Name: rlT66838			Date: 07/30/97

Software: Solaris 2.5.1
Hardware: Ultra Sparc 1

The following source core makes the Java VM grow in
size indefinitely indicating a memory leak in the VM
or the Solaris motif libraries.

Here's the java source code:

import java.awt.*;

public class MemoryLeak7
{
	public static void main( String args[] )
	{
		for( ;; )
		{
			for( int i = 0; i < 16; i++ )
			{
				Frame frame = new Frame();
				frame.setSize( 300, 300 );
				frame.setTitle( "Leaky Frame" );
				frame.setVisible( true );
				frame.setVisible( false );
				frame.dispose();
				frame = null;
			}
			System.gc();
			System.runFinalization();

			try
			{
				System.out.println( "---------- Sleeping ----------" );
				Thread.currentThread().sleep( 5000 );
				System.out.println( "------ Finished Sleeping ------" );
			}
			catch( Exception e )
			{
				System.err.println( "Thread interrupted" );
			}
		}	// end: infinite for loop
	}	// end: main
}
company - Sterling Diagnostic Imaging, Inc. , email - ###@###.###
======================================================================


###################### so#3383176 - Thu14May98-15:45 BELLEY ###############3
# java -fullversion
java full version "Solaris_JDK_1.1.5_02"

Bug number 4068618 still occurs on a cleanly installed 128MB Ultra 5
running 2.5.1.  Per the install instructions, I installed patches 103566-25
and 103640-17.

I was monitoring memory usage by simply doing   ls -la /proc/xxx on the pid
of the job.  Left running, this program will CRASH the machine (first, it
reports a SYSSEGV error, and the machine is left in a state that requires a
reboot to clear).

The source code I was using is as follows: (slightly modified from the
reported bug:)

import java.awt.*;
import java.util.*;


public class MemoryLeak7
{
  public static void main( String args[] )
    {
      Frame frame;
      Runtime rt = Runtime.getRuntime();
      for( ;; )
	{
	  for( int i = 0; i < 16; i++ )
	    {
	      frame = new Frame();
	      frame.setSize( 300, 300 );
	      frame.setTitle( "Leaky Frame" );
	      frame.setVisible( true );
	      frame.setVisible( false );
	      frame.dispose();
       	     
	    }
	  rt.gc();
	  System.gc();
	  System.runFinalization();
	  rt.gc();
	  try
	    {
	      System.out.println( "---------- Sleeping ----------" );
	      Thread.currentThread().sleep( 1000 );
	      System.out.println( "------ Finished Sleeping ------" );
	      System.out.println("Total Memory: "+rt.freeMemory());
	    }
	  catch( Exception e )
	    {
	      System.err.println( "Thread interrupted" );
	    }
	} // end: infinite for loop
    } // end: main
}


For what it is worth, we tried this on a system running 2.6, and the same
problem occurs.
######################