Program: 24501
Project: 24501
Buggy source:
public void processRequest(HttpExchange httpExchange,HashMap<String,String> paramMap){
  String jobId=paramMap.get(ServerUtils.JOB_ID_KEY);
  String superstepId=paramMap.get(ServerUtils.SUPERSTEP_ID_KEY);
  Debug.println("String_Node_Str",paramMap.toString());
  try {
    if (jobId == null || superstepId == null) {
      throw new IllegalArgumentException("String_Node_Str");
    }
    Long superstepNo=Long.parseLong(paramMap.get(ServerUtils.SUPERSTEP_ID_KEY));
    if (superstepNo < -1) {
      this.statusCode=HttpURLConnection.HTTP_BAD_REQUEST;
      this.response=String.format("String_Node_Str",ServerUtils.SUPERSTEP_ID_KEY);
      return;
    }
    ArrayList<String> vertexIds=null;
    String rawVertexIds=paramMap.get(ServerUtils.VERTEX_ID_KEY);
    if (rawVertexIds == null) {
      vertexIds=ServerUtils.getVerticesDebugged(jobId,superstepNo);
    }
 else {
      vertexIds=new ArrayList(Arrays.asList(rawVertexIds.split("String_Node_Str")));
    }
    if (this.responseMimeType == javax.ws.rs.core.MediaType.APPLICATION_OCTET_STREAM) {
      if (vertexIds.size() > 1) {
        this.statusCode=HttpURLConnection.HTTP_BAD_REQUEST;
        this.response="String_Node_Str";
        return;
      }
      this.statusCode=HttpURLConnection.HTTP_OK;
      this.responseBytes=ServerUtils.readTrace(jobId,superstepNo,vertexIds.get(0).trim());
      return;
    }
    JSONObject scenarioObj=new JSONObject();
    for (    String vertexId : vertexIds) {
      GiraphScenarioWrapper giraphScenarioWrapper;
      giraphScenarioWrapper=ServerUtils.readScenarioFromTrace(jobId,superstepNo,vertexId.trim());
      scenarioObj.put(vertexId,ServerUtils.scenarioToJSON(giraphScenarioWrapper));
    }
    this.statusCode=HttpURLConnection.HTTP_OK;
    this.response=scenarioObj.toString();
  }
 catch (  IllegalArgumentException e) {
    this.statusCode=HttpURLConnection.HTTP_BAD_REQUEST;
    this.response=String.format("String_Node_Str",ServerUtils.JOB_ID_KEY,ServerUtils.SUPERSTEP_ID_KEY);
  }
catch (  ClassNotFoundException e) {
    this.statusCode=HttpURLConnection.HTTP_INTERNAL_ERROR;
    this.response="String_Node_Str";
  }
catch (  IOException e) {
    this.statusCode=HttpURLConnection.HTTP_BAD_REQUEST;
    this.response="String_Node_Str";
  }
catch (  JSONException e) {
    this.statusCode=HttpURLConnection.HTTP_INTERNAL_ERROR;
    this.response="String_Node_Str";
  }
}

Fixed version (ground truth):
public void processRequest(HttpExchange httpExchange,HashMap<String,String> paramMap){
  String jobId=paramMap.get(ServerUtils.JOB_ID_KEY);
  String superstepId=paramMap.get(ServerUtils.SUPERSTEP_ID_KEY);
  Debug.println("String_Node_Str",paramMap.toString());
  try {
    if (jobId == null || superstepId == null) {
      throw new IllegalArgumentException("String_Node_Str");
    }
    Long superstepNo=Long.parseLong(paramMap.get(ServerUtils.SUPERSTEP_ID_KEY));
    if (superstepNo < -1) {
      this.statusCode=HttpURLConnection.HTTP_BAD_REQUEST;
      this.response=String.format("String_Node_Str",ServerUtils.SUPERSTEP_ID_KEY);
      return;
    }
    ArrayList<String> vertexIds=null;
    String rawVertexIds=paramMap.get(ServerUtils.VERTEX_ID_KEY);
    if (rawVertexIds == null) {
      vertexIds=ServerUtils.getVerticesDebugged(jobId,superstepNo);
    }
 else {
      vertexIds=new ArrayList(Arrays.asList(rawVertexIds.split("String_Node_Str")));
    }
    if (paramMap.get("String_Node_Str") != null) {
      if (vertexIds.size() > 1) {
        this.statusCode=HttpURLConnection.HTTP_BAD_REQUEST;
        this.response="String_Node_Str";
        return;
      }
      String vertexId=vertexIds.get(0).trim();
      this.responseContentType=MediaType.APPLICATION_OCTET_STREAM;
      this.statusCode=HttpURLConnection.HTTP_OK;
      this.responseBytes=ServerUtils.readTrace(jobId,superstepNo,vertexId);
      String fileName=String.format("String_Node_Str",jobId,ServerUtils.getTraceFileName(superstepNo,vertexId));
      this.setResponseHeader("String_Node_Str","String_Node_Str" + fileName);
      return;
    }
    JSONObject scenarioObj=new JSONObject();
    for (    String vertexId : vertexIds) {
      GiraphScenarioWrapper giraphScenarioWrapper;
      giraphScenarioWrapper=ServerUtils.readScenarioFromTrace(jobId,superstepNo,vertexId.trim());
      scenarioObj.put(vertexId,ServerUtils.scenarioToJSON(giraphScenarioWrapper));
    }
    this.statusCode=HttpURLConnection.HTTP_OK;
    this.response=scenarioObj.toString();
  }
 catch (  IllegalArgumentException e) {
    this.statusCode=HttpURLConnection.HTTP_BAD_REQUEST;
    this.response=String.format("String_Node_Str",ServerUtils.JOB_ID_KEY,ServerUtils.SUPERSTEP_ID_KEY);
  }
catch (  ClassNotFoundException e) {
    this.statusCode=HttpURLConnection.HTTP_INTERNAL_ERROR;
    this.response="String_Node_Str";
  }
catch (  IOException e) {
    this.statusCode=HttpURLConnection.HTTP_BAD_REQUEST;
    this.response="String_Node_Str";
  }
catch (  JSONException e) {
    this.statusCode=HttpURLConnection.HTTP_INTERNAL_ERROR;
    this.response="String_Node_Str";
  }
}