Erro ao ler XML - Java

Stack trace do erro:

com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: Invalid byte 2 of 3-byte UTF-8 sequence.
        at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(UTF8Reader.java:684)
        at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(UTF8Reader.java:405)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1742)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.scanData(XMLEntityScanner.java:1242)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanCDATASection(XMLDocumentFragmentScannerImpl.java:1654)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2985)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
        at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:235)
        at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:284)
        at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:124)...

Solução:

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(streamResponse));
        
        String linha;
        StringBuilder buffer = new StringBuilder();
        while ((linha = bufferedReader.readLine()) != null)
            buffer.append(linha);
        bufferedReader.close();
        System.out.println("conteudo xml -> "+buffer);
        
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        dbf.setCoalescing(true);
        DocumentBuilder builder = dbf.newDocumentBuilder();
        Document doc = builder.parse(new ByteArrayInputStream(buffer.toString().trim().getBytes("UTF8")));

//linha com problema antigo.
Document doc = builder.parse(streamResponse)));

private HttpURLConnection createHttpConnection(String URL) throws Exception {
        URL url = new URL(URL);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setDoOutput(true);
        conn.setRequestMethod("GET");
        conn.setRequestProperty("Content-type", "text/xml; charset=UTF-8");
        return conn;
    }

    private InputStream getContentFromRequest(HttpURLConnection conn) throws Exception {
        // Obtém a resposta
        InputStream is = null;
        try {
            is = conn.getInputStream();
        } catch (Exception e) {
            e.printStackTrace();
            is = conn.getErrorStream();
        }
        return is;
    }