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Posted to common-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/01/12 15:15:00 UTC
[jira] [Updated] (HADOOP-17463) Replace currentTimeMillis with
monotonicNow in elapsed time
[ https://issues.apache.org/jira/browse/HADOOP-17463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HADOOP-17463:
------------------------------------
Labels: pull-request-available (was: )
> Replace currentTimeMillis with monotonicNow in elapsed time
> -----------------------------------------------------------
>
> Key: HADOOP-17463
> URL: https://issues.apache.org/jira/browse/HADOOP-17463
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> I noticed that there is a widespread incorrect usage of {{System.currentTimeMillis()}} throughout the hadoop code.
> For example:
> {code:java}
> // Some comments here
> long start = System.currentTimeMillis();
> while (System.currentTimeMillis() - start < timeout) {
> // Do something
> }
> {code}
> Elapsed time should be measured using `monotonicNow()`.
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