Crashes when using the Aleph library (built on top of netty)

[HughPowell]

Describe the bug
The binary created by the reproduction repo crashes when using the OpenTelemetry javaagent.

Steps to reproduce

1. Install Clojure
2. Clone the project
3. Build the project clj -T:build uber
4. Download the OpenTelemetry javaagent
5. Run the resulting jar OTEL_TRACES_EXPORTER=logging java -javaagent:opentelemetry-javaagent.jar -jar target/honeycomb-aleph-0.1.2-standalone.jar

Unfortunately it's a Clojure project and my Java-foo isn't strong enough to extract a purely Java project from the code.

What did you expect to see?
The HTML for http://www.example.com printed to the terminal.

What did you see instead?
The following output and exception stack trace

OpenJDK 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended
[otel.javaagent 2022-04-21 11:22:55:997 +1000] [main] INFO io.opentelemetry.javaagent.tooling.VersionLogger - opentelemetry-javaagent - version: 1.13.0
Exception in thread "main" java.lang.NullPointerException
	at io.opentelemetry.javaagent.instrumentation.netty.v4_1.InstrumentedAddressResolverGroup.getResolver(InstrumentedAddressResolverGroup.java:42)
	at io.netty.bootstrap.Bootstrap.doResolveAndConnect0(Bootstrap.java:194)
	at io.netty.bootstrap.Bootstrap.access$000(Bootstrap.java:46)
	at io.netty.bootstrap.Bootstrap$1.operationComplete(Bootstrap.java:180)
	at io.netty.bootstrap.Bootstrap$1.operationComplete(Bootstrap.java:166)
	at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578)
	at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:552)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491)
	at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616)
	at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:605)
	at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:104)
	at io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:84)
	at io.netty.channel.AbstractChannel$AbstractUnsafe.safeSetSuccess(AbstractChannel.java:1012)
	at io.netty.channel.AbstractChannel$AbstractUnsafe.register0(AbstractChannel.java:516)
	at io.netty.channel.AbstractChannel$AbstractUnsafe.access$200(AbstractChannel.java:429)
	at io.netty.channel.AbstractChannel$AbstractUnsafe$1.run(AbstractChannel.java:486)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at manifold.executor$thread_factory$reify__527$f__528.invoke(executor.clj:47)
	at clojure.lang.AFn.run(AFn.java:22)
	at java.base/java.lang.Thread.run(Thread.java:829)
[otel.javaagent 2022-04-21 11:23:07:045 +1000] [OkHttp http://localhost:4317/...] ERROR io.opentelemetry.exporter.internal.grpc.OkHttpGrpcExporter - Failed to export metrics. The request could not be executed. Full error message: Failed to connect to localhost/0:0:0:0:0:0:0:1:4317

What version are you using?
v1.13.0

Environment
All on my laptop
java --version

openjdk 11.0.14.1 2022-02-08
OpenJDK Runtime Environment (build 11.0.14.1+1-Ubuntu-0ubuntu1.21.10)
OpenJDK 64-Bit Server VM (build 11.0.14.1+1-Ubuntu-0ubuntu1.21.10, mixed mode, sharing)

javac --version

javac 11.0.14.1

clj --version

Clojure CLI version 1.10.3.1075

OS & version

Pop!_OS 21.10

[trask]

@HughPowell thanks for reporting this!

[HughPowell]

Amazing! Thanks for the super fast fix.