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Devaraj Das commented on MAPREDUCE-1288: ---------------------------------------- This issue is talking about how localization happens in 0.21/trunk. There is no "public" or "private" cache files currently. That is getting introduced In MAPREDUCE-744, > DistributedCache localizes only once per cache URI > -------------------------------------------------- > > Key: MAPREDUCE-1288 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1288 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: security, tasktracker > Affects Versions: 0.21.0 > Reporter: Devaraj Das > Priority: Blocker > Fix For: 0.21.0 > > > As part of the file localization the distributed cache localizer creates a > copy of the file in the corresponding user's private directory. The > localization in DistributedCache assumes the key as the URI of the cachefile > and if it already exists in the map, the localization is not done again. This > means that another user cannot access the same distributed cache file. We > should change the key to include the username so that localization is done > for every user. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.