sentry-java: 4.0.0 Custom Instrumentation spans not working

Platform:

• Android -> If yes, which Device API (and compileSdkVersion/targetSdkVersion/Build tools) version?
• Java -> If yes, which Java (and sourceCompatibility/targetCompatibility) version?
• Kotlin -> If yes, which Kotlin (and jvmTarget) version?
• NDK -> If yes, which NDK/CMake version?
• React-Native -> If yes, which version?
• Timber -> If yes, which version?
• Log4j2 -> If yes, which version?
• Logback -> If yes, which version?
• Spring -> If yes, which version?

IDE:

• Android Studio -> If yes, which version?
• IntelliJ -> If yes, which version?
• Other -> NetBaens 12?

Build system:

• Gradle -> If yes, which version?
• Buck -> If yes, which version?
• Bazel -> If yes, which version?
• Maven -> If yes, which version?
• Other -> If yes, which one?

Android Gradle Plugin:

• Yes -> If yes, which version?
• No

Sentry Android Gradle Plugin:

• Yes -> If yes, which version?
• No

Proguard/R8:

• Enabled
• Disabled

Platform installed with:

• JCenter
• Bintray
• Maven Central
• Manually

The version of the SDK: io.sentry:sentry:4.0.0

---

I have the following issue:

• documentation is not up to date https://docs.sentry.io/platforms/java/performance/custom-instrumentation/
• when using 4.0.0-alpha.3 it was working
• I’m trying to work with spans

Steps to reproduce:

public List<Org> getOrgsFamaly() {        
        ITransaction transaction = Sentry.startTransaction("getOrgsFamaly()");
        transaction.setOperation("famaly");

        List<Org> result = new ArrayList<>();
        result.add(build(4, 2));
        result.add(build(2, 3));

        transaction.finish();
        return result;
}

private Org build(int childrens, int leafs){
        ISpan span = Sentry.getSpan();
       // span is always null
        if(nonNull(span)){
            ISpan innerSpan = span.startChild("famaly", "childes_"+childrens+"::leafs_"+leafs);
            Org org = new Org(childrens, leafs);
            innerSpan.finish();
            return org;
        }

        return null;
    }

Actual result:

• span is always null

Expected result:

• To have spans inside one transaction