连接到Kerberrized HDFS时，java.lang.IllegalArgumentException：未能指定服务器的Kerberos主体名称；

Question

Configuration config = new Configuration();
config.set("hadoop.security.authentication", "Kerberos");

UserGroupInformation.setConfiguration(config);
UserGroupInformation ugi = null;
ugi = UserGroupInformation.loginUserFromKeytabAndReturnUGI("me@EXAMPLE>COM","me.keytab");
model = ugi.doAs((PrivilegedExceptionAction<Map<String,Object>>) () -> { 
  testHadoop(hcb.gethDFSConfigBean());
  return null;
});

请看下面的堆栈跟踪

java.io.IOException: Failed on local exception: java.io.IOException: java.lang.IllegalArgumentException: Failed to specify server's Kerberos principal name; Host Details : local host is: "Securonix-int3.local/10.0.4.36"; destination host is: "sobd189.securonix.com":8020; 
    at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:772)
    at org.apache.hadoop.ipc.Client.call(Client.java:1472)
    at org.apache.hadoop.ipc.Client.call(Client.java:1399)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
    at com.sun.proxy.$Proxy9.getFileInfo(Unknown Source)
    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:752)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
    at com.sun.proxy.$Proxy10.getFileInfo(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1988)
    at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1118)
    at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1114)
    at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
    at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1114)
    at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1400)
    at com.securonix.application.ui.uiUtil.SnyperUIUtil.lambda$main$4(SnyperUIUtil.java:1226)
    at com.securonix.application.ui.uiUtil.SnyperUIUtil$$Lambda$6/1620890840.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
    at com.securonix.application.ui.uiUtil.SnyperUIUtil.main(SnyperUIUtil.java:1216)
Caused by: java.io.IOException: java.lang.IllegalArgumentException: Failed to specify server's Kerberos principal name
    at org.apache.hadoop.ipc.Client$Connection$1.run(Client.java:680)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
    at org.apache.hadoop.ipc.Client$Connection.handleSaslConnectionFailure(Client.java:643)
    at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:730)
    at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)
    at org.apache.hadoop.ipc.Client.getConnection(Client.java:1521)
    at org.apache.hadoop.ipc.Client.call(Client.java:1438)
    ... 23 more
Caused by: java.lang.IllegalArgumentException: Failed to specify server's Kerberos principal name
    at org.apache.hadoop.security.SaslRpcClient.getServerPrincipal(SaslRpcClient.java:322)
    at org.apache.hadoop.security.SaslRpcClient.createSaslClient(SaslRpcClient.java:231)
    at org.apache.hadoop.security.SaslRpcClient.selectSaslClient(SaslRpcClient.java:159)
    at org.apache.hadoop.security.SaslRpcClient.saslConnect(SaslRpcClient.java:396)
    at org.apache.hadoop.ipc.Client$Connection.setupSaslConnection(Client.java:553)
    at org.apache.hadoop.ipc.Client$Connection.access$1800(Client.java:368)
    at org.apache.hadoop.ipc.Client$Connection$2.run(Client.java:722)
    at org.apache.hadoop.ipc.Client$Connection$2.run(Client.java:718)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
    at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:717)

在启用了Kerberos的调试代码之后，当我调用filesystem.get（）时，我得到了下面的调试日志；Kerberor调试日志：

Java配置名称：null Java配置名称：null Native config名称：/etc/krb5.conf Native config名称：/etc/krb5.conf从Native config加载从Native config加载16/02/22 15:53:14 WARN Util.NativEcodeLoader：无法为您的平台加载Native Hadoop库...在适用的情况下使用builtin-java类
Java配置名称：null Java配置名称：null Native config名称：/etc/krb5.conf Native config名称：/etc/krb5.conf Loaded from Native config Loaded from Native config

 >>>KinitOptions cache name is /tmp/krb5cc_501
 >> Acquire default native Credentials
 default etypes for default_tkt_enctypes: 18 18 16.
 >>> Found no TGT's in LSA

Answer 1

我认为问题在于HDFS希望配置具有dfs.datanode.kerberos.principal的值，该值是datanodes的主体，但在本例中缺少该值。

当我只从core-site.xml创建配置实例而忘记添加hdfs-site.xml时，我也遇到了同样的问题。我一添加hdfs-site.xml，它就开始工作了，hdfs-site.xml有：

 <property>
      <name>dfs.datanode.kerberos.principal</name>
      <value>....</value>
 </property>

希望这能有所帮助。