[ https://issues.apache.org/jira/browse/HDFS-14279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Erik Krogen updated HDFS-14279: ------------------------------- Resolution: Fixed Fix Version/s: 3.3.0 Status: Resolved (was: Patch Available) > [SBN Read] Race condition in ObserverReadProxyProvider > ------------------------------------------------------ > > Key: HDFS-14279 > URL: https://issues.apache.org/jira/browse/HDFS-14279 > Project: Hadoop HDFS > Issue Type: Bug > Components: hdfs, namenode > Reporter: Erik Krogen > Assignee: Erik Krogen > Priority: Major > Fix For: 3.3.0 > > Attachments: HDFS-14279.000.patch, HDFS-14279.001.patch > > > There is a race condition in {{ObserverReadProxyProvider#getCurrentProxy()}}: > {code} > private NNProxyInfo<T> getCurrentProxy() { > if (currentProxy == null) { > changeProxy(null); > } > return currentProxy; > } > {code} > {{currentProxy}} is a {{volatile}}. Another {{changeProxy()}} could occur > after the {{changeProxy()}} and before the {{return}}, thus making the return > value incorrect. I have seen this result in an NPE. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org