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Posted to issues@flink.apache.org by "Chenguang He (JIRA)" <ji...@apache.org> on 2016/04/18 18:39:25 UTC
[jira] [Commented] (FLINK-2832) Failing test:
RandomSamplerTest.testReservoirSamplerWithReplacement
[ https://issues.apache.org/jira/browse/FLINK-2832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15245967#comment-15245967 ]
Chenguang He commented on FLINK-2832:
-------------------------------------
d value(0.032600) is correct for a sampling with size of 5000.
but p value should be around of 0.5.
btw: the expected fail test with getWrongSampler generates p value around of 0.03, which is close to yours
> Failing test: RandomSamplerTest.testReservoirSamplerWithReplacement
> -------------------------------------------------------------------
>
> Key: FLINK-2832
> URL: https://issues.apache.org/jira/browse/FLINK-2832
> Project: Flink
> Issue Type: Bug
> Components: Tests
> Affects Versions: 0.10.0
> Reporter: Vasia Kalavri
> Priority: Critical
> Labels: test-stability
> Fix For: 1.0.0
>
>
> Tests run: 17, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 19.133 sec <<< FAILURE! - in org.apache.flink.api.java.sampling.RandomSamplerTest
> testReservoirSamplerWithReplacement(org.apache.flink.api.java.sampling.RandomSamplerTest) Time elapsed: 2.534 sec <<< FAILURE!
> java.lang.AssertionError: KS test result with p value(0.110000), d value(0.103090)
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.assertTrue(Assert.java:41)
> at org.apache.flink.api.java.sampling.RandomSamplerTest.verifyKSTest(RandomSamplerTest.java:342)
> at org.apache.flink.api.java.sampling.RandomSamplerTest.verifyRandomSamplerWithSampleSize(RandomSamplerTest.java:330)
> at org.apache.flink.api.java.sampling.RandomSamplerTest.verifyReservoirSamplerWithReplacement(RandomSamplerTest.java:289)
> at org.apache.flink.api.java.sampling.RandomSamplerTest.testReservoirSamplerWithReplacement(RandomSamplerTest.java:192)
> Results :
> Failed tests:
> RandomSamplerTest.testReservoirSamplerWithReplacement:192->verifyReservoirSamplerWithReplacement:289->verifyRandomSamplerWithSampleSize:330->verifyKSTest:342 KS test result with p value(0.110000), d value(0.103090)
> Full log [here|https://travis-ci.org/apache/flink/jobs/84120131].
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