[BUG] Found 2 Flaky tests in JsonManagedReferenceTest.java

[Mukta13]

Problem Description

Found 2 flaky tests in the file: JsonManagedReferenceTest.java

The tests that were flaky within this file were: testJsonBackReference() and test1().

Environment Info:

• OS： Ubuntu 22.04.5 LTS, Release: 22.04
• JDK： java-17-openjdk-amd64
• Version：Latest version

Steps to reproduce

Run these commands:

mvn -pl core edu.illinois:nondex-maven-plugin:2.1.7:nondex -Dtest=com.alibaba.fastjson2.jackson_support.JsonManagedReferenceTest#testJsonBackReference

mvn -pl core edu.illinois:nondex-maven-plugin:2.1.7:nondex -Dtest=com.alibaba.fastjson2.jackson_support.JsonManagedReferenceTest#test1

The results would be:

Expected Results

The tests should run without non-determinism issue and the build should be successful after running the above commands

Relevant log output

[Mukta13]

Fix in https://github.com/alibaba/fastjson2/pull/3107