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Posted to common-issues@hadoop.apache.org by "Giovanni Matteo Fumarola (JIRA)" <ji...@apache.org> on 2019/04/30 18:41:00 UTC
[jira] [Commented] (HADOOP-16282) AvoidFileStream to improve
performance
[ https://issues.apache.org/jira/browse/HADOOP-16282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16830567#comment-16830567 ]
Giovanni Matteo Fumarola commented on HADOOP-16282:
---------------------------------------------------
Thanks [~ayushtkn] for working on this.
Few questions:
* This change is not clear to me: new PrintStream(new FileOutputStream(new File(filename)), -> new PrintStream(Files.newOutputStream(Paths.get(filename))
* Moving from FileNotFoundException to IOException may have some different results. Can you check if that instruction is the only one that can trigger the exception?
> AvoidFileStream to improve performance
> --------------------------------------
>
> Key: HADOOP-16282
> URL: https://issues.apache.org/jira/browse/HADOOP-16282
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Ayush Saxena
> Assignee: Ayush Saxena
> Priority: Major
> Attachments: HADOOP-16282-01.patch
>
>
> The FileInputStream and FileOutputStream classes contains a finalizer method which will cause garbage collection pauses. See [JDK-8080225|https://bugs.openjdk.java.net/browse/JDK-8080225] for details.
> The FileReader and FileWriter constructors instantiate FileInputStream and FileOutputStream, again causing garbage collection issues while finalizer methods are called.
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