streaming.jar -file packaging forgets timestamps ------------------------------------------------
Key: MAPREDUCE-3584 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3584 Project: Hadoop Map/Reduce Issue Type: Bug Affects Versions: 0.20.2 Reporter: Dieter Plaetinck When invoking "hadoop jar /usr/local/hadoop/contrib/streaming/hadoop-0.20.2-streaming.jar -file <files>", hadoop will package the files <files>, but it will forget about their timestamps. After the files are unpacked in <tmp_dir>/mapred/local/taskTracker/jobcache/job_$job/jars, all files will have the timestamps of when the files were unpacked. The problem is that this way meaningful information is lost. For example in my case i ship some files along with my job, and I need to compare the age (mtime) of 2 files and rebuild one of them if it's too old, but because of this hadoop behavior, my logic breaks. -- 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