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https://issues.apache.org/jira/browse/CASSANDRA-14106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16288419#comment-16288419
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Jay Zhuang edited comment on CASSANDRA-14106 at 12/12/17 11:32 PM:
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Hi [~bdeggleston], after changing the {{double d}} to {{float d}}, it won't
break stress. In the patch, I also added an unittest to reproduce the issue
introduced by {{lgmt.com}} change.
The problem with {{double}} is: in the last round, the value of {{d}} would be
{{1.0000...004}} instead of {{1.0}}. Which causes the exception
{{OutOfRangeException: 1 out of [0, 1] range}} in cassandra-stress gaussian
distribution.
was (Author: jay.zhuang):
Hi [~bdeggleston], after changing the {{double d}} to {{float d}}, it won't
break stress. In the patch, I also added an unittest to reproduce the issue
introduced by {{lgmt.com}} change.
> utest failed: DistributionSequenceTest.setSeed() and simpleSequence()
> ---------------------------------------------------------------------
>
> Key: CASSANDRA-14106
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14106
> Project: Cassandra
> Issue Type: Bug
> Components: Testing
> Reporter: Jay Zhuang
> Assignee: Jay Zhuang
>
> To reproduce:
> {noformat}
> $ ant stress-test -Dtest.name=DistributionSequenceTest
> {noformat}
> {noformat}
> stress-test:
> [junit] Testsuite:
> org.apache.cassandra.stress.generate.DistributionSequenceTest
> [junit] Testsuite:
> org.apache.cassandra.stress.generate.DistributionSequenceTest Tests run: 4,
> Failures: 2, Errors: 0, Skipped: 0, Time elapsed: 0.08 sec
> [junit]
> [junit] Testcase:
> simpleSequence(org.apache.cassandra.stress.generate.DistributionSequenceTest):
> FAILED
> [junit] expected:<5> but was:<4>
> [junit] junit.framework.AssertionFailedError: expected:<5> but was:<4>
> [junit] at
> org.apache.cassandra.stress.generate.DistributionSequenceTest.simpleSequence(DistributionSequenceTest.java:37)
> [junit]
> [junit]
> [junit] Testcase:
> setSeed(org.apache.cassandra.stress.generate.DistributionSequenceTest):
> FAILED
> [junit] expected:<5> but was:<4>
> [junit] junit.framework.AssertionFailedError: expected:<5> but was:<4>
> [junit] at
> org.apache.cassandra.stress.generate.DistributionSequenceTest.setSeed(DistributionSequenceTest.java:111)
> [junit]
> [junit]
> [junit] Test
> org.apache.cassandra.stress.generate.DistributionSequenceTest FAILED
> {noformat}
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