Ahmed Hussein created HADOOP-17463:
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Summary: 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
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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