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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3897) QJM: TestBlockToken fails after HDFS-3893
Date Fri, 07 Sep 2012 01:53:07 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3897?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Aaron T. Myers updated HDFS-3897:

    Attachment: HDFS-3897.patch

Here's a patch which addresses the issue. Previous to HDFS-3893, this test case was only inadvertently
working since the testBlockTokenInLastLocatedBlock test case creates its own Configuration
object (i.e. doesn't reuse the static one in the test class) and when starting the NN in the
MiniDFSCluster this would cause {{UserGroupInformation#setConfiguration}} to be called with
a Configuration object which had security disabled, thereby globally disabling Kerberos.

The fix is to only enable Kerberos in the conf for those test cases that actually require
it for the functionality they aim to test. This patch also causes Kerberos to be disabled
before each test case is run, which should make the whole test less fragile. (Previously,
testBlockTokenRpc and testBlockTokenRpcLeak would fail if testBlockTokenInLastLocatedBlock
happened to be run before them.)

I tested this patch by running TestBlockToken and all of the QJM tests. They all pass with
this patch applied.
> QJM: TestBlockToken fails after HDFS-3893
> -----------------------------------------
>                 Key: HDFS-3897
>                 URL: https://issues.apache.org/jira/browse/HDFS-3897
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>    Affects Versions: QuorumJournalManager (HDFS-3077)
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>         Attachments: HDFS-3897.patch
> HDFS-3893 caused the NN to log in using its configured Kerberos credentials when formatting
the NN. This caused TestBlockToken#testBlockTokenInLastLocatedBlock to begin failing, since
the test enables Kerberos but doesn't configure the NN principal or keytab.

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