[ https://issues.apache.org/jira/browse/HDFS-2492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Loughran updated HDFS-2492: --------------------------------- Status: Patch Available (was: Open) resubmit > BlockManager cross-rack replication checks only work for ScriptBasedMapping > --------------------------------------------------------------------------- > > Key: HDFS-2492 > URL: https://issues.apache.org/jira/browse/HDFS-2492 > Project: Hadoop HDFS > Issue Type: Bug > Affects Versions: 0.23.0, 0.24.0 > Reporter: Steve Loughran > Assignee: Steve Loughran > Priority: Minor > Attachments: HDFS-2492-blockmanager.patch, > HDFS-2492-blockmanager.patch, HDFS-2492-blockmanager.patch, > HDFS-2492-blockmanager.patch > > > The BlockManager cross-rack replication checks only works if script files are > used for replication, not if alternate plugins provide the topology > information. > This is because the BlockManager sets its rack checking flag if there is a > filename key > {code} > shouldCheckForEnoughRacks = > conf.get(DFSConfigKeys.NET_TOPOLOGY_SCRIPT_FILE_NAME_KEY) != null; > {code} > yet this filename key is only used if the topology mapper defined by > {code} > DFSConfigKeys.NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY > {code} > is an instance of {{ScriptBasedMapping}} > If any other mapper is used, the system may be multi rack, but the Block > Manager will not be aware of this fact unless the filename key is set to > something non-null -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira