Junping Du created HADOOP-8372: ---------------------------------- Summary: normalizeHostName() in NetUtils is not working properly in resolving a hostname start with numeric character Key: HADOOP-8372 URL: https://issues.apache.org/jira/browse/HADOOP-8372 Project: Hadoop Common Issue Type: Bug Components: io, util Affects Versions: 0.23.0, 1.0.0 Reporter: Junping Du Assignee: Junping Du
A valid host name can start with numeric value (You can refer RFC952, RFC1123 or http://www.zytrax.com/books/dns/apa/names.html), so it is possible in a production environment, user name their hadoop nodes as: 1hosta, 2hostb, etc. But normalizeHostName() will recognise this hostname as IP address and return directly rather than resolving the real IP address. These nodes will be failed to get correct network topology if topology script/TableMapping only contains their IPs (without hostname). -- 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