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https://issues.apache.org/jira/browse/YARN-3726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Varun Saxena updated YARN-3726:
-------------------------------
Fix Version/s: 2.9.0
> Fix TestHBaseTimelineWriterImpl unit test failure by fixing it's test data
> --------------------------------------------------------------------------
>
> Key: YARN-3726
> URL: https://issues.apache.org/jira/browse/YARN-3726
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Reporter: Vrushali C
> Assignee: Vrushali C
> Fix For: 2.9.0, 3.0.0-alpha1
>
> Attachments: YARN-3726-YARN-2928.001.patch
>
>
> There is a very fascinating bug that was introduced by the test data in the
> metrics time series check in the unit test in TestHBaseTimelineWriterImpl in
> YARN-3411.
> The unit test failure seen is
> {code}
> Error Message
> expected:<1> but was:<6>
> Stacktrace
> java.lang.AssertionError: expected:<1> but was:<6>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotEquals(Assert.java:743)
> at org.junit.Assert.assertEquals(Assert.java:118)
> at org.junit.Assert.assertEquals(Assert.java:555)
> at org.junit.Assert.assertEquals(Assert.java:542)
> at
> org.apache.hadoop.yarn.server.timelineservice.storage.TestHBaseTimelineWriterImpl.checkMetricsTimeseries(TestHBaseTimelineWriterImpl.java:219)
> at
> org.apache.hadoop.yarn.server.timelineservice.storage.TestHBaseTimelineWriterImpl.testWriteEntityToHBase(TestHBaseTimelineWriterImpl.java:204)
> {code}
> The test data had 6 timestamps that belonged to 22nd April 2015. When the
> patch in YARN-3411 was submitted and tested by Hadoop QA on May 19th, the
> unit test was working fine. Fast forward a few more days and the test started
> failing. There has been no relevant code change or package version change
> interim. The change that is triggering the unit test failure is the passage
> of time.
> The reason for test failure is that the metrics time series data lives in a
> column family which has a TTL set to 30 days. Metrics time series data was
> written to the mini hbase cluster with cell timestamps set to April 22nd.
> Based on the column family configuration, hbase started deleting the data
> that was older than 30 days and the test started failing. The last value is
> retained, hence there is one value fetched from hbase.
> Will submit a patch with the test case fixed shortly.
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