我正在尝试使用以下代码连接到 Kerberized hdfs 集群，使用以下相同的代码，我当然可以使用 HBaseConfiguration 访问 hbase，
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;
});
我已经能够使用相同的 key 表和主体成功访问 Solr、Impala，我遇到了这个奇怪的问题，无法找到 hdfs 的服务名称。
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)
在我为 Kerberos 启用调试代码后，当我调用 FileSystem.get(); 时，我得到了以下调试日志；
Kerberor 调试日志:
Java 配置名称:空 Java 配置名称:空
native 配置名称:/etc/krb5.conf native 配置名称:/etc/krb5.conf
从 native 配置加载 从 native 配置加载
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内置 Java 类
Java 配置名称:空 Java 配置名称:空
native 配置名称:/etc/krb5.conf native 配置名称:/etc/krb5.conf
从 native 配置加载 从 native 配置加载
有趣的是，当我使用文件系统的 api 时，如 hdfs.exists()
>>>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
最佳答案
我认为问题在于 HDFS 期望配置具有 dfs.datanode.kerberos.principal 的值，这是数据节点的主体，在这种情况下它丢失了。
当我仅从 core-site.xml 创建 Configuration 实例并忘记添加 hdfs-site.xml 时，我遇到了同样的问题。一旦我添加了 hdfs-site.xml 它就开始工作了，并且 hdfs-site.xml 有:
<property>
<name>dfs.datanode.kerberos.principal</name>
<value>....</value>
</property>
希望这可以帮助。
关于java - 连接到 Kerberrized HDFS , java.lang.IllegalArgumentException : Failed to specify server's Kerberos principal name;，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/35325720/