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https://issues.apache.org/jira/browse/HADOOP-10786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14204812#comment-14204812
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Hudson commented on HADOOP-10786:
---------------------------------
FAILURE: Integrated in Hadoop-Hdfs-trunk #1929 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1929/])
HADOOP-10786. Fix UGI#reloginFromKeytab on Java 8. Contributed by Stephen Chu.
(wheat9: rev a37a993453c02048a618f71b5b9bc63b5a44dbf6)
*
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/security/TestUGILoginFromKeytab.java
* hadoop-common-project/hadoop-common/CHANGES.txt
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java
HADOOP-10786. Moved to hadoop-2.7.X. (acmurthy: rev
14b87b70a8dfc03801dcf5f33caa7fd2cc589840)
* hadoop-common-project/hadoop-common/CHANGES.txt
> Fix UGI#reloginFromKeytab on Java 8
> -----------------------------------
>
> Key: HADOOP-10786
> URL: https://issues.apache.org/jira/browse/HADOOP-10786
> Project: Hadoop Common
> Issue Type: Improvement
> Components: security
> Affects Versions: 2.6.0
> Reporter: Tobi Vollebregt
> Assignee: Stephen Chu
> Fix For: 2.7.0
>
> Attachments: HADOOP-10786.2.patch, HADOOP-10786.3.patch,
> HADOOP-10786.3.patch, HADOOP-10786.4.patch, HADOOP-10786.5.patch,
> HADOOP-10786.patch
>
>
> Krb5LoginModule changed subtly in java 8: in particular, if useKeyTab and
> storeKey are specified, then only a KeyTab object is added to the Subject's
> private credentials, whereas in java <= 7 both a KeyTab and some number of
> KerberosKey objects were added.
> The UGI constructor checks whether or not a keytab was used to login by
> looking if there are any KerberosKey objects in the Subject's private
> credentials. If there are, then isKeyTab is set to true, and otherwise it's
> set to false.
> Thus, in java 8 isKeyTab is always false given the current UGI
> implementation, which makes UGI#reloginFromKeytab fail silently.
> Attached patch will check for a KeyTab object on the Subject, instead of a
> KerberosKey object. This fixes relogins from kerberos keytabs on Oracle java
> 8, and works on Oracle java 7 as well.
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