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https://issues.apache.org/jira/browse/HDFS-15147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17029155#comment-17029155
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Íñigo Goiri commented on HDFS-15147:
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I was also doing the same comparison.
I was focusing on the main offenders (>1 minute).
What I saw is that the timing was pretty random; most cases were slower than 10
minutes but there were faster ones too.
Anyway, I think it is reasonable to move this forward.
> LazyPersistTestCase wait logic is error pruned
> ----------------------------------------------
>
> Key: HDFS-15147
> URL: https://issues.apache.org/jira/browse/HDFS-15147
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Minor
> Attachments: HDFS-15147-branch-2.10.001.patch, HDFS-15147.001.patch,
> HDFS-15147.002.patch, HDFS-15147.003.patch
>
>
> {{LazyPersistTestCase}} has some issues hat lead to inconsistent result of
> the test cases:
> * the wait periods to change of status is too long. It reaches 10 secs in
> some cases.
> * triggerBlockReport() only triggers FBR of DN with index 0. This is counter
> intuitive because the JUnit tests restart the DN assuming that the restarted
> DN will send a FBR. However, this never happens because the DN will get a new
> index post restart.
> {code:java}
> protected final void triggerBlockReport()
> throws IOException, InterruptedException {
> // Trigger block report to NN
> DataNodeTestUtils.triggerBlockReport(cluster.getDataNodes().get(0));
> Thread.sleep(10 * 1000);
> }
> {code}
> [~inigoiri] suggested that we propagate the findings and fixes from
> HDFS-13179 and HDFS-15144 into {{LazyPersistTestCase.java}}. This will
> eventually reduce the runtime and make the test cases more stable.
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