Name: rm29839 Date: 11/03/97


hello,

It happens when using ObjectOutputStream for
writing many objects. It seems that object aren't
garbage collected after being saved. Closing
the stream is a solution but...

Thanks,
Claude.

The behavior is the same on Solaris

>>> here is an example :

class TestSave extends Thread{


  public static void main (String[] args){
TestSave ts = new TestSave();
ts.run();
}
 

      try{
         ObjectOutputStream os= new ObjectOutputStream(new FileOutputStream(new File("try")));
         
         for (int t=0;t<5000;t++)
            {
               System.out.println( t );
               MyBigObject mbo=new MyBigObject();
               os.writeObject(mbo);
               os.flush();
            }
         os.close();
      }
      catch (Exception e){
         System.out.println("exception : " + e + " : " + e .getMessage());
      }
      
   }
   
}


class MyBigObject implements Serializable {

   byte[] b = null;

   MySubBigObject msbo= null;

   public MyBigObject()
   {
      b=new byte[2000];
      msbo=new MySubBigObject();
   }
   
}

class MySubBigObject implements Serializable {

   byte[] b = null;

   public MySubBigObject()
   {
      b=new byte[2000];
   }
   
}


>>>> and a trace

...
...
3190
3191
3192
3193
3194
3195
3196
3197
3198
java.lang.OutOfMemoryError:
at java.io.ObjectOutputStream.assignWireOffset(ObjectOutputStream.java:786)
at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:670)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:225)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:325)
at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:707)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:225)
at transdoc.TestSave.run(essai.java:32)
(Review ID: 18618)
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