last split generated by FileInputFormat.getSplits may not have the best locality --------------------------------------------------------------------------------
Key: MAPREDUCE-3710 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3710 Project: Hadoop Map/Reduce Issue Type: Bug Components: mrv1, mrv2 Affects Versions: 1.0.0, 0.23.0 Reporter: Siddharth Seth Assignee: Siddharth Seth The last split generated by FileInputFormat.getSplits considers {{blkLocations.length-1}} to be the hosts for the split. The last split may be larger than the rest (SPLIT_SLOP=1.1 by default) - in which case locality is picked up from a smaller block. e.g. 1027MB file with a 128MB split size. The last split ends up being 131MB. The hosts for locality end up being the nodes containing the 3MB block instead of the 128MB block. -- 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