Root cause analysis:
1. OTEL gRPC endpoint had http:// prefix which is invalid for gRPC
2. SignOz query was targeting wrong table (signoz_metrics.distributed_samples_v4)
3. Should query signoz_traces.distributed_signoz_index_v2 for trace data
Fixes:
- Remove http:// prefix from OTEL_EXPORTER_OTLP_ENDPOINT (gRPC needs host:port)
- Update SignOz client to query traces table instead of metrics table
- Fix timestamp format (nanoseconds for DateTime64(9))
- statusCode: 0=Unset, 1=Ok, 2=Error
This should enable OTEL traces to reach SigNoz and GlobalPulse to show real metrics.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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