[ https://issues.apache.org/jira/browse/HADOOP-9749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karthik Kambatla updated HADOOP-9749: ------------------------------------- Target Version/s: 2.6.0 (was: 3.0.0, 2.5.0) > Remove synchronization for UGI.getCurrentUser > --------------------------------------------- > > Key: HADOOP-9749 > URL: https://issues.apache.org/jira/browse/HADOOP-9749 > Project: Hadoop Common > Issue Type: Sub-task > Components: security > Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0 > Reporter: Daryn Sharp > Assignee: Daryn Sharp > Priority: Critical > > HADOOP-7854 added synchronization to {{getCurrentUser}} due to > {{ConcurrentModificationExceptions}}. This degrades NN call handler > performance. > The problem was not well understood at the time, but it's caused by a > collision between relogin and {{getCurrentUser}} due to a bug in > {{Krb5LoginModule}}. Avoiding the collision will allow removal of the > synchronization. -- This message was sent by Atlassian JIRA (v6.2#6252)