Colin Patrick McCabe created HDFS-4870:
------------------------------------------
Summary: periodically re-resolve hostnames in included and
excluded datanodes list
Key: HDFS-4870
URL: https://issues.apache.org/jira/browse/HDFS-4870
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Colin Patrick McCabe
Priority: Minor
We currently only resolve the hostnames in the included and excluded datanodes
list once-- when the list is read. The rationale for this is that in big
clusters, DNS resolution for thousands of nodes can take a long time (when
generating a datanode list in getDatanodeListForReport, for example). However,
if the DNS information changes for one of these hosts, we should reflect that.
A background thread could do these DNS resolutions every few minutes without
blocking any foreground operations.
--
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
