什么是Kerberos方法？

Question

I'm trying to connect to hive with jdbc. I keep getting this error. I tried looking it up but could not hind anything useful .

This is my connection string: jdbc:hive2://hostname.xxx.com:10000/default;principal=hive/hostname.xxx.com@HADOOP_ENV.COM

What is this error: java.lang.NoSuchMethodError: org.apache.hadoop.security.authentication.util.KerberosUtil.hasKerberosTicket(Ljavax/security/auth/Subject;)Z

Answer 1

That method exists in Hadoop 2.8 but not in Hadoop 2.7 -- so my guess is that your project dependencies are not aligned with whatever version of Hadoop you have in Production .

Code in trunk
https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/KerberosUtil.java

code in branch-2.8.0
https://github.com/apache/hadoop/blob/branch-2.8.0/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/KerberosUtil.java

code in branch-2.7.4
https://github.com/apache/hadoop/blob/branch-2.7.4/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/KerberosUtil.java

Answer 2

Kerberos is an authentication protocol that is used by Hive server ( https://en.wikipedia.org/wiki/Kerberos_(protocol) )

The problem you are setting is more about a missing library in our pom.xml. Have you include <artifactId>hive-jdbc</artifactId> ?

Answer 3

I think your keberos ticket is not generated properly

Can you try running these two commands in order from the user you are trying to connect:

1. kdestroy (deleted any kerberos ticket generated before)
2. kinit (generates a new ticket)

Then try to connect again.