ADDITIONAL SYSTEM INFORMATION :
Windows 10, JDK 13

A DESCRIPTION OF THE PROBLEM :
When starting processes using java.lang.ProcessBuilder / java.lang.Process, the Windows handle count increases continuously. This leads to the system becoming unresponsive after reaching several hundred thousand handles.

Java 8 and Java 9 are not affected, the regression seems to occur since Java 10.

REGRESSION : Last worked in version 8u241

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the test program below. Observe the handle count in den Windows Task Manager by enabling the handle column in the details tab.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Windows handle count stays stable.
ACTUAL -
Windows handle count increases continuously.

---------- BEGIN SOURCE ----------
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class HandleLeak {

	public static void main(String[] args) {
		while( true ) {
			try {
				Process testProcess = new ProcessBuilder("cmd", "/c", "dir").start();
				Thread outputConsumer  = new Thread(() -> consumeStream( testProcess.getInputStream() ) );
				outputConsumer.setDaemon( true );
				outputConsumer.start();
				Thread errorConsumer  = new Thread(() -> consumeStream( testProcess.getErrorStream() ) );
				errorConsumer.setDaemon( true );
				errorConsumer.start();

				testProcess.waitFor();
				System.gc();
			} catch (IOException | InterruptedException e) {
				e.printStackTrace();
			}
		}
	}

	private static void consumeStream( InputStream inputStream ) {
		BufferedReader reader = null;
		try {
			reader = new BufferedReader(new InputStreamReader(inputStream));
			while( reader.readLine() != null ) {
				;
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if( reader != null ) {
				try {
					reader.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
}
---------- END SOURCE ----------

FREQUENCY : always