Avoid exporter related exceptions when application has been shutdown

[geoand]

• Fixes: OpenTelemetry gRPC OTLP traces exporter sometimes throws NPE on app shutdown when HTTP2 connection stream is closed #41351

[quarkus-bot]

/cc @brunobat (opentelemetry), @radcortez (opentelemetry)

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 39fd819.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

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Flaky tests - Develocity

⚙️ JVM Tests - JDK 17

📦 extensions/micrometer/deployment

✖ io.quarkus.micrometer.deployment.binder.VertxConnectionMetricsTest.testConnectionMetrics - History

• event executor terminated - java.util.concurrent.RejectedExecutionException

java.util.concurrent.RejectedExecutionException: event executor terminated
	at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:931)
	at io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:350)
	at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:343)
	at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:833)
	at io.netty.util.concurrent.SingleThreadEventExecutor.execute0(SingleThreadEventExecutor.java:824)
	at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:814)
	at io.vertx.core.impl.EventLoopExecutor.execute(EventLoopExecutor.java:35)

📦 integration-tests/reactive-messaging-kafka

✖ io.quarkus.it.kafka.KafkaConnectorTest.testFruits - History

• Assertion condition defined as a Lambda expression in io.quarkus.it.kafka.KafkaConnectorTest expected: <6> but was: <5> within 10 seconds. - org.awaitility.core.ConditionTimeoutException

org.awaitility.core.ConditionTimeoutException: Assertion condition defined as a Lambda expression in io.quarkus.it.kafka.KafkaConnectorTest expected: <6> but was: <5> within 10 seconds.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:119)
	at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:31)
	at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:1006)
	at org.awaitility.core.ConditionFactory.untilAsserted(ConditionFactory.java:790)
	at io.quarkus.it.kafka.KafkaConnectorTest.testFruits(KafkaConnectorTest.java:63)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)

[gsmet]

LGTM but let's get @brunobat 's approval.

[brunobat]

Makes sense to me. Thanks @geoand

[geoand]

🙏🏼