Xinyu Wu created NIFI-9768:
------------------------------
Summary: Indeterminate Map ordering in TestAttributesToCSV
Key: NIFI-9768
URL: https://issues.apache.org/jira/browse/NIFI-9768
Project: Apache NiFi
Issue Type: Bug
Reporter: Xinyu Wu
The test
`org.apache.nifi.processors.standard.TestAttributesToCSV#testSchemaToAttribute`
can fail based on the order of iteration in `HashMap`. I found the issue using
[NonDex](https://github.com/TestingResearchIllinois/NonDex):
```
mvn install -DskipTests -pl
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors -am
mvn -pl nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors
edu.illinois:nondex-maven-plugin:1.1.2:nondex
-Dtest=org.apache.nifi.processors.standard.TestAttributesToCSV#testSchemaToContent
```
The problem can be solved by changing several `HashMap` to `LinkedHashMap`, or
changing the assertion to endure the nondeterministic order.
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