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https://issues.apache.org/jira/browse/HADOOP-9747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16126644#comment-16126644
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Eric Payne commented on HADOOP-9747:
------------------------------------
[~daryn], the following tests are failing with this patch and succeeding
without it on trunk:
{noformat}
TestTokenClientRMService#testTokenRenewalByLoginUser
testTokenRenewalByLoginUser(org.apache.hadoop.yarn.server.resourcemanager.TestTokenClientRMService)
Time elapsed: 0.043 sec <<< ERROR!
java.lang.reflect.UndeclaredThrowableException: null
at
org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.renewDelegationToken(ClientRMService.java:1058)
at
org.apache.hadoop.yarn.server.resourcemanager.TestTokenClientRMService.checkTokenRenewal(TestTokenClientRMService.java:169)
at
org.apache.hadoop.yarn.server.resourcemanager.TestTokenClientRMService.access$500(TestTokenClientRMService.java:46)
TestRMDelegationTokens#testRMDTMasterKeyStateOnRollingMasterKey
testRMDTMasterKeyStateOnRollingMasterKey(org.apache.hadoop.yarn.server.resourcemanager.security.TestRMDelegationTokens)
Time elapsed: 0.792 sec <<< ERROR!
org.apache.hadoop.yarn.exceptions.YarnException: java.io.IOException:
Delegation Token can be issued only with kerberos authentication
at
org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getDelegationToken(ClientRMService.java:1022)
at
org.apache.hadoop.yarn.server.resourcemanager.security.TestRMDelegationTokens.testRMDTMasterKeyStateOnRollingMasterKey(TestRMDelegationTokens.java:102)
{noformat}
> Reduce unnecessary UGI synchronization
> --------------------------------------
>
> Key: HADOOP-9747
> URL: https://issues.apache.org/jira/browse/HADOOP-9747
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0-alpha1
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
> Attachments: HADOOP-9747.2.branch-2.patch, HADOOP-9747.2.trunk.patch,
> HADOOP-9747.branch-2.patch, HADOOP-9747.trunk.patch
>
>
> Jstacks of heavily loaded NNs show up to dozens of threads blocking in the
> UGI.
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