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Posted to issues@flink.apache.org by "testfixer0 (Jira)" <ji...@apache.org> on 2020/02/10 17:26:00 UTC

[jira] [Updated] (FLINK-15975) Use LinkedHashMap for deterministic iterations

     [ https://issues.apache.org/jira/browse/FLINK-15975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

testfixer0 updated FLINK-15975:
-------------------------------
    Attachment: FLINK-15975-000.patch

> Use LinkedHashMap for deterministic iterations
> ----------------------------------------------
>
>                 Key: FLINK-15975
>                 URL: https://issues.apache.org/jira/browse/FLINK-15975
>             Project: Flink
>          Issue Type: Improvement
>          Components: Connectors / Hive
>            Reporter: testfixer0
>            Priority: Minor
>         Attachments: FLINK-15975-000.patch
>
>
> The test `testMap` in `HiveGenericUDFTest` invokes two methods `HiveGenericUDFTest.init` and `HiveScalarFunction.eval`.  These two methods depend on `getConversion` and `toFlinkObject` in class `HiveInspectors`. When the `inspector` is the instance of `MapObjectInspector`, it can return a `HashMap`. However, `HashMap` does not guarantee any specific order of entries. Thus, the test can fail due to a different iteration order.
> In this PR, we propose to use a `LinkedHashMap` instead to guarantee the iteration order.



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