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Date: Fri, 7 Dec 2012 23:57:22 +0000 (UTC)
From: "Karthik Kambatla (JIRA)" <jira@apache.org>
To: mapreduce-dev@hadoop.apache.org
Message-ID: <JIRA.12622991.1354924636627.6262.1354924642460@arcas>
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Subject: [jira] [Created] (MAPREDUCE-4862) Inconsistent synchronization in
 yarn.server.rm.security.DelegationTokenRenewal
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Karthik Kambatla created MAPREDUCE-4862:
-------------------------------------------

             Summary: Inconsistent synchronization in yarn.server.rm.security.DelegationTokenRenewal
                 Key: MAPREDUCE-4862
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4862
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: security
    Affects Versions: 1.1.1
            Reporter: Karthik Kambatla
            Assignee: Karthik Kambatla


mapreduce.security.token.DelegationTokenRenewal synchronizes on removeDelegationToken, but fails to synchronize on addToken, and renewing tokens in run().

This inconsistency is exposed by frequent failures of TestDelegationTokenRenewal:
{noformat}
Error Message

renew wasn't called as many times as expected expected:<4> but was:<5>
Stacktrace

junit.framework.AssertionFailedError: renew wasn't called as many times as expected expected:<4> but was:<5>
	at org.apache.hadoop.mapreduce.security.token.TestDelegationTokenRenewal.testDTRenewal(TestDelegationTokenRenewal.java:317)
	at org.apache.hadoop.mapreduce.security.token.TestDelegationTokenRenewal.testDTRenewalAfterClose(TestDelegationTokenRenewal.java:338)

{noformat}


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