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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4982) JournalNode should relogin from keytab before fetching logs from other JNs
Date Fri, 12 Jul 2013 17:45:48 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13707139#comment-13707139
] 

Todd Lipcon commented on HDFS-4982:
-----------------------------------

The release audit and eclipse errors are unrelated - this patch only adds 3 lines of code
to one file.

There are no unit tests added because we don't have any test infrastructure for krb5 testing.
But we will be deploying this soon and I'll report back if it doesn't solve the problem as
anticipated.

I'll commit this later today.
                
> JournalNode should relogin from keytab before fetching logs from other JNs
> --------------------------------------------------------------------------
>
>                 Key: HDFS-4982
>                 URL: https://issues.apache.org/jira/browse/HDFS-4982
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: journal-node, security
>    Affects Versions: 3.0.0, 2.1.0-beta
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-4982.txt
>
>
> We've seen an issue in a secure cluster where, after a failover, the new NN isn't able
to properly coordinate QJM recovery. The JNs fail to fetch logs from each other due to apparently
not having a Kerberos TGT. It seems that we need to add the {{checkTGTAndReloginFromKeytab}}
call prior to making the HTTP connection, since the java HTTP stuff doesn't do an automatic
relogin

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