Locality scheduling broken due to mismatch between IPs and hosts
----------------------------------------------------------------
Key: MAPREDUCE-3234
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3234
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Affects Versions: 0.23.0
Reporter: Todd Lipcon
Priority: Blocker
I noticed that, on a single-rack cluster, I wasn't getting hardly any data
locality. The issue appears to be the code in RMContainerAllocator which
changes the resource requests to use IP addresses instead of hostnames:
{code}
//host comes from data splitLocations which are hostnames. Containers
// use IP addresses.
//TODO Temporary fix for locality. Use resolvers from h-common.
// Cache to make this more efficient ?
{code}
However, at least on my cluster, the resource manager sees node resources as
hostnames, not IPs. Removing this code fixed data locality.
--
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
