Program: 14515
Project: 14515
Buggy source:
@Override public void handleUpstream(ChannelHandlerContext ctx,ChannelEvent e) throws Exception {
  if (e instanceof MessageEvent && ((MessageEvent)e).getMessage() instanceof MappingHttpRequest) {
    MappingHttpRequest request=(MappingHttpRequest)((MessageEvent)e).getMessage();
    String newUri=null;
    String uri=request.getUri();
    InetSocketAddress remoteAddr=((InetSocketAddress)ctx.getChannel().getRemoteAddress());
    String remoteHost=remoteAddr.getAddress().getHostAddress();
    if (uri.startsWith("String_Node_Str"))     newUri=uri.replaceAll("String_Node_Str",remoteHost + "String_Node_Str");
 else     newUri=uri.replaceAll("String_Node_Str",remoteHost + "String_Node_Str");
    HttpResponse response=null;
    LOG.trace("String_Node_Str" + newUri);
    Object reply="String_Node_Str".getBytes();
    Exception replyEx=null;
    try {
      if (Bootstrap.isShuttingDown()) {
        reply="String_Node_Str".getBytes();
      }
 else       if (!Bootstrap.isFinished()) {
        reply="String_Node_Str".getBytes();
      }
 else {
        reply=ServiceContext.send("String_Node_Str",newUri);
      }
    }
 catch (    ServiceDispatchException e1) {
      LOG.debug(e1,e1);
      replyEx=e1;
    }
catch (    Exception e1) {
      LOG.debug(e1,e1);
      replyEx=e1;
    }
 finally {
      Contexts.clear(request.getCorrelationId());
    }
    Logs.extreme().debug("String_Node_Str" + reply + "String_Node_Str"+ replyEx);
    if (replyEx != null || reply == null || reply instanceof NullPayload) {
      response=new DefaultHttpResponse(request.getProtocolVersion(),HttpResponseStatus.NOT_FOUND);
      String errorMessage=String.format(ERROR_STRING,newUri.replaceAll(remoteHost + "String_Node_Str","String_Node_Str"),replyEx != null && Logs.isDebug() ? Exceptions.string(replyEx) : "String_Node_Str");
      if (Logs.isDebug()) {
        response.setHeader(HttpHeaders.Names.CONTENT_TYPE,"String_Node_Str");
        ChannelBuffer buffer=null;
        if (replyEx != null && !(replyEx instanceof NoSuchElementException)) {
          buffer=ChannelBuffers.wrappedBuffer(errorMessage.getBytes());
          response.setContent(buffer);
        }
 else {
          buffer=ChannelBuffers.wrappedBuffer(errorMessage.getBytes());
          response.setContent(buffer);
        }
        response.addHeader(HttpHeaders.Names.CONTENT_LENGTH,Integer.toString(buffer.readableBytes()));
      }
    }
 else {
      response=new DefaultHttpResponse(request.getProtocolVersion(),HttpResponseStatus.OK);
      response.setHeader(HttpHeaders.Names.CONTENT_TYPE,"String_Node_Str");
      ChannelBuffer buffer=ChannelBuffers.wrappedBuffer((byte[])reply);
      response.setContent(buffer);
      response.addHeader(HttpHeaders.Names.CONTENT_LENGTH,Integer.toString(buffer.readableBytes()));
    }
    ctx.getChannel().write(response).addListener(ChannelFutureListener.CLOSE);
  }
 else {
    ctx.sendUpstream(e);
  }
}

Fixed version (ground truth):
@Override public void handleUpstream(ChannelHandlerContext ctx,ChannelEvent e) throws Exception {
  if (e instanceof MessageEvent && ((MessageEvent)e).getMessage() instanceof MappingHttpRequest) {
    MappingHttpRequest request=(MappingHttpRequest)((MessageEvent)e).getMessage();
    String newUri=null;
    String uri=request.getUri();
    InetSocketAddress remoteAddr=((InetSocketAddress)ctx.getChannel().getRemoteAddress());
    String remoteHost=remoteAddr.getAddress().getHostAddress();
    if (uri.startsWith("String_Node_Str"))     newUri=uri.replaceAll("String_Node_Str",remoteHost + "String_Node_Str");
 else     newUri=uri.replaceAll("String_Node_Str",remoteHost + "String_Node_Str");
    HttpResponse response=null;
    LOG.trace("String_Node_Str" + newUri);
    Object reply="String_Node_Str".getBytes();
    Exception replyEx=null;
    try {
      if (Bootstrap.isShuttingDown()) {
        reply="String_Node_Str".getBytes();
      }
 else       if (!Bootstrap.isFinished()) {
        reply="String_Node_Str".getBytes();
      }
 else {
        reply=ServiceContext.send("String_Node_Str",newUri);
      }
    }
 catch (    ServiceDispatchException e1) {
      Logs.extreme().debug(e1,e1);
      replyEx=e1;
    }
catch (    Exception e1) {
      Logs.extreme().debug(e1,e1);
      replyEx=e1;
    }
 finally {
      Contexts.clear(request.getCorrelationId());
    }
    Logs.extreme().debug("String_Node_Str" + reply + "String_Node_Str"+ replyEx);
    if (replyEx != null || reply == null || reply instanceof NullPayload) {
      response=new DefaultHttpResponse(request.getProtocolVersion(),HttpResponseStatus.NOT_FOUND);
      String errorMessage=String.format(ERROR_STRING,newUri.replaceAll(remoteHost + "String_Node_Str","String_Node_Str"),replyEx != null && Logs.isDebug() ? Exceptions.string(replyEx) : "String_Node_Str");
      response.setHeader(HttpHeaders.Names.CONTENT_TYPE,"String_Node_Str");
      ChannelBuffer buffer=null;
      if (replyEx != null && !(replyEx instanceof NoSuchElementException)) {
        buffer=ChannelBuffers.wrappedBuffer(errorMessage.getBytes());
        response.setContent(buffer);
      }
 else {
        buffer=ChannelBuffers.wrappedBuffer(errorMessage.getBytes());
        response.setContent(buffer);
      }
      response.addHeader(HttpHeaders.Names.CONTENT_LENGTH,Integer.toString(buffer.readableBytes()));
    }
 else {
      response=new DefaultHttpResponse(request.getProtocolVersion(),HttpResponseStatus.OK);
      response.setHeader(HttpHeaders.Names.CONTENT_TYPE,"String_Node_Str");
      ChannelBuffer buffer=ChannelBuffers.wrappedBuffer((byte[])reply);
      response.setContent(buffer);
      response.addHeader(HttpHeaders.Names.CONTENT_LENGTH,Integer.toString(buffer.readableBytes()));
    }
    ctx.getChannel().write(response).addListener(ChannelFutureListener.CLOSE);
  }
 else {
    ctx.sendUpstream(e);
  }
}