evict okhttp connections on shutdown

[svalaskevicius]

fixes OkHttp thread not exiting on shutdown:

[E] Non-daemon threads currently preventing JVM termination: - 37: Thread[DestroyJavaVM,5,main]
[E]  -  - 27: Thread[OkHttp localhost Writer,5,main]
[E]  -  - 25: Thread[OkHttp localhost,5,main]

https://square.github.io/okhttp/4.x/okhttp/okhttp3/-ok-http-client/#shutdown-isnt-necessary

Fixes #3900

[codecov]

Codecov Report

Merging #3921 (12f541f) into main (38d0826) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #3921      +/-   ##
============================================
+ Coverage     89.87%   89.90%   +0.02%     
- Complexity     4174     4177       +3     
============================================
  Files           501      501              
  Lines         12753    12761       +8     
  Branches       1218     1218              
============================================
+ Hits          11462    11473      +11     
+ Misses          899      898       -1     
+ Partials        392      390       -2     

Impacted Files	Coverage Δ
...xporter/otlp/internal/grpc/OkHttpGrpcExporter.java	84.37% <100.00%> (+0.16%)	⬆️
.../exporter/otlp/internal/okhttp/OkHttpExporter.java	85.48% <100.00%> (+0.23%)	⬆️
...exporter/otlp/logs/OtlpGrpcLogExporterBuilder.java	83.87% <0.00%> (-8.99%)	⬇️
...etry/sdk/logs/export/BatchLogProcessorBuilder.java	62.50% <0.00%> (-4.17%)	⬇️
...telemetry/sdk/trace/export/BatchSpanProcessor.java	87.94% <0.00%> (-0.71%)	⬇️
...entelemetry/sdk/logs/export/BatchLogProcessor.java	77.35% <0.00%> (ø)
...ntelemetry/sdk/extension/resources/OsResource.java	90.69% <0.00%> (+4.65%)	⬆️
...ava/io/opentelemetry/sdk/internal/RateLimiter.java	100.00% <0.00%> (+5.88%)	⬆️
...metry/sdk/extension/resources/ProcessResource.java	87.50% <0.00%> (+6.25%)	⬆️
...elemetry/sdk/extension/resources/HostResource.java	92.30% <0.00%> (+15.38%)	⬆️
... and 1 more

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[anuraaga]

Thanks! Can you add the same here?

https://github.com/open-telemetry/opentelemetry-java/blob/main/exporters/otlp/common/src/main/java/io/opentelemetry/exporter/otlp/internal/okhttp/OkHttpExporter.java#L130

[anuraaga]

/easycla

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Sarunas Valaskevicius (c733fef)

[anuraaga]

Ah also @svalaskevicius can you sign the CLA?

[svalaskevicius]

Hi. Signed.

The only issue with the cla form is that I think it requires way too much info from me for a single line change :D

Eg I've used my email for the "mailing address" - IANAL, I hope it is OK (the form was accepted).

I'll try to make another pr for the other place linked later when I'm back at laptop, but feel free to add it before I do :)

[anuraaga]

Thanks @svalaskevicius!