`IntegrationTestGetContent.getContentResponse()` is flaky

[lorban]

Jetty version(s)
12.1.x

Jetty Environment
ee9

Description
org.eclipse.jetty.ee9.maven.plugin.it.IntegrationTestGetContent.getContentResponse() somestimes fails with:

java.util.concurrent.ExecutionException: java.io.EOFException: oejcti.HttpConnectionOverHTTP@226126b4::oeji.SocketChannelEndPoint@1a1c1c5a[{l=/127.0.0.1:38528,r=localhost/127.0.0.1:32947,ISHUT,fill=-,flush=-,to=0/30000}{io=0/0,kio=0,kro=1}]->[oejcti.HttpConnectionOverHTTP@226126b4(l:/127.0.0.1:38528 <-> r:localhost/127.0.0.1:32947,closed=false)=>oejcti.HttpChannelOverHTTP@a7cf098(exchange=HttpExchange@5de67052{req=oejct.HttpRequest[GET /setbycontextxml/hello HTTP/1.1]@5fe8941b[TERMINATED/null] res=HttpResponse[null 0 null]@6a96695[PENDING/null]})[send=oejcti.HttpSenderOverHTTP@6b3cbee8(req=QUEUED,failure=null)[oejh.HttpGenerator@536273d{s=START}],recv=oejcti.HttpReceiverOverHTTP@1ee533cc(ex=HttpExchange@5de67052{req=oejct.HttpRequest[GET /setbycontextxml/hello HTTP/1.1]@5fe8941b[TERMINATED/null] res=HttpResponse[null 0 null]@6a96695[PENDING/null]},rsp=IDLE,failure=null)[oejh.HttpParser{s=CLOSED,0 of -1}]]]
	at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396)
	at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2073)
	at org.eclipse.jetty.client.transport.HttpRequest.send(HttpRequest.java:731)
	at org.eclipse.jetty.client.HttpClient.GET(HttpClient.java:379)
	at org.eclipse.jetty.client.HttpClient.GET(HttpClient.java:364)
	at org.eclipse.jetty.ee9.maven.plugin.it.IntegrationTestGetContent.getContentResponse(IntegrationTestGetContent.java:53)
Caused by: java.io.EOFException: oejcti.HttpConnectionOverHTTP@226126b4::oeji.SocketChannelEndPoint@1a1c1c5a[{l=/127.0.0.1:38528,r=localhost/127.0.0.1:32947,ISHUT,fill=-,flush=-,to=0/30000}{io=0/0,kio=0,kro=1}]->[oejcti.HttpConnectionOverHTTP@226126b4(l:/127.0.0.1:38528 <-> r:localhost/127.0.0.1:32947,closed=false)=>oejcti.HttpChannelOverHTTP@a7cf098(exchange=HttpExchange@5de67052{req=oejct.HttpRequest[GET /setbycontextxml/hello HTTP/1.1]@5fe8941b[TERMINATED/null] res=HttpResponse[null 0 null]@6a96695[PENDING/null]})[send=oejcti.HttpSenderOverHTTP@6b3cbee8(req=QUEUED,failure=null)[oejh.HttpGenerator@536273d{s=START}],recv=oejcti.HttpReceiverOverHTTP@1ee533cc(ex=HttpExchange@5de67052{req=oejct.HttpRequest[GET /setbycontextxml/hello HTTP/1.1]@5fe8941b[TERMINATED/null] res=HttpResponse[null 0 null]@6a96695[PENDING/null]},rsp=IDLE,failure=null)[oejh.HttpParser{s=CLOSED,0 of -1}]]]
	at org.eclipse.jetty.client.transport.internal.HttpReceiverOverHTTP.earlyEOF(HttpReceiverOverHTTP.java:550)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:1805)
	at org.eclipse.jetty.client.transport.internal.HttpReceiverOverHTTP.parse(HttpReceiverOverHTTP.java:323)
	at org.eclipse.jetty.client.transport.internal.HttpReceiverOverHTTP.parseAndFill(HttpReceiverOverHTTP.java:252)
	at org.eclipse.jetty.client.transport.internal.HttpReceiverOverHTTP.receive(HttpReceiverOverHTTP.java:85)
	at org.eclipse.jetty.client.transport.internal.HttpChannelOverHTTP.receive(HttpChannelOverHTTP.java:97)
	at org.eclipse.jetty.client.transport.internal.HttpConnectionOverHTTP.onFillable(HttpConnectionOverHTTP.java:267)
	at org.eclipse.jetty.client.transport.internal.HttpConnectionOverHTTP$FillableCallback.succeeded(HttpConnectionOverHTTP.java:458)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
	at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:54)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:492)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.epcRunTask(AdaptiveExecutionStrategy.java:428)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:401)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:255)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.produce(AdaptiveExecutionStrategy.java:196)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:1009)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1239)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1194)
	at java.base/java.lang.Thread.run(Thread.java:840)```

See: https://jenkins.webtide.net/blue/organizations/jenkins/jetty.project/detail/PR-14437/7/tests