[jira] [Created] (NIFI-9818) Flaky tests due to HashMap/HashSet in nifi-record

["Jiazhen Xu (Jira)" <ji...@apache.org>]

Jiazhen Xu created NIFI-9818:
--------------------------------

             Summary: Flaky tests due to HashMap/HashSet in nifi-record 
                 Key: NIFI-9818
                 URL: https://issues.apache.org/jira/browse/NIFI-9818
             Project: Apache NiFi
          Issue Type: Bug
            Reporter: Jiazhen Xu


**Description**
Four tests in `nifi-record` (`org.apache.nifi.serialization.record.TestMapRecord#testDefaultValueWithAliasValue` and`org.apache.nifi.serialization.record.TestMapRecord#testAliasConflictingAliasValues`, `org.apache.nifi.serialization.record.TestDataTypeUtils#testInferTypeWithMapStringKeys`, and `org.apache.nifi.serialization.record.TestDataTypeUtils#testInferTypeWithMapNonStringKeys`) can fail due to the non-deterministic order of iteration of _HashMap_ and _HashSet_.

One can manifest this problem using [[NonDex](https://github.com/TestingResearchIllinois/NonDex)](https://github.com/TestingResearchIllinois/NonDex):

```
mvn install -pl nifi-commons/nifi-record -am
mvn -pl nifi-commons/nifi-record edu.illinois:nondex-maven-plugin:1.1.2:nondex -Dtest=org.apache.nifi.serialization.record.TestMapRecord#testAliasConflictingAliasValues
mvn -pl nifi-commons/nifi-record edu.illinois:nondex-maven-plugin:1.1.2:nondex -Dtest=org.apache.nifi.serialization.record.TestMapRecord#testDefaultValueWithAliasValue
mvn -pl nifi-commons/nifi-record edu.illinois:nondex-maven-plugin:1.1.2:nondex -Dtest=org.apache.nifi.serialization.record.TestDataTypeUtils#testInferTypeWithMapStringKeys
mvn -pl nifi-commons/nifi-record edu.illinois:nondex-maven-plugin:1.1.2:nondex -Dtest=org.apache.nifi.serialization.record.TestDataTypeUtils#testInferTypeWithMapNonStringKe
```

**Fix Changes**
Use LinkedHashMap/LinkedHashSet instead of HashMap/HashSet in the test.

 



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