Why you no longer need to run a standalone OpenTelemetry agent alongside FusionReactor.
Historically, achieving full-stack visibility was a balancing act. If you wanted the deep-dive JVM insights, memory analysis, and thread profiling that FusionReactor is famous for, alongside industry-standard OpenTelemetry (OTel) tracing, you had to run two agents side-by-side.
This “dual-agent” approach worked, but it came with a cost: higher CPU and memory overhead, conflicting configurations, and the headache of managing multiple update cycles. While the shift toward a more unified architecture began with our 2025.2.0 release, it has reached its full potential as the established standard in our latest 2026.1.1 version. If you haven’t moved to the modern agent architecture yet, now is the time to streamline your stack.
The Modern Standard: Built-in OTel Shipping
The latest FusionReactor agent is no longer just a monitoring tool; it is a high-performance OpenTelemetry producer. Recent versions include native OTel instrumentation built directly into the core. This means the agent automatically captures and ships FR-native telemetry—including JVM metrics (CPU, GC, heap usage), distributed traces, and logs—directly to OpsPilot without requiring any external assistance.
What This Means for Your Workflow
The transition to a native OTel agent architecture brings three major benefits to your environment:
- Zero-Config Default Behavior: We’ve made getting started as simple as possible. If no OTel endpoint is configured, the agent is pre-set to ship everything automatically. You get world-class observability the moment you attach the agent, with no manual YAML tweaking required.
- Unmatched Flexibility: FusionReactor plays well with others. If your environment already utilizes an OTel Collector or a third-party provider like Datadog, New Relic, Dash0, or Grafana, you don’t have to change your workflow. The FR agent fully respects standard OTel environment variables, including OTEL_EXPORTER_OTLP_ENDPOINT. It simply slides into your existing pipeline.
- Drastic Simplicity: The biggest win is the “agent diet.” You can now safely remove your standalone OTel Java agent. By consolidating into a single agent, you significantly reduce resource overhead on your servers and eliminate the complexity of managing two different sets of instrumentation.
Looking Ahead
By moving to version 2026.1.1, you aren’t just updating software; you’re future-proofing your observability. You get the best of both worlds: the granular, “code-level” diagnostic power of FusionReactor combined with the open-standard portability of OpenTelemetry.
Ready to simplify? Check out our OTel shipping with FusionReactor – FusionReactor Documentation for step-by-step upgrade instructions and example configurations.
