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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10078) KerberosAuthenticator always does SPNEGO
Date Wed, 13 Nov 2013 20:31:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13821795#comment-13821795
] 

Alejandro Abdelnur commented on HADOOP-10078:
---------------------------------------------

+1

> KerberosAuthenticator always does SPNEGO
> ----------------------------------------
>
>                 Key: HADOOP-10078
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10078
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.0.3-alpha
>            Reporter: Robert Kanter
>            Assignee: Robert Kanter
>            Priority: Minor
>         Attachments: HADOOP-10078.patch
>
>
> HADOOP-8883 made this change to {{KerberosAuthenticator}}
> {code:java}
> @@ -158,7 +158,7 @@ public class KerberosAuthenticator implements Authenticator {
>        conn.setRequestMethod(AUTH_HTTP_METHOD);
>        conn.connect();
>        
> -      if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
> +      if (conn.getRequestProperty(AUTHORIZATION) != null && conn.getResponseCode()
== HttpURLConnection.HTTP_OK) {
>          LOG.debug("JDK performed authentication on our behalf.");
>          // If the JDK already did the SPNEGO back-and-forth for
>          // us, just pull out the token.
> {code}
> to fix OOZIE-1010.  However, as [~aklochkov] pointed out recently, this inadvertently
made the if statement always false because it turns out that the JDK excludes some headers,
including the "Authorization" one that we're checking (see discussion [here|https://issues.apache.org/jira/browse/HADOOP-8883?focusedCommentId=13807596&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13807596]).
 This means that it was always either calling {{doSpnegoSequence(token);}} or {{getFallBackAuthenticator().authenticate(url,
token);}}, which is actually the old behavior that existed before HADOOP-8855 changed it in
the first place.
> In any case, I tried removing the "Authorization" check and Oozie still works with and
without Kerberos; the NPE reported in OOZIE-1010 has since been properly fixed due as a side
effect for a similar issue in OOZIE-1368.



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