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From "Alex Ivanov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13487) Hadoop KMS should load old delegation tokens from Zookeeper on startup
Date Tue, 23 Aug 2016 23:11:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15433828#comment-15433828
] 

Alex Ivanov commented on HADOOP-13487:
--------------------------------------

Thank you for clarifying, [~xiaochen], and for submitting a patch so promptly!

> Hadoop KMS should load old delegation tokens from Zookeeper on startup
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-13487
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13487
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: kms
>    Affects Versions: 2.6.0
>            Reporter: Alex Ivanov
>            Assignee: Xiao Chen
>             Fix For: 2.8.0, 3.0.0-alpha2
>
>         Attachments: HADOOP-13487.01.patch, HADOOP-13487.02.patch, HADOOP-13487.03.patch,
HADOOP-13487.04.patch, HADOOP-13487.05.patch
>
>
> Configuration:
> CDH 5.5.1 (Hadoop 2.6+)
> KMS configured to store delegation tokens in Zookeeper
> DEBUG logging enabled in /etc/hadoop-kms/conf/kms-log4j.properties
> Findings:
> It seems to me delegation tokens never get cleaned up from Zookeeper past their renewal
date. I can see in the logs that the removal thread is started with the expected interval:
> {code}
> 2016-08-11 08:15:24,511 INFO  AbstractDelegationTokenSecretManager - Starting expired
delegation token remover thread, tokenRemoverScanInterval=60 min(s)
> {code}
> However, I don't see any delegation token removals, indicated by the following log message:
> org.apache.hadoop.security.token.delegation.ZKDelegationTokenSecretManager --> removeStoredToken(TokenIdent
ident), line 769 [CDH]
> {code}
>     if (LOG.isDebugEnabled()) {
>       LOG.debug("Removing ZKDTSMDelegationToken_"
>           + ident.getSequenceNumber());
>     }
> {code}
> Meanwhile, I see a lot of expired delegation tokens in Zookeeper that don't get cleaned
up.



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