The following test failed in the JDK20 CI:

java/net/httpclient/CancelStreamedBodyTest.java

Here's a snippet from the log file:

----------System.out:(273/17116)----------
Http1TestServer[localhost/127.0.0.1:41883]::addHandler CancelStreamedBodyTest$HTTPSlowHandler@358f2ca7, /http1/x/
Http1TestServer[localhost/127.0.0.1:38199]::addHandler CancelStreamedBodyTest$HTTPSlowHandler@358f2ca7, /https1/x/
Http2TestServerImpl[localhost/127.0.0.1:55169]::addHandler CancelStreamedBodyTest$HTTPSlowHandler@687e1a8a, /http2/x/
Http2TestServerImpl[localhost/127.0.0.1:43629]::addHandler CancelStreamedBodyTest$HTTPSlowHandler@687e1a8a, /https2/x/
Http1TestServer: start
Http1TestServer: start
Http2TestServerImpl: start
Http2TestServerImpl: start
config CancelStreamedBodyTest.setup(): success
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success

[0 s, 366 ms, 407427 ns] testAsLines(http://localhost:41883/http1/x/new/testAsLines, false)
HTTPSlowHandler received request to /http1/x/new/testAsLines
Server wrote 12 bytes
Waiting for HTTP operations to terminate...
PASSED: No subscribers for testAsLines(http://localhost:41883/http1/x/new/testAsLines)
step [0,0] found in HttpClientImpl(1)
HTTPSlowHandler: unexpected exception: java.io.IOException: Broken pipe
HTTPSlowHandler reply sent: /http1/x/new/testAsLines
WARNING: exception caught in HttpTestHandler::handle java.io.IOException: Broken pipe
java.io.IOException: Broken pipe
at java.base/sun.nio.ch.SocketDispatcher.write0(Native Method)
at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:62)
at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:136)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:101)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:57)
at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:542)
at jdk.httpserver/sun.net.httpserver.Request$WriteStream.write(Request.java:390)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.writeChunk(ChunkedOutputStream.java:125)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.flush(ChunkedOutputStream.java:159)
at jdk.httpserver/sun.net.httpserver.PlaceholderOutputStream.flush(ExchangeImpl.java:469)
at CancelStreamedBodyTest$HTTPSlowHandler.handle(CancelStreamedBodyTest.java:430)
at HttpServerAdapters$HttpTestHandler.doHandle(HttpServerAdapters.java:382)
at HttpServerAdapters$HttpTestHandler.lambda$toHttpHandler$0(HttpServerAdapters.java:375)
at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:98)
at jdk.httpserver/sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:82)
at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:101)
at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:868)
at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:98)
at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:835)
at jdk.httpserver/sun.net.httpserver.ServerImpl$DefaultExecutor.execute(ServerImpl.java:204)
at jdk.httpserver/sun.net.httpserver.ServerImpl$Dispatcher.handle(ServerImpl.java:567)
at jdk.httpserver/sun.net.httpserver.ServerImpl$Dispatcher.run(ServerImpl.java:533)
at java.base/java.lang.Thread.run(Thread.java:1591)
Suppressed: java.io.IOException: Broken pipe
at java.base/sun.nio.ch.SocketDispatcher.write0(Native Method)
at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:62)
at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:136)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:101)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:57)
at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:542)
at jdk.httpserver/sun.net.httpserver.Request$WriteStream.write(Request.java:390)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.writeChunk(ChunkedOutputStream.java:125)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.flush(ChunkedOutputStream.java:159)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.close(ChunkedOutputStream.java:134)
at jdk.httpserver/sun.net.httpserver.PlaceholderOutputStream.close(ExchangeImpl.java:474)
at CancelStreamedBodyTest$HTTPSlowHandler.handle(CancelStreamedBodyTest.java:421)
... 12 more
HTTPSlowHandler received request to /http1/x/new/testAsLines
Server wrote 12 bytes
Server wrote 14 bytes
Waiting for HTTP operations to terminate...
Server wrote 22 bytes
HTTPSlowHandler: unexpected exception: java.io.IOException: Broken pipe
HTTPSlowHandler reply sent: /http1/x/new/testAsLines
WARNING: exception caught in HttpTestHandler::handle java.io.IOException: Broken pipe
java.io.IOException: Broken pipe
at java.base/sun.nio.ch.SocketDispatcher.write0(Native Method)
at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:62)
at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:136)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:101)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:57)
at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:542)
at jdk.httpserver/sun.net.httpserver.Request$WriteStream.write(Request.java:390)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.writeChunk(ChunkedOutputStream.java:125)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.flush(ChunkedOutputStream.java:159)
at jdk.httpserver/sun.net.httpserver.PlaceholderOutputStream.flush(ExchangeImpl.java:469)
at CancelStreamedBodyTest$HTTPSlowHandler.handle(CancelStreamedBodyTest.java:430)
at HttpServerAdapters$HttpTestHandler.doHandle(HttpServerAdapters.java:382)
at HttpServerAdapters$HttpTestHandler.lambda$toHttpHandler$0(HttpServerAdapters.java:375)
at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:98)
at jdk.httpserver/sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:82)
at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:101)
at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:868)
at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:98)
at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:835)
at jdk.httpserver/sun.net.httpserver.ServerImpl$DefaultExecutor.execute(ServerImpl.java:204)
at jdk.httpserver/sun.net.httpserver.ServerImpl$Dispatcher.handle(ServerImpl.java:567)
at jdk.httpserver/sun.net.httpserver.ServerImpl$Dispatcher.run(ServerImpl.java:533)
at java.base/java.lang.Thread.run(Thread.java:1591)
Suppressed: java.io.IOException: Broken pipe
at java.base/sun.nio.ch.SocketDispatcher.write0(Native Method)
at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:62)
at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:136)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:101)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:57)
at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:542)
at jdk.httpserver/sun.net.httpserver.Request$WriteStream.write(Request.java:390)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.writeChunk(ChunkedOutputStream.java:125)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.flush(ChunkedOutputStream.java:159)
at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.close(ChunkedOutputStream.java:134)
at jdk.httpserver/sun.net.httpserver.PlaceholderOutputStream.close(ExchangeImpl.java:474)
at CancelStreamedBodyTest$HTTPSlowHandler.handle(CancelStreamedBodyTest.java:421)
... 12 more
WARNING: tracker for HttpClientImpl(1) has outstanding operations:
Pending HTTP Requests: 0
Pending HTTP/1.1 operations: 0
Pending HTTP/2 streams: 0
Pending WebSocket operations: 0
Pending TCP connections: 0
Pending Subscribers: 1
Total pending operations: 0
Facade referenced: true
Selector alive: true
test CancelStreamedBodyTest.testAsLines("http://localhost:41883/http1/x/new", false): failure
java.lang.AssertionError: WARNING: tracker for HttpClientImpl(1) has outstanding operations:
Pending HTTP Requests: 0
Pending HTTP/1.1 operations: 0
Pending HTTP/2 streams: 0
Pending WebSocket operations: 0
Pending TCP connections: 0
Pending Subscribers: 1
Total pending operations: 0
Facade referenced: true
Selector alive: true
at ReferenceTracker.check(ReferenceTracker.java:229)
at CancelStreamedBodyTest.testAsLines(CancelStreamedBodyTest.java:278)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:599)
at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)
at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822)
at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at org.testng.TestRunner.privateRun(TestRunner.java:764)
at org.testng.TestRunner.run(TestRunner.java:585)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)
at org.testng.SuiteRunner.run(SuiteRunner.java:286)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.runSuites(TestNG.java:1069)
at org.testng.TestNG.run(TestNG.java:1037)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:93)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:53)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1591)
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testAsLines("https://localhost:38199/https1/x/new", false): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testAsLines("http://localhost:55169/http2/x/new", false): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testAsLines("https://localhost:43629/https2/x/new", false): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testAsLines("http://localhost:41883/http1/x/same", true): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testAsLines("https://localhost:38199/https1/x/same", true): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testAsLines("http://localhost:55169/http2/x/same", true): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testAsLines("https://localhost:43629/https2/x/same", true): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testInputStream("http://localhost:41883/http1/x/new", false): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testInputStream("https://localhost:38199/https1/x/new", false): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testInputStream("http://localhost:55169/http2/x/new", false): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testInputStream("https://localhost:43629/https2/x/new", false): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testInputStream("http://localhost:41883/http1/x/same", true): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testInputStream("https://localhost:38199/https1/x/same", true): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testInputStream("http://localhost:55169/http2/x/same", true): skip
org.testng.SkipException: some tests failed
config CancelStreamedBodyTest.beforeMethod(org.testng.TestRunner@1d9fea44): success
test CancelStreamedBodyTest.testInputStream("https://localhost:43629/https2/x/same", true): skip
org.testng.SkipException: some tests failed

=========================

[1 s, 799 ms, 470812 ns] Created 4 servers and 1 clients
Failed tests:
testAsLines[http://localhost:41883/http1/x/new, false]: java.lang.AssertionError: WARNING: tracker for HttpClientImpl(1) has outstanding operations:
Pending HTTP Requests: 0
Pending HTTP/1.1 operations: 0
Pending HTTP/2 streams: 0
Pending WebSocket operations: 0
Pending TCP connections: 0
Pending Subscribers: 1
Total pending operations: 0
Facade referenced: true
Selector alive: true
java.lang.AssertionError: WARNING: tracker for HttpClientImpl(1) has outstanding operations:
Pending HTTP Requests: 0
Pending HTTP/1.1 operations: 0
Pending HTTP/2 streams: 0
Pending WebSocket operations: 0
Pending TCP connections: 0
Pending Subscribers: 1
Total pending operations: 0
Facade referenced: true
Selector alive: true
at ReferenceTracker.check(ReferenceTracker.java:229)
at CancelStreamedBodyTest.testAsLines(CancelStreamedBodyTest.java:278)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:599)
at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)
at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822)
at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at org.testng.TestRunner.privateRun(TestRunner.java:764)
at org.testng.TestRunner.run(TestRunner.java:585)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)
at org.testng.SuiteRunner.run(SuiteRunner.java:286)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.runSuites(TestNG.java:1069)
at org.testng.TestNG.run(TestNG.java:1037)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:93)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:53)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1591)

=========================

config CancelStreamedBodyTest.printFailedTests(org.testng.TestRunner@1d9fea44): success
PASSED: No outstanding operations or unreleased resources found in 1 clients
Http1TestServer: stop
Http1TestServer: stop
Http2TestServerImpl: stop
Http2TestServerImpl: stop
config CancelStreamedBodyTest.teardown(): success

===============================================
java/net/httpclient/CancelStreamedBodyTest.java
Total tests run: 16, Passes: 0, Failures: 1, Skips: 15
===============================================

----------System.err:(590/58174)----------