NNBench creates duplicate files if multiple maps are run from the same client -----------------------------------------------------------------------------
Key: HDFS-2635 URL: https://issues.apache.org/jira/browse/HDFS-2635 Project: Hadoop HDFS Issue Type: Bug Components: test Affects Versions: 0.20.205.0, 0.20.204.0, 0.20.203.0 Reporter: cp...@kence.org Priority: Minor NNBench creates files in the format: file_<hostname>__<filenum> This works seamlessly as long as all of the Hadoop clients in the cluster are each running with a single map slot. If multiple map slots are available on a single client, each mapper tries to create the same set of files. This can result in lock contention on some non-Hadoop HDFS implementations thereby defeating the purpose of the NNBench test. Making the files unique per mapper, not per host, resolves this. -- 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