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Date: Fri, 12 Aug 2016 16:54:20 +0000 (UTC)
From: "Xiao Chen (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.12996717.1470940394000.293815.1471020860947@Atlassian.JIRA>
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References: <JIRA.12996717.1470940394000@Atlassian.JIRA> <JIRA.12996717.1470940394640@arcas>
Subject: [jira] [Commented] (HADOOP-13487) Hadoop KMS doesn't clean up old
 delegation tokens stored in Zookeeper
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archived-at: Fri, 12 Aug 2016 16:54:22 -0000


    [ https://issues.apache.org/jira/browse/HADOOP-13487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15419113#comment-15419113 ] 

Xiao Chen commented on HADOOP-13487:
------------------------------------

Oops, sorry Alex, I meant [~axenol].. :)

> Hadoop KMS doesn't clean up old delegation tokens stored in Zookeeper
> ---------------------------------------------------------------------
>
>                 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
>
> 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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