ADDITIONAL SYSTEM INFORMATION :
Microsoft Windows [Version 10.0.19044.2006]

openjdk version "19.0.1" 2022-10-18
OpenJDK Runtime Environment (build 19.0.1+10-21)
OpenJDK 64-Bit Server VM (build 19.0.1+10-21, mixed mode, sharing)

A DESCRIPTION OF THE PROBLEM :
See https://youtrack.jetbrains.com/issue/IDEA-305072 for a related discussion.

The attached testcase runs fine without a debugger, but if you run it in debug mode the JVM will get progressively slower until ~2 hours later the JVM will hang indefinitely.

Sometimes the hang is so bad that jstack and jmap will refuse to connect (they are probably unable to spawn a new thread).

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Start a debugging session of the attached testcase: 
2. About 2 hours - 2:30 hours later, output will cease and the JVM will hang indefinitely.
3. If you run the same testcase without a debugging session, it will not hang.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
There are about 500 live threads running at a time and no threads or memory seem to be leaking (as far as VisualVM seems to show), so I am not expecting a hang or a crash.
ACTUAL -
JVM hangs. Often when this happens, jstack (and related tools) cannot attach to probe the state of the JVM.

---------- BEGIN SOURCE ----------
pom.xml:
----------------------------
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>org.example</groupId>
	<artifactId>ThreadsHang</artifactId>
	<version>1.0-SNAPSHOT</version>

	<properties>
		<maven.compiler.release>19</maven.compiler.release>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<dependency>
			<groupId>com.google.guava</groupId>
			<artifactId>guava</artifactId>
			<version>31.1-jre</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>2.0.3</version>
		</dependency>
		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-classic</artifactId>
			<version>1.4.4</version>
			<exclusions>
				<exclusion>
					<groupId>javax.activation</groupId>
					<artifactId>activation</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.mail</groupId>
					<artifactId>javax.mail</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.10.1</version>
				<configuration>
					<showWarnings>true</showWarnings>
					<showDeprecation>true</showDeprecation>
					<compilerArgs>
						<arg>-Xlint:all,-preview,-try</arg>
						<arg>-Xdiags:verbose</arg>
						<arg>-Werror</arg>
						<arg>--enable-preview</arg>
					</compilerArgs>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

PlatformThreadsTestcase:
---------------------------------------
import com.google.common.util.concurrent.ThreadFactoryBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.LongAdder;

public class PlatformThreadsTestcase
{
	private final ThreadFactory blockingTasksThreadFactory = new ThreadFactoryBuilder().
		setNameFormat("BlockingTask-%d").
		build();
	private final ExecutorService blockingTasksExecutor = Executors.newThreadPerTaskExecutor(
		blockingTasksThreadFactory);
	private final Logger log = LoggerFactory.getLogger(PlatformThreadsTestcase.class);

	public static void main(String[] args) throws InterruptedException
	{
		PlatformThreadsTestcase testcase = new PlatformThreadsTestcase();
		testcase.run();
	}

	public void run() throws InterruptedException
	{
		Semaphore semaphore = new Semaphore(500);
		LongAdder adder = new LongAdder();
		while (true)
		{
			semaphore.acquire();
			blockingTasksExecutor.submit(() ->
			{
				adder.increment();
				long sum = adder.sum();
				if ((sum % 1000) == 0)
					log.info("Progress: {}", sum);
				try
				{
					Thread.sleep(50);
				}
				catch (InterruptedException e)
				{
					throw new RuntimeException(e);
				}
				finally
				{
					semaphore.release();
				}
			});
		}
	}
}
---------- END SOURCE ----------

FREQUENCY : always