How about leveraging filesystem permissions so the user has access to both dir?
On Feb 9, 2013, at 1:54 AM, "wang" <[email protected]> wrote: > Hi, > > In security mode, Is it possible in one mr job visit two user's data in > hdfs? Means: there are two maps in one job, one map read user1's data, > another read user2's data. As I know, before submit job, jobclient get the > delegation token for MR task, but in class credentials, the tokenmap can > only take one token for one type of service. If I get user2's token, and add > to credentials, the user1's token will be overwrite. > > Anyone met the same situation or someone can give some suggestions? The > background is in hive, one sql maybe visit different user's data. Tks. > > > > Regards > > wwli >
