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Posted to dev@falcon.apache.org by "Pallavi Rao (JIRA)" <ji...@apache.org> on 2018/02/21 07:23:00 UTC
[jira] [Commented] (FALCON-2325) Kerberos Service Key refresh does
not happen
[ https://issues.apache.org/jira/browse/FALCON-2325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16371045#comment-16371045 ]
Pallavi Rao commented on FALCON-2325:
-------------------------------------
The only advantage of the method, checkTGTAndReloginFromKeytab() as opposed to
loginUserFromKeytab()
is that the method doesn't attempt actual login till the token is close to expiry (80% of ticket life has elapsed).
Upon, investigation found that
UserGroupInformation.checkTGTAndReloginFromKeytab() has the following check:
{quote}if (isSecurityEnabled() && this.user.getAuthenticationMethod() == UserGroupInformation.AuthenticationMethod.KERBEROS && this.isKeytab)
{quote}
this.isKeytab consistently returns false, although initial login uses keytab. As a result, this method call becomes a no-op.
The workaround to overcome this is to do a regular login, loginUserFromKeytab() instead of checkTGTAndReloginFromKeytab(), till the issue is addressed in hadoop-auth.
> Kerberos Service Key refresh does not happen
> --------------------------------------------
>
> Key: FALCON-2325
> URL: https://issues.apache.org/jira/browse/FALCON-2325
> Project: Falcon
> Issue Type: Bug
> Reporter: Pallavi Rao
> Assignee: Pallavi Rao
> Priority: Major
>
> For both Prism and Falcon Servers, Kerberos ticket does not get refreshed although,
> AuthenticationInitializationService, does a
> checkTGTAndReloginFromKeytab() periodically.
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