[ https://issues.apache.org/jira/browse/HDFS-4532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13590656#comment-13590656 ]
Kihwal Lee commented on HDFS-4532: ---------------------------------- The patch itself looks good, but there is one thing I am not sure about in the existing code. Do isExternalInvocation() and FSNamesystem.getRemoteIp() work correctly when Hftp is used? > RPC call queue may fill due to current user lookup > -------------------------------------------------- > > Key: HDFS-4532 > URL: https://issues.apache.org/jira/browse/HDFS-4532 > Project: Hadoop HDFS > Issue Type: Bug > Components: namenode > Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0 > Reporter: Daryn Sharp > Assignee: Daryn Sharp > Priority: Critical > Attachments: HDFS-4532.branch-23.patch, HDFS-4532.patch > > > Audit logging need to invoke {{UGI.getCurrentUser}} to log the user > performing an operation. This is a synch'ed method, so audit logging is > effectively serializing the completion of concurrent read ops. Under very > heavy load, RPC throughput drops dramatically, the call queue fills with > thousands of waiting operations, and clients begin timing out. Jstack shows > all but one call handler blocked on {{UGI.getCurrentUser}}. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira