The following test failed in the JDK24 CI:

jdk/jshell/ToolReloadTest.java

Here's a snippet from the log file:

#section:testng
----------messages:(8/425)----------
command: testng ToolReloadTest
reason: User specified action: run testng ToolReloadTest
started: Mon Jul 15 14:41:59 UTC 2024
Mode: agentvm
Agent id: 8
Additional exports to unnamed modules from @modules: jdk.compiler/com.sun.tools.javac.api jdk.compiler/com.sun.tools.javac.main jdk.jdeps/com.sun.tools.javap jdk.jshell/jdk.internal.jshell.tool
finished: Mon Jul 15 14:42:12 UTC 2024
elapsed time (seconds): 12.994
----------configuration:(18/1623)*----------

<snip>

----------System.out:(101/6606)----------
config ReplToolTesting.setUp(): success
test ToolReloadTest.testEnvBadModule(): success
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadClasspath(): success
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadCrashRestore(): success
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadDrop(): success
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadExitRestore(): failure
java.lang.AssertionError: user error: /reload -restore.
 expected [] but found [Exception in thread "main" java.lang.OutOfMemoryError: unable to create native thread: possibly out of memory or process/resource limits reached
at java.base/java.lang.Thread.start0(Native Method)
at java.base/java.lang.Thread.start(Thread.java:1518)
at jdk.jshell/jdk.jshell.execution.Util.forwardExecutionControlAndIO(Util.java:145)
at jdk.jshell/jdk.jshell.execution.RemoteExecutionControl.main(RemoteExecutionControl.java:74)
]
at org.testng.Assert.fail(Assert.java:99)
at org.testng.Assert.failNotEquals(Assert.java:1037)
at org.testng.Assert.assertEqualsImpl(Assert.java:140)
at org.testng.Assert.assertEquals(Assert.java:122)
at org.testng.Assert.assertEquals(Assert.java:629)
at ReplToolTesting.assertOutput(ReplToolTesting.java:576)
at ReplToolTesting.assertCommand(ReplToolTesting.java:560)
at ReplToolTesting.assertCommand(ReplToolTesting.java:542)
at ReplToolTesting.assertCommand(ReplToolTesting.java:493)
at ToolReloadTest.lambda$testReloadExitRestore$78(ToolReloadTest.java:232)
at ReplToolTesting$PromptedCommandOutputStream.write(ReplToolTesting.java:876)
at java.base/java.io.PrintStream.implWrite(PrintStream.java:601)
at java.base/java.io.PrintStream.write(PrintStream.java:581)
at jdk.internal.le/jdk.internal.org.jline.terminal.impl.LineDisciplineTerminal.processOutputByte(LineDisciplineTerminal.java:306)
at jdk.internal.le/jdk.internal.org.jline.terminal.impl.LineDisciplineTerminal$FilteringOutputStream.write(LineDisciplineTerminal.java:356)
at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:291)
at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:386)
at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:391)
at java.base/sun.nio.cs.StreamEncoder.lockedFlush(StreamEncoder.java:208)
at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:195)
at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:264)
at java.base/java.io.PrintWriter.implFlush(PrintWriter.java:426)
at java.base/java.io.PrintWriter.flush(PrintWriter.java:418)
at jdk.internal.le/jdk.internal.org.jline.terminal.impl.AbstractTerminal.flush(AbstractTerminal.java:180)
at jdk.internal.le/jdk.internal.org.jline.utils.Display.update(Display.java:338)
at jdk.internal.le/jdk.internal.org.jline.reader.impl.LineReaderImpl.redisplay(LineReaderImpl.java:4010)
at jdk.internal.le/jdk.internal.org.jline.reader.impl.LineReaderImpl.redisplay(LineReaderImpl.java:3869)
at jdk.internal.le/jdk.internal.org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:679)
at jdk.internal.le/jdk.internal.org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:512)
at jdk.jshell/jdk.internal.jshell.tool.ConsoleIOContext.readLine(ConsoleIOContext.java:229)
at jdk.jshell/jdk.internal.jshell.tool.JShellTool.getInput(JShellTool.java:1299)
at jdk.jshell/jdk.internal.jshell.tool.JShellTool.run(JShellTool.java:1233)
at jdk.jshell/jdk.internal.jshell.tool.JShellTool.start(JShellTool.java:1018)
at jdk.jshell/jdk.internal.jshell.tool.JShellToolBuilder.run(JShellToolBuilder.java:259)
at ReplToolTesting.testRawRun(ReplToolTesting.java:330)
at ReplToolTesting.testRaw(ReplToolTesting.java:313)
at ReplToolTesting.test(ReplToolTesting.java:265)
at ReplToolTesting.test(ReplToolTesting.java:252)
at ReplToolTesting.test(ReplToolTesting.java:244)
at ToolReloadTest.testReloadExitRestore(ToolReloadTest.java:231)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:588)
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:1597)
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:102)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:588)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
at java.base/java.lang.Thread.run(Thread.java:1575)
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadIgnore(): success
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadQuiet(): success
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadRepeat(): success
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadResetRestore(): success
config ReplToolTesting.setUp(): success
test ToolReloadTest.testReloadSnippets(): success

===============================================
jdk/jshell/ToolReloadTest.java
Total tests run: 10, Passes: 9, Failures: 1, Skips: 0
===============================================

----------System.err:(10/539)----------
java.lang.Exception: failures: 1
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:104)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:588)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
at java.base/java.lang.Thread.run(Thread.java:1575)

JavaTest Message: Test threw exception: java.lang.Exception
JavaTest Message: shutting down test

result: Failed. Execution failed: `main' threw exception: java.lang.Exception: failures: 1

There are 10 sub-tests in this test. 4 sub-tests passed,
1 sub-test failed, and then 5 more sub-tests passed. This
is a bit odd for an "unable to create native thread" failure.

It doesn't appear to me that this failure has anything to do
with the test being executed. There might be some strange
and intermittent infrastructure failure or some underlying
runtime issue so I'm starting this bug off in hotspot/runtime
for initial triage.