Program: 8119
Project: 8119
Buggy source:
@Test public void testQueryThroughGateway() throws Exception {
  FlowletExecutionContext ctx=new FlowletExecutionContext("String_Node_Str","String_Node_Str",false);
  ctx.setFlowIdentifier(new FlowIdentifier("String_Node_Str","String_Node_Str","String_Node_Str",-1,EntityType.QUERY));
  ctx.setConfiguration(configuration);
  ctx.setInstanceId(1);
  ctx.setOperationExecutor(new NoOperationExecutor());
  final QueryProviderProcessor queryProcessor=new QueryProviderProcessor(new HelloWorldQueryProvider(),ctx);
  new Thread(new Runnable(){
    @Override public void run(){
      try {
        queryProcessor.start();
      }
 catch (      Exception e) {
        e.printStackTrace();
      }
    }
  }
).start();
  while (!queryProcessor.isRunning()) {
    Thread.sleep(10);
  }
  String uriPrefix="String_Node_Str" + port + prefix+ path;
  HttpClient httpClient=new DefaultHttpClient();
  HttpGet get=new HttpGet(uriPrefix + "String_Node_Str");
  HttpResponse response=httpClient.execute(get);
  Assert.assertEquals(HttpStatus.SC_NOT_FOUND,response.getStatusLine().getStatusCode());
  httpClient=new DefaultHttpClient();
  get=new HttpGet(uriPrefix + "String_Node_Str");
  response=httpClient.execute(get);
  Assert.assertEquals(HttpStatus.SC_NOT_FOUND,response.getStatusLine().getStatusCode());
  httpClient=new DefaultHttpClient();
  get=new HttpGet(uriPrefix + "String_Node_Str");
  response=httpClient.execute(get);
  Assert.assertEquals(HttpStatus.SC_OK,response.getStatusLine().getStatusCode());
  String contentType=response.getEntity().getContentType().getValue();
  Assert.assertTrue(contentType.startsWith("String_Node_Str"));
  int pos=contentType.indexOf("String_Node_Str");
  String charset=pos > 0 ? contentType.substring(pos + 8) : "String_Node_Str";
  int length=(int)response.getEntity().getContentLength();
  InputStream content=response.getEntity().getContent();
  if (length > 0) {
    byte[] bytes=new byte[length];
    int bytesRead=content.read(bytes);
    Assert.assertEquals(-1,content.read(new byte[1]));
    Assert.assertEquals(length,bytesRead);
    Assert.assertEquals("String_Node_Str",new String(bytes,charset));
  }
  queryProcessor.stop();
}

Fixed version (ground truth):
@Test public void testQueryThroughGateway() throws Exception {
  FlowletExecutionContext ctx=new FlowletExecutionContext("String_Node_Str","String_Node_Str",false);
  FlowIdentifier identifier=new FlowIdentifier("String_Node_Str","String_Node_Str","String_Node_Str",-1);
  identifier.setType(EntityType.QUERY);
  ctx.setFlowIdentifier(identifier);
  ctx.setConfiguration(configuration);
  ctx.setInstanceId(1);
  ctx.setOperationExecutor(new NoOperationExecutor());
  final QueryProviderProcessor queryProcessor=new QueryProviderProcessor(new HelloWorldQueryProvider(),ctx);
  new Thread(new Runnable(){
    @Override public void run(){
      try {
        queryProcessor.start();
      }
 catch (      Exception e) {
        e.printStackTrace();
      }
    }
  }
).start();
  while (!queryProcessor.isRunning()) {
    Thread.sleep(10);
  }
  String uriPrefix="String_Node_Str" + port + prefix+ path;
  HttpClient httpClient=new DefaultHttpClient();
  HttpGet get=new HttpGet(uriPrefix + "String_Node_Str");
  HttpResponse response=httpClient.execute(get);
  Assert.assertEquals(HttpStatus.SC_NOT_FOUND,response.getStatusLine().getStatusCode());
  httpClient=new DefaultHttpClient();
  get=new HttpGet(uriPrefix + "String_Node_Str");
  response=httpClient.execute(get);
  Assert.assertEquals(HttpStatus.SC_NOT_FOUND,response.getStatusLine().getStatusCode());
  httpClient=new DefaultHttpClient();
  get=new HttpGet(uriPrefix + "String_Node_Str");
  response=httpClient.execute(get);
  Assert.assertEquals(HttpStatus.SC_OK,response.getStatusLine().getStatusCode());
  String contentType=response.getEntity().getContentType().getValue();
  Assert.assertTrue(contentType.startsWith("String_Node_Str"));
  int pos=contentType.indexOf("String_Node_Str");
  String charset=pos > 0 ? contentType.substring(pos + 8) : "String_Node_Str";
  int length=(int)response.getEntity().getContentLength();
  InputStream content=response.getEntity().getContent();
  if (length > 0) {
    byte[] bytes=new byte[length];
    int bytesRead=content.read(bytes);
    Assert.assertEquals(-1,content.read(new byte[1]));
    Assert.assertEquals(length,bytesRead);
    Assert.assertEquals("String_Node_Str",new String(bytes,charset));
  }
  queryProcessor.stop();
}