[MAHOUT-1411] Random test failures from TDigestTest

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.8
• Fix Version/s: 0.9
• Component/s: classic
• Assignee: Suneel Marthi
• Reporter: Suneel Marthi
• Created: 28/Jan/14 18:35
• Updated: 31/Jan/24 22:16
• Resolved: 28/Jan/14 18:42

Description

Seeing random test failures like below from TDigestTest. These errors are not repeatable.

testUniform(org.apache.mahout.math.stats.TDigestTest)  Time elapsed: 0.356 sec  <<< FAILURE!
java.lang.AssertionError: expected:<0.5> but was:<0.50578>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:743)
	at org.junit.Assert.assertEquals(Assert.java:494)
	at org.junit.Assert.assertEquals(Assert.java:592)
	at org.apache.mahout.math.stats.TDigestTest.runTest(TDigestTest.java:373)
	at org.apache.mahout.math.stats.TDigestTest.testUniform(TDigestTest.java:79)

Results :

Failed tests: 
  TDigestTest.testUniform:79->runTest:373 expected:<0.5> but was:<0.50578>

Tests run: 9, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 40.063 sec
<<< FAILURE! - in org.apache.mahout.math.stats.TDigestTest
testSequentialPoints(org.apache.mahout.math.stats.TDigestTest)  Time
elapsed: 4.674 sec  <<< FAILURE!
java.lang.AssertionError: expected:<0.5> but was:<0.49489>