[jira] [Created] (CALCITE-4082) Intermittent failures of RelMetadataTest#testPullUpPredicatesFromUnion2 in Windows

["Stamatis Zampetakis (Jira)" <ji...@apache.org>]

Stamatis Zampetakis created CALCITE-4082:
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             Summary: Intermittent failures of RelMetadataTest#testPullUpPredicatesFromUnion2 in Windows
                 Key: CALCITE-4082
                 URL: https://issues.apache.org/jira/browse/CALCITE-4082
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: Stamatis Zampetakis


The test fails from time to time in Windows since the order of pulled up predicates appears to be different from one execution to the other. 

Locally (on Ubuntu), I cannot reproduce but I've seen it a few times in the [CI|https://github.com/apache/calcite/runs/789868941?check_suite_focus=true#step:4:495].

{noformat}
FAILURE   0.0sec, org.apache.calcite.test.RelMetadataTest > testPullUpPredicatesFromUnion2()
    java.lang.AssertionError: 
    Expected: "[=($0, 1), OR(AND(=($1, 2), =($2, 3)), =($1, 4))]"
         but: was "[=($0, 1), OR(AND(=($2, 3), =($1, 2)), =($1, 4))]"
        at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
        at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:6)
        at org.apache.calcite.test.RelMetadataTest.testPullUpPredicatesFromUnion2(RelMetadataTest.java:2039)
{noformat}




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