Program: 4857
Project: 4857
Buggy source:
@Override public CloseableIterator<RawMessage> fetch() throws IOException, TopicNotFoundException {
  GenericRecord record=new GenericData.Record(Schemas.V1.ConsumeRequest.SCHEMA);
  if (getStartOffset() != null) {
    record.put("String_Node_Str",ByteBuffer.wrap(getStartOffset()));
  }
  if (getStartTime() != null) {
    record.put("String_Node_Str",getStartTime());
  }
  record.put("String_Node_Str",isIncludeStart());
  record.put("String_Node_Str",getLimit());
  if (getTransaction() != null) {
    record.put("String_Node_Str",ByteBuffer.wrap(TRANSACTION_CODEC.encode(getTransaction())));
  }
  URL url=remoteClient.resolve(createTopicPath(topicId) + "String_Node_Str");
  final HttpURLConnection urlConn=(HttpURLConnection)url.openConnection();
  urlConn.setConnectTimeout(HTTP_REQUEST_CONFIG.getConnectTimeout());
  urlConn.setReadTimeout(HTTP_REQUEST_CONFIG.getReadTimeout());
  urlConn.setRequestMethod("String_Node_Str");
  urlConn.setRequestProperty(HttpHeaders.CONTENT_TYPE,"String_Node_Str");
  urlConn.setDoInput(true);
  urlConn.setDoOutput(true);
  Encoder encoder=EncoderFactory.get().directBinaryEncoder(urlConn.getOutputStream(),null);
  DatumWriter<GenericRecord> datumWriter=new GenericDatumWriter<>(Schemas.V1.ConsumeRequest.SCHEMA);
  datumWriter.write(record,encoder);
  int responseCode=urlConn.getResponseCode();
  if (responseCode == HttpURLConnection.HTTP_NOT_FOUND) {
    throw new TopicNotFoundException(topicId.getNamespace(),topicId.getTopic());
  }
  handleError(responseCode,new Supplier<String>(){
    @Override public String get(){
      InputStream errorStream=urlConn.getErrorStream();
      try {
        return errorStream == null ? "String_Node_Str" : new String(ByteStreams.toByteArray(errorStream),StandardCharsets.UTF_8);
      }
 catch (      IOException e) {
        return "String_Node_Str";
      }
    }
  }
,"String_Node_Str" + topicId);
  verifyContentType(urlConn.getHeaderFields(),"String_Node_Str");
  final Decoder decoder=DecoderFactory.get().binaryDecoder(urlConn.getInputStream(),null);
  final long initialItemCount=decoder.readArrayStart();
  return new AbstractCloseableIterator<RawMessage>(){
    private long itemCount=initialItemCount;
    @Override protected RawMessage computeNext(){
      if (initialItemCount == 0) {
        return endOfData();
      }
      try {
        if (itemCount == 0) {
          itemCount=decoder.arrayNext();
          if (itemCount == 0) {
            return endOfData();
          }
        }
        itemCount--;
        messageRecord=messageReader.read(messageRecord,decoder);
        return new RawMessage(Bytes.toBytes((ByteBuffer)messageRecord.get("String_Node_Str")),Bytes.toBytes((ByteBuffer)messageRecord.get("String_Node_Str")));
      }
 catch (      IOException e) {
        throw Throwables.propagate(e);
      }
    }
    @Override public void close(){
      urlConn.disconnect();
    }
  }
;
}

Fixed version (ground truth):
@Override public CloseableIterator<RawMessage> fetch() throws IOException, TopicNotFoundException {
  GenericRecord record=new GenericData.Record(Schemas.V1.ConsumeRequest.SCHEMA);
  if (getStartOffset() != null) {
    record.put("String_Node_Str",ByteBuffer.wrap(getStartOffset()));
  }
  if (getStartTime() != null) {
    record.put("String_Node_Str",getStartTime());
  }
  record.put("String_Node_Str",isIncludeStart());
  record.put("String_Node_Str",getLimit());
  if (getTransaction() != null) {
    record.put("String_Node_Str",ByteBuffer.wrap(TRANSACTION_CODEC.encode(getTransaction())));
  }
  URL url=remoteClient.resolve(createTopicPath(topicId) + "String_Node_Str");
  final HttpURLConnection urlConn=(HttpURLConnection)url.openConnection();
  urlConn.setConnectTimeout(HTTP_REQUEST_CONFIG.getConnectTimeout());
  urlConn.setReadTimeout(HTTP_REQUEST_CONFIG.getReadTimeout());
  urlConn.setRequestMethod("String_Node_Str");
  urlConn.setRequestProperty(HttpHeaders.CONTENT_TYPE,"String_Node_Str");
  urlConn.setDoInput(true);
  urlConn.setDoOutput(true);
  Encoder encoder=EncoderFactory.get().directBinaryEncoder(urlConn.getOutputStream(),null);
  DatumWriter<GenericRecord> datumWriter=new GenericDatumWriter<>(Schemas.V1.ConsumeRequest.SCHEMA);
  datumWriter.write(record,encoder);
  int responseCode=urlConn.getResponseCode();
  if (responseCode == HttpURLConnection.HTTP_NOT_FOUND) {
    throw new TopicNotFoundException(topicId.getNamespace(),topicId.getTopic());
  }
  handleError(responseCode,new Supplier<String>(){
    @Override public String get(){
      try (InputStream errorStream=urlConn.getErrorStream()){
        return errorStream == null ? "String_Node_Str" : new String(ByteStreams.toByteArray(errorStream),StandardCharsets.UTF_8);
      }
 catch (      IOException e) {
        return "String_Node_Str";
      }
 finally {
        urlConn.disconnect();
      }
    }
  }
,"String_Node_Str" + topicId);
  verifyContentType(urlConn.getHeaderFields(),"String_Node_Str");
  final InputStream inputStream=urlConn.getInputStream();
  final Decoder decoder=DecoderFactory.get().binaryDecoder(inputStream,null);
  final long initialItemCount=decoder.readArrayStart();
  return new AbstractCloseableIterator<RawMessage>(){
    private long itemCount=initialItemCount;
    @Override protected RawMessage computeNext(){
      if (initialItemCount == 0) {
        return endOfData();
      }
      try {
        if (itemCount == 0) {
          itemCount=decoder.arrayNext();
          if (itemCount == 0) {
            return endOfData();
          }
        }
        itemCount--;
        messageRecord=messageReader.read(messageRecord,decoder);
        return new RawMessage(Bytes.toBytes((ByteBuffer)messageRecord.get("String_Node_Str")),Bytes.toBytes((ByteBuffer)messageRecord.get("String_Node_Str")));
      }
 catch (      IOException e) {
        throw Throwables.propagate(e);
      }
    }
    @Override public void close(){
      Closeables.closeQuietly(inputStream);
      urlConn.disconnect();
    }
  }
;
}