ConcurrentModificationException in getCurrentUser()
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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.
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)
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