Question

我正在使用JUnit测试JERSEY Client + HTTPS来测试secure web service上运行的Jetty。在wr.get( ClientResponse.class)的每个块之后，我对9-10 requests的一次调用会挂起10秒钟。等效的Apache client代码在几毫秒内运行。如果我切换Jetty to HTTP模式，问题就会消失。

我正在使用Jersey bundle & client 1.14 and Jetty 6.1.26

apache客户端工作

@Test
public void testApacheClient() throws Exception
{
  HttpClient client = new HttpClient();
  ProtocolSocketFactory socketFactory = new EasySSLProtocolSocketFactory();
  Protocol https = new Protocol( "https", socketFactory, 443 );
  Protocol.registerProtocol( "https", https );

  //Finishes in < 1 second
  for ( int i = 0; i < 30; i++ )
  {
    GetMethod getMethod = new GetMethod( "https://localhost:8443/home" );
    client.executeMethod( getMethod );
    String entity = getMethod.getResponseBodyAsString();
    getMethod.releaseConnection();
  }
}

泽西岛客户端挂起

@Test
public void testJerseyClient() throws Exception

  HostnameVerifier hv = getHostnameVerifier();
  ClientConfig config = new DefaultClientConfig();
  SSLContext ctx = getSslContext();
  config.getProperties().put( HTTPSProperties.PROPERTY_HTTPS_PROPERTIES,
      new HTTPSProperties( hv, ctx ) );

  Client jerseyClient = Client.create( config );

  //Finishes in < 1 second
  for ( int i = 0; i < 30; i++ )
  {
    WebResource wr = jerseyClient.resource( "https://www.google.com" );
    ClientResponse cr = wr.get( ClientResponse.class );
    String entity = cr.getEntity( String.class );
    cr.close();
  }

  /* Pauses for 10 seconds after the 10th request, and subsequently after every 9th request.
     Debugging shows waiting at line 'ClientResponse cr = ...'
   */
  for ( int i = 0; i < 30; i++ )
  {
    WebResource wr = jerseyClient.resource( "https://localhost:8443/home" );
    ClientResponse cr = wr.get( ClientResponse.class );  //10 second pause after requests 9, 18, 27
    String entity = cr.getEntity( String.class ); //This is triggering the problem
    cr.close();
  }

  //Finishes in < 1 second
  for ( int i = 0; i < 30; i++ )
  {
    WebResource wr = jerseyClient.resource( "https://localhost:8443/home" );
    ClientResponse cr = wr.get( ClientResponse.class );
    cr.close();
  }
}

从ClientResponse检索实体似乎会触发此问题，但仅限于HTTPS模式并针对我的网络服务器（而不是google, facebook, etc）运行。我在Jersey ServletContainer and Struts ActionServlet上运行Jetty，两者都出现了问题。我还在subnet上的不同机器上运行Web服务器，并从多台机器上测试单元。

泽西HTTPS类

private HostnameVerifier getHostnameVerifier() {
  HostnameVerifier hv = new HostnameVerifier() {
    public boolean verify( String arg0, SSLSession arg1 ) { return true; }
  };
  return hv;
}

private SSLContext getSslContext() throws Exception {      
  private final SSLContext sslContext = SSLContext.getInstance( "SSL" );
  sslContext.init( null, new TrustManager[] { new X509TrustManager() {
        public X509Certificate[] getAcceptedIssuers() { return new X509Certificate[0]; }
        public void checkClientTrusted( X509Certificate[] certs, String authType ) {}
        public void checkServerTrusted( X509Certificate[] certs, String authType ) {}
      }
    }, new SecureRandom()
  );
  return sslContext;
}

Jetty SSL连接器。如果我使用SelectChannelConnector并使用HTTP进行单元测试，则问题就会消失。

<Call name="addConnector">
  <Arg>
    <New class="org.mortbay.jetty.security.SslSocketConnector">
      <Set name="allowRenegotiate">true</Set>
      <Set name="Port">8443</Set>
      <Set name="reuseAddress">true</Set>
      <Set name="Host">mgmt-int</Set>
      <Set name="maxIdleTime">30000</Set>
      <Set name="handshakeTimeout">2000</Set>
      <Set name="keystore"><SystemProperty name="jetty.home" default="/usr/app/web-app"/>/conf/keystore.jetty</Set>
      <Set name="password">OBF:1vaaaaaaaaaaaaaaaaaaaa111111111v</Set>
      <Set name="keyPassword">OBF:1vaaaaaaaaaaaaaaaaaaaa111111111v</Set>
    </New>
  </Arg>
</Call>

Answer 1

这些运行的操作系统是什么？

只是一个猜测，但它可能与缓慢的/dev/random实施（通过SecureRandom）有关。

此处相关讨论：

How to solve performance problem with Java SecureRandom?

由于我无法始终在Web应用程序中控制JVM参数，因此我一直在使用此作为解决方法：

static {
    System.setProperty("java.security.egd", "file:///dev/urandom");
}

不知道是否严格意义上这是推荐的（但它解决了我的问题）。

Answer 2

尝试稍微修改您的trustManager实现：

TrustManager[] trustAllCerts = new TrustManager[] {
        new X509TrustManager() {
            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }

            public void checkClientTrusted(X509Certificate[] certs, String authType) {
                // Trust always
            }

            public void checkServerTrusted(X509Certificate[] certs, String authType) {
                // Trust always
            }
        }
    };

另外，不要忘记在getSSLContext（）方法结束时调用HttpsURLConnection.setDefaultSocketFactory：

HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());

Jersey客户端HTTPS性能问题

2 个答案: