Monitoring

Verify Deep Agents Trace Export

View as Markdown

Verify the local collector and downstream backend independently. Deep Agents work continues when export fails, so the agent exit status is not delivery evidence.

Set the Sandbox Name

Set the target sandbox in the host shell:

$export SANDBOX_NAME=my-dcode

Verify Traces End to End

Run a short headless task to generate a managed trace:

$nemo-deepagents "$SANDBOX_NAME" exec -- \
>  dcode -n "Reply with the single word traced."

Confirm that the collector received a trace batch and did not report a downstream exporter error:

$docker logs --since 5m nemoclaw-otel-langsmith 2>&1 | tail -n 100

The basic debug exporter prints a trace count without printing the full payload. Open the project named by $LANGSMITH_PROJECT in the LangSmith UI. Confirm that the new trace is present. Both checks are required because the debug exporter can succeed while the remote exporter fails.

The LangSmith trace should include bounded model inputs and outputs. A representative tool task should also show bounded arguments and results on the tool span. LangGraph node scopes remain operation-only as described in Understand Deep Agents Trace Export.

Troubleshoot Trace Export

Use these checks to isolate each hop. For additional collector diagnostics, refer to Troubleshooting the OpenTelemetry Collector.

SymptomCheck and action
Collector exits at startupRun the validation command again, then inspect docker logs nemoclaw-otel-langsmith. Confirm that the image is the Contrib 0.155.0 image and that all four LANGSMITH_* variables were set when the container was created.
Port 4318 is already allocatedRun ss -ltnp 'sport = :4318' and stop the conflicting listener. The managed sandbox endpoint is fixed, so changing the collector port does not work.
Collector is healthy but logs no trace countRun policy-list and add observability-otlp-local if it is absent. Confirm that docker port shows the current $OTLP_BIND_IP. Run nemo-deepagents <sandbox> rebuild --observability --yes if the sandbox was started without the opt-in.
Collector logs 401Replace an invalid or expired LangSmith API key, then recreate the collector.
Collector logs 403Confirm that the service key can write to the target workspace and that LANGSMITH_WORKSPACE_ID matches that workspace. Organization-scoped service keys require X-Tenant-Id.
Collector logs 404Confirm that LANGSMITH_OTLP_TRACES_ENDPOINT uses the correct US, EU, GCP-hosted APAC, AWS-hosted US, or self-hosted API base and ends in /otel/v1/traces.
Collector logs 429Review LangSmith ingestion and plan limits, then allow the configured queue and retry policy to drain.
Debug exporter logs traces but the LangSmith project is emptyInspect the collector log for remote exporter errors. Verify the endpoint, project, workspace ID, and API key.
Agent succeeds while every trace check failsThis is expected fail-open behavior. Check the policy, receiver bind, collector health, and remote exporter instead of using the agent exit status as delivery evidence.