Program: 90914
Project: 90914
Buggy source:
/** 
 * @param host The name of the host to connect to.
 * @param portNum The port to connect to on the target host.
 * @param protocol The Protocol to use.
 * @param delay The interval in which failed writes should be retried.
 * @param name The name of the Appender.
 * @param immediateFlush "true" if data should be flushed on each write.
 * @param suppress "true" if exceptions should be hidden from the application, "false" otherwise.The default is "true".
 * @param layout The layout to use (defaults to SerlializedLayout).
 * @param filter The Filter or null.
 * @return A SocketAppender.
 */
@PluginFactory public static SocketAppender createAppender(@PluginAttr("String_Node_Str") String host,@PluginAttr("String_Node_Str") String portNum,@PluginAttr("String_Node_Str") String protocol,@PluginAttr("String_Node_Str") String delay,@PluginAttr("String_Node_Str") String name,@PluginAttr("String_Node_Str") String immediateFlush,@PluginAttr("String_Node_Str") String suppress,@PluginElement("String_Node_Str") Layout layout,@PluginElement("String_Node_Str") Filter filter){
  boolean isFlush=immediateFlush == null ? true : Boolean.valueOf(immediateFlush);
  ;
  boolean handleExceptions=suppress == null ? true : Boolean.valueOf(suppress);
  int reconnectDelay=delay == null ? 0 : Integer.parseInt(delay);
  int port=portNum == null ? 0 : Integer.parseInt(portNum);
  if (layout == null) {
    layout=SerializedLayout.createLayout();
  }
  if (name == null) {
    LOGGER.error("String_Node_Str");
    return null;
  }
  AbstractSocketManager manager=createSocketManager(protocol,host,port,reconnectDelay);
  if (manager == null) {
    return null;
  }
  return new SocketAppender(name,layout,filter,manager,handleExceptions,isFlush);
}

Fixed version (ground truth):
/** 
 * @param host The name of the host to connect to.
 * @param portNum The port to connect to on the target host.
 * @param protocol The Protocol to use.
 * @param delay The interval in which failed writes should be retried.
 * @param name The name of the Appender.
 * @param immediateFlush "true" if data should be flushed on each write.
 * @param suppress "true" if exceptions should be hidden from the application, "false" otherwise.The default is "true".
 * @param layout The layout to use (defaults to SerlializedLayout).
 * @param filter The Filter or null.
 * @return A SocketAppender.
 */
@PluginFactory public static SocketAppender createAppender(@PluginAttr("String_Node_Str") String host,@PluginAttr("String_Node_Str") String portNum,@PluginAttr("String_Node_Str") String protocol,@PluginAttr("String_Node_Str") String delay,@PluginAttr("String_Node_Str") String name,@PluginAttr("String_Node_Str") String immediateFlush,@PluginAttr("String_Node_Str") String suppress,@PluginElement("String_Node_Str") Layout layout,@PluginElement("String_Node_Str") Filter filter){
  boolean isFlush=immediateFlush == null ? true : Boolean.valueOf(immediateFlush);
  boolean handleExceptions=suppress == null ? true : Boolean.valueOf(suppress);
  int reconnectDelay=delay == null ? 0 : Integer.parseInt(delay);
  int port=portNum == null ? 0 : Integer.parseInt(portNum);
  if (layout == null) {
    layout=SerializedLayout.createLayout();
  }
  if (name == null) {
    LOGGER.error("String_Node_Str");
    return null;
  }
  AbstractSocketManager manager=createSocketManager(protocol,host,port,reconnectDelay);
  if (manager == null) {
    return null;
  }
  return new SocketAppender(name,layout,filter,manager,handleExceptions,isFlush);
}