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Jeff Storck commented on HADOOP-9747: ------------------------------------- [~djp] [~daryn] I've tested this patch against an HDP 2.6 cluster using the code I've linked on HADOOP-14699, and the results are promising. I'll be doing some more testing today to verify that the patch also resolves an issue with a single UGI that gets into a hung state where the principal has been "forgotten" and falls back to the login user, for which no ticket has been (or can be, in the tested configuration) be acquired. > 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. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org