brfrn169 commented on a change in pull request #1889: HDFS-15215 The Timestamp
for longest write/read lock held log is wrong
URL: https://github.com/apache/hadoop/pull/1889#discussion_r391371213
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File path:
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/FakeTimer.java
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@@ -29,17 +29,19 @@
@InterfaceAudience.Private
@InterfaceStability.Unstable
public class FakeTimer extends Timer {
+ private long now;
private long nowNanos;
/** Constructs a FakeTimer with a non-zero value */
public FakeTimer() {
// Initialize with a non-trivial value.
+ now = 1577836800000L; // 2020-01-01 00:00:00,000+0000
Review comment:
Thank you for the comment.
Actually, I think it's more real behavior than original one, because
`Timer.now()` returns the time based on `System.currentTimeMillis()`, and
`Timer.monotonicNow()` and `Timer.monotonicNowNanos()` return the time based on
`System.nanoTime()`, which are different times.
This change is useful to verify the fix in this PR. Also, it doesn't break
the existing tests.
What do you think?
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