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  1. JDK
  2. JDK-8017146

Memory Leak while drawing an AttributedString

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    • Subcomponent:
      2d
    • OS:
      windows_7

      Description

      FULL PRODUCT VERSION :
      java version " 1.7.0_21 "
      Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
      Java HotSpot(TM) Client VM (build 23.21-b01, mixed mode, sharing)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 6.1.7601]

      A DESCRIPTION OF THE PROBLEM :
      Memory cumulates in process explorer, while the heap stays constant. This results in a " java.lang.OutOfMemoryError: unable to create new native thread " .

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Use the code provided to test the memory leak. If you comment the lines 9-10 out and uncomment line 12 everything goes right.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      The memory should not leak.
      ACTUAL -
      It is leaking.

      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      java.lang.OutOfMemoryError: unable to create new native thread

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      final JFrame frm = new JFrame();
      frm.getContentPane().setLayout(new BorderLayout());
      frm.getContentPane().add(new JLabel() {
      @Override public void paint(Graphics g)
      {
      super.paint(g);
      Graphics2D gd = (Graphics2D) g;
      // Memory leaking:
      AttributedString as = new AttributedString( " this is a memory leak " , gd.getFont().getAttributes());
      gd.drawString(as.getIterator(), 100, 100);
      // No memory leak:
      // gd.drawString( " no memory leak here " , 100, 100);
      }
      }, BorderLayout.CENTER);
      frm.setSize(500,350);
      frm.setLocationRelativeTo(null);
      frm.setVisible(true);
      new Thread() {
      @Override public void run() {
      while(true)
      {
      try
      {
      frm.getContentPane().repaint();
      Thread.sleep(1);
      } catch (InterruptedException ex)
      {
      Logger.getLogger(SIMAVIS_S_Main.class.getName()).log(Level.SEVERE, null, ex);
      }
      }
      }
      }.start();
      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      Like described above, if you use gd.drawString( " mystring " , ...) instead of AttributedString as the first argument the memory wouldn't leak.

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              Assignee:
              prr Philip Race
              Reporter:
              webbuggrp Webbug Group
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                Dates

                Created:
                Updated:
                Resolved: