Todd Lipcon created HADOOP-9150: ----------------------------------- Summary: Unnecessary DNS resolution attempts for logical URIs Key: HADOOP-9150 URL: https://issues.apache.org/jira/browse/HADOOP-9150 Project: Hadoop Common Issue Type: Bug Components: ha Affects Versions: 2.0.2-alpha, 3.0.0 Reporter: Todd Lipcon Priority: Critical
In the FileSystem code, we accidentally try to DNS-resolve the logical name before it is converted to an actual domain name. In some DNS setups, this can cause a big slowdown - eg in one misconfigured cluster we saw a 2-3x drop in terasort throughput, since every task wasted a lot of time waiting for slow "not found" responses from DNS. -- 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