src/main/java/org/apache/log4j/receivers/xml/UtilLoggingXMLDecoder.java [108:147]:
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    } catch (ParserConfigurationException pce) {
      System.err.println("Unable to get document builder");
    }
  }

  /**
   * Sets an additionalProperty map, where each Key/Value pair is
   * automatically added to each LoggingEvent as it is decoded.
   *
   * This is useful, say, to include the source file name of the Logging events
   * @param properties additional properties
   */
  public void setAdditionalProperties(final Map properties) {
    this.additionalProperties = properties;
  }

  /**
   * Converts the LoggingEvent data in XML string format into an actual
   * XML Document class instance.
   * @param data XML fragment
   * @return  dom document
   */
  private Document parse(final String data) {
    if (docBuilder == null || data == null) {
      return null;
    }

    Document document = null;

    try {
      // we change the system ID to a valid URI so that Crimson won't
      // complain. Indeed, "log4j.dtd" alone is not a valid URI which
      // causes Crimson to barf. The Log4jEntityResolver only cares
      // about the "log4j.dtd" ending.

      /**
       * resetting the length of the StringBuffer is dangerous, particularly
       * on some JDK 1.4 impls, there's a known Bug that causes a memory leak
       */
      StringBuffer buf = new StringBuffer(1024);
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src/main/java/org/apache/log4j/receivers/xml/XMLDecoder.java [120:158]:
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    } catch (ParserConfigurationException pce) {
      System.err.println("Unable to get document builder");
    }
  }

  /**
   * Sets an additionalProperty map, where each Key/Value pair is
   * automatically added to each LoggingEvent as it is decoded.
   *
   * This is useful, say, to include the source file name of the Logging events
   * @param properties additional properties
   */
  public void setAdditionalProperties(final Map properties) {
    this.additionalProperties = properties;
  }

  /**
   * Converts the LoggingEvent data in XML string format into an actual
   * XML Document class instance.
   * @param data XML fragment
   * @return dom document
   */
  private Document parse(final String data) {
    if (docBuilder == null || data == null) {
      return null;
    }
    Document document = null;

    try {
      // we change the system ID to a valid URI so that Crimson won't
      // complain. Indeed, "log4j.dtd" alone is not a valid URI which
      // causes Crimson to barf. The Log4jEntityResolver only cares
      // about the "log4j.dtd" ending.

      /**
       * resetting the length of the StringBuffer is dangerous, particularly
       * on some JDK 1.4 impls, there's a known Bug that causes a memory leak
       */
      StringBuffer buf = new StringBuffer(1024);
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