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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