PekkoHttpServerInstrumentationAsyncHttp2Test."test exception" is flaky

PekkoHttpServerInstrumentationAsyncHttp2Test と HttpServerTest.groovy:1204 で失敗しているテストから始め、記載されている Java バージョンで実行し、trace のアサーションと ListWriter のタイムアウトを調査します。GitLab CI でテストが安定して成功し、期待される例外の trace も引き続き検証できれば完了です。

Tracer Version(s)

1.52.1

Java Version(s)

8, 17, 21

JVM Vendor

Oracle JDK

Bug Report

Failed more than 200 times on GitLab CI on all versions of java and libs (no clear pattern).

PekkoHttpServerInstrumentationAsyncHttp2Test > test exception FAILED
org.spockframework.runtime.ConditionFailedWithExceptionError at HttpServerTest.groovy:1204
Caused by: java.util.concurrent.TimeoutException at ListWriter.java:95

And

Condition failed with Exception:

assertTraces(1) { trace(spanCount(EXCEPTION)) { sortSpansByStart() serverSpan(it, null, null, method, EXCEPTION) if (hasHandlerSpan()) { handlerSpan(it, EXCEPTION) } controllerSpan(it, EXCEPTION) if (hasResponseSpan(EXCEPTION)) { responseSpan(it, EXCEPTION) } trailingSpans(it, EXCEPTION) } }

Condition failed with Exception:

assertTraces(1) { trace(spanCount(EXCEPTION)) { sortSpansByStart() serverSpan(it, null, null, method, EXCEPTION) if (hasHandlerSpan()) { handlerSpan(it, EXCEPTION) } controllerSpan(it, EXCEPTION) if (hasResponseSpan(EXCEPTION)) { responseSpan(it, EXCEPTION) } trailingSpans(it, EXCEPTION) } }

	at datadog.trace.agent.test.base.HttpServerTest.test exception(HttpServerTest.groovy:1204)
Caused by: java.util.concurrent.TimeoutException: Timeout waiting for 1 trace(s). ListWriter.size() == 0 : []
	at datadog.trace.common.writer.ListWriter.waitForTraces(ListWriter.java:95)
	at datadog.trace.agent.test.asserts.ListWriterAssert.assertTraces(ListWriterAssert.groovy:50)
	at datadog.trace.agent.test.asserts.ListWriterAssert.assertTraces(ListWriterAssert.groovy:41)
	at datadog.trace.agent.test.AgentTestRunner.assertTraces(AgentTestRunner.groovy:701)
	at datadog.trace.agent.test.AgentTestRunner.assertTraces(AgentTestRunner.groovy:690)
	... 1 more

Expected Behavior

Test should pass

Reproduction Code

No response