I recently enabled reverse DNS on my test cluster. Now when I run a MR
job, the HBase input split locations are all adding a period to the end.
Yet the machine locations are still correct:
Since those strings don't match, it isn't assigning the tasks locally. It
actually thinks 100% of the map tasks are rack-local and 0% data-local
(although in reality, some still wind up being data-local due to sheer
What is the issue here? Note that I don't have this problem with the MR
tasks using SequenceFile as input, only with HBase's TableMapper.