputStream outputStream = new BufferedOutputStream(
> new FileOutputStream(outputFile));) {
> while ((count = tis.read(data)) != -1) {
> outputStream.write(data, 0, count);
> }
> outputStream.flush();
> }
> {code}
> I also fixed a couple of check-style warnings.
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