opentelemetry-collector: Regression: crash when TLS insecure is set on authenticators

Component(s)

extension/oauth2clientauth

What happened?

Description

Trying to have 2 opentelemetry collectors talk to each other using the oauth2client extension ( agent < > server ).

Steps to Reproduce

Docker compose file

services:
  otel-agent:
    image: otel/opentelemetry-collector-contrib:0.64.1
    container_name: otel-agent
    hostname: secure-otel
    restart: unless-stopped
    ports:
      - 5317:4317
    environment:
      - TZ=Europe/Brussels
    volumes:
      - type: bind
        source: /var/lib/docker/volumes/secure-otel/otel-agent.yml
        target: /etc/otel-collector-config.yaml
        read_only: true
    command: ["--config=/etc/otel-collector-config.yaml"]
    depends_on:
      - otel-server
      
  otel-server:
    image: otel/opentelemetry-collector-contrib:0.64.1
    container_name: otel-server
    hostname: secure-otel
    restart: unless-stopped
    ports:
      - 4317:4317
    environment:
      - TZ=Europe/Brussels
    volumes:
      - type: bind
        source: /var/lib/docker/volumes/secure-otel/otel-server.yml
        target: /etc/otel-collector-config.yaml
        read_only: true
    command: ["--config=/etc/otel-collector-config.yaml"]
    
  tempo:
    image: grafana/tempo:1.5.0
    container_name: tempo
    hostname: secure-otel
    command: [ "-config.file=/etc/tempo.yaml" ]
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /var/lib/docker/volumes/secure-otel/tempo.yml:/etc/tempo.yaml
      - /var/lib/docker/volumes/secure-otel/tempo:/tmp/tempo
    restart: unless-stopped
    ports:
      - 3200:3200  # tempo
      - 4007:4317  # otlp grpc
    depends_on:
      - otel-server

With 2 collector configs defined

Expected Result

Correct data transfer

Actual Result

The opentelemetry configured as agent keeps crashing

Collector version

v0.64.1

Environment information

Environment

OS: Windows with WSL2 Ubuntu

OpenTelemetry Collector configuration

-- agent

extensions:
  oauth2client:
    client_id: ***
    client_secret: ***
    token_url: https://login.microsoftonline.com/***/oauth2/v2.0/token
    scopes: ["api://***/.default"]

receivers:
  otlp:
    protocols:
      grpc:

exporters:
  otlp/auth:
    endpoint: otel-server:4317
    tls:      
      insecure: true
    auth:
      authenticator: oauth2client

service:
  extensions:
    - oauth2client
  pipelines:
    traces:
      receivers:
        - otlp
      exporters:
        - otlp/auth

-- server
extensions:
  oidc:
    issuer_url: https://login.microsoftonline.com/***/v2.0
    audience: ***

receivers:
  otlp/auth:
    protocols:
      grpc:
        auth:
          authenticator: oidc

exporters:
  otlp:
    endpoint: tempo:4007
    tls:
      insecure: true

service:
  extensions:
    - oidc
  pipelines:
    traces:
      receivers:
        - otlp/auth
      exporters:
        - otlp

Log output

2022-11-17T14:46:34.893Z	info	service/telemetry.go:110	Setting up own telemetry...
2022-11-17T14:46:34.893Z	info	service/telemetry.go:140	Serving Prometheus metrics	{"address": ":8888", "level": "basic"}
2022-11-17T14:46:34.894Z	info	service/service.go:89	Starting otelcol-contrib...	{"Version": "0.64.1", "NumCPU": 12}
2022-11-17T14:46:34.894Z	info	extensions/extensions.go:41	Starting extensions...
2022-11-17T14:46:34.894Z	info	extensions/extensions.go:44	Extension is starting...	{"kind": "extension", "name": "oauth2client"}
2022-11-17T14:46:34.894Z	info	extensions/extensions.go:48	Extension started.	{"kind": "extension", "name": "oauth2client"}
2022-11-17T14:46:34.894Z	info	pipelines/pipelines.go:74	Starting exporters...
2022-11-17T14:46:34.894Z	info	pipelines/pipelines.go:78	Exporter is starting...	{"kind": "exporter", "data_type": "traces", "name": "otlp/auth"}
2022-11-17T14:46:34.894Z	info	service/service.go:115	Starting shutdown...
2022-11-17T14:46:34.894Z	info	pipelines/pipelines.go:118	Stopping receivers...
2022-11-17T14:46:34.894Z	info	pipelines/pipelines.go:125	Stopping processors...
2022-11-17T14:46:34.894Z	info	pipelines/pipelines.go:132	Stopping exporters...
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0x9c012b]
goroutine 1 [running]:
google.golang.org/grpc.(*ClientConn).Close(0x0)
	google.golang.org/grpc@v1.50.1/clientconn.go:1016 +0x4b
go.opentelemetry.io/collector/exporter/otlpexporter.(*exporter).shutdown(0xc000997210?, {0x9?, 0x8ce8401?})
	go.opentelemetry.io/collector/exporter/otlpexporter@v0.64.1/otlp.go:93 +0x1d
go.opentelemetry.io/collector/component.ShutdownFunc.Shutdown(...)
	go.opentelemetry.io/collector@v0.64.1/component/component.go:91
go.opentelemetry.io/collector/exporter/exporterhelper.newBaseExporter.func2({0x74b9640, 0xc0000bc018})
	go.opentelemetry.io/collector@v0.64.1/exporter/exporterhelper/common.go:177 +0x5a
go.opentelemetry.io/collector/component.ShutdownFunc.Shutdown(...)
	go.opentelemetry.io/collector@v0.64.1/component/component.go:91
go.opentelemetry.io/collector/service/internal/pipelines.(*Pipelines).ShutdownAll(0xc000d36050, {0x74b9640, 0xc0000bc018})
	go.opentelemetry.io/collector@v0.64.1/service/internal/pipelines/pipelines.go:135 +0x36b
go.opentelemetry.io/collector/service.(*service).Shutdown(0xc00039b200, {0x74b9640, 0xc0000bc018})
	go.opentelemetry.io/collector@v0.64.1/service/service.go:121 +0xd4
go.opentelemetry.io/collector/service.(*Collector).shutdownServiceAndTelemetry(0xc0013c5a88, {0x74b9640?, 0xc0000bc018?})
	go.opentelemetry.io/collector@v0.64.1/service/collector.go:234 +0x36
go.opentelemetry.io/collector/service.(*Collector).setupConfigurationComponents(0xc0013c5a88, {0x74b9640, 0xc0000bc018})
	go.opentelemetry.io/collector@v0.64.1/service/collector.go:155 +0x286
go.opentelemetry.io/collector/service.(*Collector).Run(0xc0013c5a88, {0x74b9640, 0xc0000bc018})
	go.opentelemetry.io/collector@v0.64.1/service/collector.go:164 +0x46
go.opentelemetry.io/collector/service.NewCommand.func1(0xc00058cf00, {0x680c260?, 0x1?, 0x1?})
	go.opentelemetry.io/collector@v0.64.1/service/command.go:53 +0x479
github.com/spf13/cobra.(*Command).execute(0xc00058cf00, {0xc0000b4050, 0x1, 0x1})
	github.com/spf13/cobra@v1.6.1/command.go:916 +0x862
github.com/spf13/cobra.(*Command).ExecuteC(0xc00058cf00)
	github.com/spf13/cobra@v1.6.1/command.go:1044 +0x3bd
github.com/spf13/cobra.(*Command).Execute(...)
	github.com/spf13/cobra@v1.6.1/command.go:968
main.runInteractive({{0xc000991860, 0xc0009b8a50, 0xc000991c80, 0xc000991500}, {{0x6833f67, 0xf}, {0x68af92d, 0x1f}, {0x6805d6e, 0x6}}, ...})
	github.com/open-telemetry/opentelemetry-collector-releases/contrib/main.go:32 +0x5d
main.run(...)
	github.com/open-telemetry/opentelemetry-collector-releases/contrib/main_others.go:11
main.main()
	github.com/open-telemetry/opentelemetry-collector-releases/contrib/main.go:25 +0x1d8

Additional context

No response