"Unknown" distributes and transaction traces coming from Netty

[obenkenobi]

A repro app has been provided that is supposed to replicate the following issues when using both the kotlin coroutines and micronaut extension modules:

• NullPointerException when using R2DBC
• Unknown distributed trace

Please refer to the repro app repository for full details.

UPDATE

The NullPointerException was resolved with the updated coroutines extension module.

The unknown distributed trace seems to be caused by netty and is related to http2 classes that are used.

Possibly relates to #2160

[workato-integration]

https://new-relic.atlassian.net/browse/NR-332358

[obenkenobi]

Related spike with netty that targeted the same issue with unknown distributed traces: #2054