[jira] Commented: (XERCESJ-1037) Critical Object streaming error with large documents

["Winfried Wasser (JIRA)" <xe...@xml.apache.org>]

     [ http://issues.apache.org/jira/browse/XERCESJ-1037?page=comments#action_59186 ]
     
Winfried Wasser commented on XERCESJ-1037:
------------------------------------------

Simple testcase for you (and it's not a memory problem).

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import junit.framework.TestCase;

import org.apache.xerces.dom.DocumentImpl;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class TestSerialisation extends TestCase {

  public TestSerialisation() {
    super();
  }

  public static void main(String[] args) {
    junit.textui.TestRunner.run(TestSerialisation.class);
  }

  public void test_001() {
    Document document = new DocumentImpl();
    document.appendChild(document.createElement("childs"));
    File outputFile = new File("test.bin");
    try {
      for (int i = 0; i < 100; i++) {
        Element rootElement = document.getDocumentElement();
        for (int loop = 0; loop < 50; loop++) {
          Element child = (Element) rootElement.appendChild(document.createElement("test"));
          child.appendChild(document.createTextNode("NR_" + ((i * 10) + loop + 1)));
        }
        try {
          ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(outputFile, false));
          out.writeObject(document);
          out.flush();
          out.close();
        } catch (Throwable e) {
          e.printStackTrace();
          fail("Serialisation failed : " + e.getMessage());
        }
        System.out.println("Elements: " + rootElement.getChildNodes().getLength() + " Filesize: "
            + outputFile.length());
        document = null;
        try {
          ObjectInputStream in = new ObjectInputStream(new FileInputStream(outputFile));
          document = (Document) in.readObject();
          in.close();
        } catch (Throwable e) {
          e.printStackTrace();
          fail("Deserialisation failed : " + e.getMessage());
        }
      }
    } finally {
      try {
        outputFile.delete();
      } catch (Exception e) {
      }
    }
  }

}

> Critical Object streaming error with large documents
> ----------------------------------------------------
>
>          Key: XERCESJ-1037
>          URL: http://issues.apache.org/jira/browse/XERCESJ-1037
>      Project: Xerces2-J
>         Type: Bug
>   Components: DOM
>     Versions: 2.6.2
>  Environment: Windows XP, Sun, Linux, HP
>     Reporter: Winfried Wasser

>
> When I try to stream an DOM Node (Document) with the standard Java Streaming API (by ObjectOutputStream) I get an StackOverflowError at Documents above a size of 600-800 (I can't determine this exactly) Elements. Sometimes I get this error at writing the Stream otherwise I get it at reading the Document from Stream.
> Its simple testable with an large Document parsed and Serialized by an ObjectOutputStream to an File - afterwards reading it back from this File --> and error is there.

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