Data Prepper Pipelines + OpenSearch Trace Analytics - amazon-web-services

Question

I'm using the latest version of AWS OpenSearch but somehow, when I'm trying to go to the Trace analytics Dashboard it does not show the traces sent by the Data Prepper.
Manual OpenTelemetry instrumented application
Data Prepper is running in a Docker (opensearchproject/data-prepper:latest)
OpenSearch is running on the latest version
Sample Configuration
data-prepper-config.yaml
ssl: false
pipelines.yaml
entry-pipeline:
delay: "100"
source:
otel_trace_source:
ssl: false
sink:
- pipeline:
name: "raw-pipeline"
- pipeline:
name: "service-map-pipeline"
raw-pipeline:
delay: "100"
source:
pipeline:
name: "entry-pipeline"
processor:
- otel_trace_raw:
sink:
- opensearch:
hosts: [ "https://opensearch-domain" ]
username: "admin"
password: "admin"
index_type: trace-analytics-raw
service-map-pipeline:
delay: "100"
source:
pipeline:
name: "entry-pipeline"
processor:
- service_map_stateful:
sink:
- opensearch:
hosts: ["https://opensearch-domain"]
username: "admin"
password: "admin"
index_type: trace-analytics-service-map
remote-collector.yaml
...
exporters:
otlp/data-prepper:
endpoint: data-prepper-address:21890
service:
pipelines:
traces:
receivers: [otlp]
exporters: [otlp/data-prepper]
When I try to go to the Query Workbench and run the query SELECT * FROM otel-v1-apm-span, I'm getting the list of received trace spans. But I'm unable to see a chart or something on the Trace Analytics Dashboard (both Traces and Services). It's just an empty dashboard.
I'm also getting a warning:
WARN org.opensearch.dataprepper.plugins.processor.oteltrace.OTelTraceRawProcessor - Missing trace group for SpanId: xxxxxxxxxxxx
The traceGroupFields are also empty.
"traceGroupFields": {
"endTime": null,
"durationInNanos": null,
"statusCode": null
}
Is there something wrong with my setup? Any help is appreciated.