[ https://issues.apache.org/jira/browse/HDFS-513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jakob Homan reassigned HDFS-513: -------------------------------- Assignee: Todd Lipcon > NameNode.getBlockLocations throws NPE when offset > filesize and file is not > empty > ---------------------------------------------------------------------------------- > > Key: HDFS-513 > URL: https://issues.apache.org/jira/browse/HDFS-513 > Project: Hadoop HDFS > Issue Type: Bug > Components: name-node > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Attachments: hdfs-513-trunk.txt, hdfs-513.txt > > > in BlockManager.getBlockLocations, if the offset is past the end of a > non-empty file, it returns null. In FSNamesystem.getBlockLocationsInternal, > this null is passed through to inode.createLocatedBlocks, so it ends up with > a LocatedBlocks instance whose .blocks is null. This is then iterated over in > FSNamesystem.getBlockLocations, and throws an NPE. > Instead, I think BlockManager.getBlockLocations should return > Collections.emptyList in the past-EOF case. This would result in an empty > list response from NN.getBlockLocations which matches the behavior of an > empty file. If this sounds like the appropriate fix I"ll attach the patch. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.