OTLP::Exporter#encode - bignum too big to convert into `unsigned long long'

Hi Team,

We are using Ruby 3.2.5 and Rails 7.1.3.3

We have installed below opentelemetry gems
Gemfile

gem "opentelemetry-sdk"
gem "opentelemetry-exporter-otlp"
gem "opentelemetry-instrumentation-all"

and done the sdk configuration in opentelemetry.rb

require 'opentelemetry/sdk'
require 'opentelemetry/instrumentation/all'
require 'opentelemetry-exporter-otlp'

OpenTelemetry::SDK.configure do |c|
  c.service_name = <service_name>
  c.use_all()
  c.add_span_processor(
    OpenTelemetry::SDK::Trace::Export::BatchSpanProcessor.new(
      OpenTelemetry::Exporter::OTLP::Exporter.new
    )
  )
end
MyAppTracer = OpenTelemetry.tracer_provider.tracer(<tracer>)

We have also configured below environment variables

- name: OTEL_EXPORTER
  value: 'otlp'
- name: JAEGER_DISABLED
  value: 'true'
- name: JAEGER_SERVICE_NAME
  value: <service_name>
- name: JAEGER_AGENT_HOST
  valueFrom:
    fieldRef:
      apiVersion: v1
      fieldPath: status.hostIP
- name: OTEL_EXPORTER_OTLP_ENDPOINT
  value: http://$(JAEGER_AGENT_HOST):4318
- name: OTEL_SERVICE_NAME
  value: <service_name>

But we are seeing below errors in pre-prod environment

ERROR -- : OpenTelemetry error: Unable to export 485 spans
ERROR -- : OpenTelemetry error: unexpected error in OTLP::Exporter#encode - bignum too big to convert into `unsigned long long' - /home/circleci/.rubygems/gems/opentelemetry-exporter-otlp-0.29.0/lib/opentelemetry/exporter/otlp/exporter.rb:327:in `initialize'

Start by reproducing the export failure with Ruby 3.2.5, Rails 7.1.3.3, opentelemetry-exporter-otlp 0.29.0, and the shown configuration. Inspect lib/opentelemetry/exporter/otlp/exporter.rb around line 327 and trace the value being converted during OTLP encoding. Done means the reported span batch exports without the bignum conversion error and coverage verifies the case.