ArraySegment ArgumentException in PrometheusCollectionManager on results write

[artem-voropaev]

Package

OpenTelemetry.Exporter.Prometheus.AspNetCore

Package Version

Package Name	Version
OpenTelemetry	1.9.0
OpenTelemetry.Exporter.Prometheus.AspNetCore	1.9.0-beta.1
OpenTelemetry.Extensions.Hosting	1.9.0
OpenTelemetry.Instrumentation.AspNetCore	1.8.1
OpenTelemetry.Instrumentation.Http	1.8.1
OpenTelemetry.Instrumentation.Process	0.5.0-beta.5
OpenTelemetry.Instrumentation.Runtime	1.8.1

Runtime Version

net6.0

Description

On collect metrics exception thrown in PrometheusCollectionManager
CallStack:
System.ArgumentException: Offset and length were out of bounds for the array or count is greater than the number of elements from index to the end of the source collection. at System.ArraySegment1..ctor(T[] array, Int32 offset, Int32 count)
at OpenTelemetry.Exporter.Prometheus.PrometheusCollectionManager.OnCollect(Batch1 metrics)

Screenshot:

Steps to Reproduce

See Desc.

Expected Result

Metrics returned

Actual Result

After some time, metrics not returned.

Additional Context

No response

[vishweshbankwar]

#5676 should fix this.

[vishweshbankwar]

https://www.nuget.org/packages/OpenTelemetry.Exporter.Prometheus.AspNetCore/1.9.0-beta.2 has the fix