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From "Kihwal Lee (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HADOOP-7831) ConcurrentModificationException in getCurrentUser()
Date Wed, 23 Nov 2011 18:35:40 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kihwal Lee resolved HADOOP-7831.
--------------------------------

          Resolution: Duplicate
    Target Version/s: 0.20.205.1, 0.20.206.0  (was: 0.20.206.0, 0.20.205.1)

Duplicate of HADOOP-7854
                
> ConcurrentModificationException in getCurrentUser()
> ---------------------------------------------------
>
>                 Key: HADOOP-7831
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7831
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 0.20.205.0
>            Reporter: Kihwal Lee
>
> I've seen the following exception from a job tracker log. Security/kerberos enabled.
> {noformat}
> 2011-11-17 01:54:00,288 WARN org.apache.hadoop.mapred.CleanupQueue: Error deleting path
> hdfs://namenode:1234/xxxx/xxxx/xxxx/job_xxxxxxxxx_xxxx
> java.util.ConcurrentModificationException
>         at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:761)
>         at java.util.LinkedList$ListItr.next(LinkedList.java:696)
>         at javax.security.auth.Subject$SecureSet$1.next(Subject.java:1014)
>         at javax.security.auth.Subject$ClassSet$1.run(Subject.java:1345)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject$ClassSet.populateSet(Subject.java:1342)
>         at javax.security.auth.Subject$ClassSet.<init>(Subject.java:1317)
>         at javax.security.auth.Subject.getPrivateCredentials(Subject.java:731)
>         at org.apache.hadoop.security.UserGroupInformation.<init>(UserGroupInformation.java:379)
>         at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:398)
>         at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:1445)
>         at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1346)
>         at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:254)
>         at org.apache.hadoop.fs.Path.getFileSystem(Path.java:187)
>         at org.apache.hadoop.mapred.CleanupQueue$PathDeletionContext$1.run(CleanupQueue.java:78)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1064)
>         at org.apache.hadoop.mapred.CleanupQueue$PathDeletionContext.deletePath(CleanupQueue.java:75)
>         at org.apache.hadoop.mapred.CleanupQueue$PathCleanupThread.run(CleanupQueue.java:131)
> {noformat}

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