prometheus_mock test fails

[jefchien]

awscollector logs

2021-11-15T16:46:38.844Z info service/collector.go:132 Everything is ready. Begin running and processing data.

panic: runtime error: invalid memory address or nil pointer dereference

[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xcbba3d]


goroutine 86 [running]:

github.com/open-telemetry/opentelemetry-collector-contrib/exporter/awsprometheusremotewriteexporter.(*signingRoundTripper).RoundTrip(0xc000661220, 0xc0007b2b00)

github.com/open-telemetry/opentelemetry-collector-contrib/exporter/awsprometheusremotewriteexporter@v0.38.0/auth.go:47 +0x3d

net/http.send(0xc0007b2a00, {0x3778ea0, 0xc000661220}, {0x31c1f60, 0x4af101, 0x533ab20})

net/http/client.go:252 +0x5d8

net/http.(*Client).send(0xc000824900, 0xc0007b2a00, {0x7f62c12e3518, 0xc000114b20, 0x533ab20})

net/http/client.go:176 +0x9b

net/http.(*Client).do(0xc000824900, 0xc0007b2a00)

net/http/client.go:725 +0x908

net/http.(*Client).Do(...)

net/http/client.go:593

github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusremotewriteexporter.(*PRWExporter).execute(0xc00051f1a0, {0x37e1408, 0xc000500660}, 0x5e9d6a)

github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusremotewriteexporter@v0.38.0/exporter.go:277 +0x4c5

github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusremotewriteexporter.(*PRWExporter).export.func1()

github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusremotewriteexporter@v0.38.0/exporter.go:241 +0xf3

created by github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusremotewriteexporter.(*PRWExporter).export

github.com/open-telemetry/opentelemetry-collector-contrib/exporter/prometheusremotewriteexporter@v0.38.0/exporter.go:237 +0x256

It seems to be an issue with the configuration. Since stopping the sample app and restarting the collector yields the same result.