CDH 组件 Kerberos  认证失败，报错如下：

Caused by: javax.security.auth.login.LoginException: Cannot locate KDC
	at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:804)
	at com.sun.security.auth.module.Krb5LoginModule.login(Krb5LoginModule.java:617)
	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:498)
	at javax.security.auth.login.LoginContext.invoke(LoginContext.java:755)
	at javax.security.auth.login.LoginContext.access$000(LoginContext.java:195)
	at javax.security.auth.login.LoginContext$4.run(LoginContext.java:682)
	at javax.security.auth.login.LoginContext$4.run(LoginContext.java:680)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:680)
	at javax.security.auth.login.LoginContext.login(LoginContext.java:587)
	at org.apache.kafka.common.security.authenticator.AbstractLogin.login(AbstractLogin.java:60)
	at org.apache.kafka.common.security.kerberos.KerberosLogin.login(KerberosLogin.java:103)
	at org.apache.kafka.common.security.authenticator.LoginManager.<init>(LoginManager.java:62)
	at org.apache.kafka.common.security.authenticator.LoginManager.acquireLoginManager(LoginManager.java:112)
	at org.apache.kafka.common.network.SaslChannelBuilder.configure(SaslChannelBuilder.java:158)
	... 10 more
Caused by: KrbException: Cannot locate KDC
	at sun.security.krb5.Config.getKDCList(Config.java:1084)
	at sun.security.krb5.KdcComm.send(KdcComm.java:218)
	at sun.security.krb5.KdcComm.send(KdcComm.java:200)
	at sun.security.krb5.KrbAsReqBuilder.send(KrbAsReqBuilder.java:316)
	at sun.security.krb5.KrbAsReqBuilder.action(KrbAsReqBuilder.java:361)
	at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:776)
	... 27 more
Caused by: KrbException: Generic error (description in e-text) (60) - Unable to locate KDC for realm

解决办法：

设置：System.setProperty("java.security.krb5.conf", "/xxx/krb5.conf");

或者将krb5.conf 放到 /etc 下