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Posted to dev@flink.apache.org by "testfixer0 (Jira)" <ji...@apache.org> on 2020/02/10 17:22:00 UTC
[jira] [Created] (FLINK-15975) Use LinkedHashMap for deterministic
iterations
testfixer0 created FLINK-15975:
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Summary: 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
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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