hive0.11 hiveserver custom认证bug


 最近在测试hive0.11 hiveserver时遇到的一个关于认证的bug,具体表现:
在配置中指定了custom的认证方式时,通过beeline连接hiveserver2,发现连接hang住。
hive配置:

<property>
<name>hive.server2.authentication</name>a
<value>CUSTOM</value>
</property>
<property>
<name>hive.server2.custom.authentication.class</name>
<value>com.vipshop.hive.service.AuthWithPasswd</value>
</property>

查看hiveserver的日志,发现有如下报错:

15/01/08 17:54:59 ERROR server.TThreadPoolServer: Error occurred during processing of message.
java.lang.RuntimeException: java.lang.NoSuchMethodException: org.apache.hive.service.auth.PasswdAuthenticationProvider.<init>()
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:131)
        at org.apache.hive.service.auth.CustomAuthenticationProviderImpl.<init>(CustomAuthenticationProviderImpl.java:52)
        at org.apache.hive.service.auth.AuthenticationProviderFactory.getAuthenticationProvider(AuthenticationProviderFactory.java:62)
        at org.apache.hive.service.auth.PlainSaslHelper$PlainServerCallbackHandler.handle(PlainSaslHelper.java:73)
        at org.apache.hive.service.auth.PlainSaslServer.evaluateResponse(PlainSaslServer.java:102)
        at org.apache.thrift.transport.TSaslTransport$SaslParticipant.evaluateChallengeOrResponse(TSaslTransport.java:509)
        at org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:264)
        at org.apache.thrift.transport.TSaslServerTransport.open(TSaslServerTransport.java:41)
        at org.apache.thrift.transport.TSaslServerTransport$Factory.getTransport(TSaslServerTransport.java:216)
        at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:189)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NoSuchMethodException: org.apache.hive.service.auth.PasswdAuthenticationProvider.<init>()
        at java.lang.Class.getConstructor0(Class.java:2706)
        at java.lang.Class.getDeclaredConstructor(Class.java:1985)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:125)
        ... 12 more

注释掉hive.server2.authentication的配置(即使用默认的none)后正常。这其实是hive0.11.0中的bug,在hive0.13.0中fix,bug id:

https://issues.apache.org/jira/browse/HIVE-4778
下面分析下具体涉及的类:
org.apache.hive.service.auth.HiveAuthFactory中的AuthTypes定义了多种认证方法(NONE,LDAP,KERBEROS,CUSTOM,PAM(hive0.11不支持)等)这里我们用到了CUSTOM,基于user和password的认证方式,涉及到PasswdAuthenticationProvider和CustomAuthenticationProviderImpl类

1)org.apache.hive.service.auth.PasswdAuthenticationProvider是一个基于用户名和密码验证的接口,主要定义了一个抽象方法Authenticate (参数就是用户名和密码)
2)org.apache.hive.service.auth.AnonymousAuthenticationProviderImpl类实现了PasswdAuthenticationProvider接口,提供了一个空的Authenticate方法(直接return)
3)org.apache.hive.service.auth.AuthenticationProviderFactory定义了一个AuthMethods的enum类,定义了有效的认证方法(hive0.13:LDAP/PAM/CUSTOM/NONE,hive0.11:LDAP/CUSTOM/NONE),并提供了对应的封装,同时定义了一个getAuthenticationProvider方法,用来返回对应的 AuthMethods的具体实现类:

  public static PasswdAuthenticationProvider getAuthenticationProvider(AuthMethods authMethod)
      throws AuthenticationException {
    if (authMethod.equals(AuthMethods.LDAP)) {
      return new LdapAuthenticationProviderImpl();
    }
    else if (authMethod.equals(AuthMethods.PAM)) {
      return new PamAuthenticationProviderImpl();
    }
    else if (authMethod.equals(AuthMethods.CUSTOM)) {
      return new CustomAuthenticationProviderImpl();
    }
    else if (authMethod.equals(AuthMethods.NONE)) {
      return new AnonymousAuthenticationProviderImpl();
    }
    else {
      throw new AuthenticationException("Unsupported authentication method");
    }
  }

4)org.apache.hive.service.auth.CustomAuthenticationProviderImpl
PasswdAuthenticationProvider接口的具体实现类
在hive0.13中的实现:

public class CustomAuthenticationProviderImpl implements PasswdAuthenticationProvider {
  Class<? extends PasswdAuthenticationProvider> customHandlerClass;
  PasswdAuthenticationProvider customProvider;
  @SuppressWarnings("unchecked")
  CustomAuthenticationProviderImpl () {
    HiveConf conf = new HiveConf();
    this.customHandlerClass = (Class<? extends PasswdAuthenticationProvider>)
        conf.getClass( 
            HiveConf.ConfVars.HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS.varname, //即hive.server2.custom.authentication.class
            PasswdAuthenticationProvider.class);
    //HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS("hive.server2.custom.authentication.class", null),
    this.customProvider =
        ReflectionUtils.newInstance(this.customHandlerClass, conf); //反射调用,生成class的实例
  }
  @Override
  public void Authenticate(String user, String  password) //实现具体的Authenticate方法,用于实现的验证
      throws AuthenticationException {
    this.customProvider.Authenticate(user, password);
  }
}

hive0.11中的实现:

public class CustomAuthenticationProviderImpl
  implements PasswdAuthenticationProvider {
  Class<? extends PasswdAuthenticationProvider> customHandlerClass;
  PasswdAuthenticationProvider customProvider;
  @SuppressWarnings("unchecked")
  CustomAuthenticationProviderImpl () {
    HiveConf conf = new HiveConf();
    this.customHandlerClass = (Class<? extends PasswdAuthenticationProvider>)
        conf.getClass(
            HiveConf.ConfVars.HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS.name(), //即HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS
            PasswdAuthenticationProvider.class);
    this.customProvider =
        ReflectionUtils.newInstance(this.customHandlerClass, conf);
  }
  @Override
  public void Authenticate(String user, String  password)
      throws AuthenticationException {
    this.customProvider.Authenticate(user, password);
  }
}

不同的就是customHandlerClass 的获取方法,这里我们手动测试下:

import java.lang.*;
public class HiveConf{
  public static enum ConfVars {
    PLAN_SERIALIZATION("hive.plan.serialization.format","kryo"),
    HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS("hive.server2.custom.authentication.class", null),
    ;
    public final String varname;
    public final String defaultVal;
    ConfVars(String varname, String defaultVal) {
      this.varname = varname;
      this.defaultVal = defaultVal;
    }
    public String toString() {
      return varname;
    }
    }
    public static void main(String args[]) {
        System.out.println("ConfVars List:");
        for(ConfVars c:ConfVars.values()){ //ConfVars.values()是所有enum的值
            System.out.println(c  + " is: " + c);
//hive.server2.custom.authentication.class is: hive.server2.custom.authentication.class
            System.out.println(c  + " varname: " + c.varname); //可以看到这里varname是enum元素定义的值的名称,而name()是enum元素的名称
//hive.server2.custom.authentication.class varname: hive.server2.custom.authentication.class
            System.out.println(c  + " name(): " + c.name());
//hive.server2.custom.authentication.class name(): HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS
        }
        System.out.println(HiveConf.ConfVars.HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS.name()); //HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS
        System.out.println(HiveConf.ConfVars.HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS.varname); //hive.server2.custom.authentication.class
    }
}

可以看到使用HiveConf.ConfVars.HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS.varname时,this.customHandlerClass的结果为具体的实现类(即hive.server2.custom.authentication.class设置的类)比如class com.vipshop.hive.service.AuthWithPasswd,而使用HiveConf.ConfVars.HIVE_SERVER2_CUSTOM_AUTHENTICATION_CLASS.name()时,返回的是接口,即interface org.apache.hive.service.auth.PasswdAuthenticationProvider
再来看ReflectionUtils.newInstance方法:

private static final Class<?>[] EMPTY_ARRAY = new Class[]{};
....
  public static <T> T newInstance(Class<T> theClass, Configuration conf) {
    T result;
    try {
      Constructor<T> meth = (Constructor<T>) CONSTRUCTOR_CACHE.get(theClass);
      if (meth == null) {
        meth = theClass.getDeclaredConstructor(EMPTY_ARRAY);  //返回类的构造函数对象
        meth.setAccessible(true);
        CONSTRUCTOR_CACHE.put(theClass, meth);
      }
      result = meth.newInstance();
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
    setConf(result, conf);
    return result;
  }

在hive0.11时这里theClass为org.apache.hive.service.auth.PasswdAuthenticationProvider,org.apache.hive.service.auth.PasswdAuthenticationProvider是一个接口,没有定义构造函数,因此会抛出异常。
再来看认证的配置是在什么时候加载的?我们通过指定一个错误的配置来看其报错堆栈:
使用如下命令开启hiveserver的debug log:

bin/hiveserver2 -hiveconf hive.root.logger=DEBUG,console start
15/01/08 17:56:55 INFO service.AbstractService: Service:ThriftBinaryCLIService is started.
15/01/08 17:56:55 INFO service.AbstractService: Service:HiveServer2 is started.
15/01/08 17:56:55 ERROR thrift.ThriftCLIService: Error: 
javax.security.auth.login.LoginException: Unsupported authentication type CUSTEM
        at org.apache.hive.service.auth.HiveAuthFactory.getAuthTransFactory(HiveAuthFactory.java:148)
        at org.apache.hive.service.cli.thrift.ThriftBinaryCLIService.run(ThriftBinaryCLIService.java:43)
        at java.lang.Thread.run(Thread.java:662)

在hiveserver2正常启动时默认会启动ThriftBinaryCLIService服务:
在ThriftBinaryCLIService 类的run方法:

  public void run() {
    try {
      hiveAuthFactory = new HiveAuthFactory();  //run方法中首先会声明一个HiveAuthFactory对象
      TTransportFactory  transportFactory = hiveAuthFactory.getAuthTransFactory(); //调用HiveAuthFactory的getAuthTransFactory方法获取
对应的TTransportFactory对象  
      TProcessorFactory processorFactory = hiveAuthFactory.getAuthProcFactory(this);
.....

而在HiveAuthFactory的构造函数中会解析hive的配置,获取对应的hiveserver的认证设置:

  public HiveAuthFactory() throws TTransportException {
    conf = new HiveConf();
    transportMode = conf.getVar(HiveConf.ConfVars.HIVE_SERVER2_TRANSPORT_MODE);
//HIVE_SERVER2_TRANSPORT_MODE("hive.server2.transport.mode", "binary",new StringsValidator("binary", "http")),
    authTypeStr = conf.getVar(HiveConf.ConfVars.HIVE_SERVER2_AUTHENTICATION);
//HIVE_SERVER2_AUTHENTICATION("hive.server2.authentication", "NONE", new StringsValidator("NOSASL", "NONE", "LDAP", "KERBEROS", "PAM", "CUSTOM")),
默认为null,有效值为"NOSASL", "NONE", "LDAP", "KERBEROS", "PAM", "CUSTOM"
    // In http mode we use NOSASL as the default auth type
    if (transportMode.equalsIgnoreCase("http")) {
      if (authTypeStr == null) {
        authTypeStr = AuthTypes.NOSASL.getAuthName();
      }
    }
    else {
      if (authTypeStr == null) {
        authTypeStr = AuthTypes.NONE.getAuthName();
      }
      if (authTypeStr.equalsIgnoreCase(AuthTypes.KERBEROS.getAuthName())
          && ShimLoader.getHadoopShims().isSecureShimImpl()) {
        saslServer = ShimLoader.getHadoopThriftAuthBridge().createServer(
            conf.getVar(ConfVars.HIVE_SERVER2_KERBEROS_KEYTAB),
            conf.getVar(ConfVars.HIVE_SERVER2_KERBEROS_PRINCIPAL)
            );
        // start delegation token manager
        try {
          saslServer.startDelegationTokenSecretManager(conf, null);
        } catch (IOException e) {
          throw new TTransportException("Failed to start token manager", e);
        }
      }
    }
  }

getAuthTransFactory方法会判断authTypeStr是否为有效值,否则抛出异常,退出启动

  public TTransportFactory getAuthTransFactory() throws LoginException {
    TTransportFactory transportFactory;
    if (authTypeStr.equalsIgnoreCase(AuthTypes.KERBEROS.getAuthName())) {
      try {
        transportFactory = saslServer.createTransportFactory(getSaslProperties());
      } catch (TTransportException e) {
        throw new LoginException(e.getMessage());
      }
    } else if (authTypeStr.equalsIgnoreCase(AuthTypes.NONE.getAuthName())) {
      transportFactory = PlainSaslHelper.getPlainTransportFactory(authTypeStr);
    } else if (authTypeStr.equalsIgnoreCase(AuthTypes.LDAP.getAuthName())) {
      transportFactory = PlainSaslHelper.getPlainTransportFactory(authTypeStr);
    } else if (authTypeStr.equalsIgnoreCase(AuthTypes.PAM.getAuthName())) {
      transportFactory = PlainSaslHelper.getPlainTransportFactory(authTypeStr);
    } else if (authTypeStr.equalsIgnoreCase(AuthTypes.NOSASL.getAuthName())) {
      transportFactory = new TTransportFactory();
    } else if (authTypeStr.equalsIgnoreCase(AuthTypes.CUSTOM.getAuthName())) {
      transportFactory = PlainSaslHelper.getPlainTransportFactory(authTypeStr);
    } else {
      throw new LoginException("Unsupported authentication type " + authTypeStr);
    }
    return transportFactory;
  }

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