[jira] [Created] (NIFI-10692) Possible Array Ordering Permutations Problem in Tests

["Boyu Li (Jira)" <ji...@apache.org>]

Boyu Li created NIFI-10692:
------------------------------

             Summary: Possible Array Ordering Permutations Problem in Tests
                 Key: NIFI-10692
                 URL: https://issues.apache.org/jira/browse/NIFI-10692
             Project: Apache NiFi
          Issue Type: Test
          Components: NiFi Registry
    Affects Versions: 1.18.0
         Environment: Apache Maven 3.6.3
Java version: 11.0.16, vendor: Ubuntu, runtime: /usr/lib/jvm/java-11-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.4.0-124-generic", arch: "amd64", family: "unix"
            Reporter: Boyu Li


Following the problem of flakiness that occurred in the project
`nifi-nar-bundles/nifi-asn1-bundle/nifi-asn1-services`
test file
`org.apache.nifi.jasn1.TestJASN1RecordReaderWithComplexTypes`
with below three tests
```
testBasicTypes
testRecursive
testInheritance
```
All three above tests use the same file, `JASN1ReadRecordTester` as the tester.
The test flakiness is due to comparisons between two ArrayList outputs from Class
`SimpleRecordSchema` which use ArrayList to store one of the parameter `List<RecordField>`

However, ArrayList does not guarantee entry orders, its object is an unordered set of name/value pairs, and internal permutations may occur in the output as a String.

 

*Steps to reproduce the failure:*
The flakiness was found with [NonDex.|https://github.com/TestingResearchIllinois/NonDex)]
After installing NonDex and run the following code.
{code:java}
cd nifi
mvn install -pl nifi-nar-bundles/nifi-asn1-bundle/nifi-asn1-services -am -DskipTests
mvn -pl nifi-nar-bundles/nifi-asn1-bundle/nifi-asn1-services edu.illinois:nondex- 
  maven-plugin:1.1.3-SNAPSHOT:nondex - 
  Dtest=org.apache.nifi.jasn1.TestJASN1RecordReaderWithComplexTypes#testBasicTypes
{code}



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