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https://issues.apache.org/jira/browse/HADOOP-9975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770003#comment-13770003
]
Kai Zheng commented on HADOOP-9975:
-----------------------------------
Based on the work by HADOOP-9797 and the family, it’s easy to implement this as
the new codes almost support it already introducing kerberosRelogin() method
when refactoring the codes for reloginFromKeytab() etc as follows.
{code}
public interface HadoopLogin {
public void login() throws HadoopLoginException;
public void logout() throws HadoopLoginException;
public void relogin() throws HadoopLoginException;
...
public class AbstractHadoopLogin implements HadoopLogin {
…
public void relogin() throws HadoopLoginException {
logout();
login();
}
…
{code}
UGI saves HadoopLoign object, which can be used to do relogin(), as follows
{code}
Public class UserGroupInformation {
private HadoopLogin login;
public synchronized void kerberosRelogin() throws IOException {
login.relogin();
}
public synchronized void reloginFromKeytab() throws IOException {
kerberosRelogin();
}
public synchronized void reloginFromTicketCache() throws IOException {
kerberosRelogin();
}
…
{code}
Here it’s only needed to rename the kerberosRelogin() method to relogin().
> Adding relogin() method to UGI
> ------------------------------
>
> Key: HADOOP-9975
> URL: https://issues.apache.org/jira/browse/HADOOP-9975
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Kai Zheng
> Assignee: Kai Zheng
>
> In current Hadoop UGI implementation, it has API methods like
> reloginFromKeytab() and reloginFromTicketCache(). However, such methods are
> too Kerberos specific and also involves login implementation details, it
> would be better to add generic relogin() method regardless authentication
> mechanism. This is possible since relevant authentication specific parameters
> like principal and keytab are already passed and saved in the UGI object
> after initial login.
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