[HADOOP-8710] Remove ability for users to easily run the trash emptier

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 2.0.0-alpha
• Fix Version/s: 2.0.2-alpha
• Component/s: fs
• Hadoop Flags: Incompatible change, Reviewed
• Release Note: The trash emptier may no longer be run using "hadoop org.apache.hadoop.fs.Trash". The trash emptier runs on the NameNode (if configured). Old trash checkpoints may be deleted using "hadoop fs -expunge".
• Assignee: Eli Collins
• Reporter: Eli Collins
• Created: 17/Aug/12 18:46
• Updated: 11/Oct/12 17:45
• Resolved: 17/Aug/12 23:30

Description

Users can currently run the emptier via hadoop org.apache.hadoop.fs.Trash, which seems error prone as there's nothing in that command that suggests it runs the emptier and nothing that asks you before deleting the trash for all users (that the current user is capable of deleting). Given that the trash emptier runs server side (eg on the NN) let's remove the ability to easily run it client side. Marking as an incompatible change since someone expecting the hadoop command with this class specified to empty trash will no longer be able to (they'll need to create their own class that does this).

Issue Links

• is related to: HADOOP-8689 Make trash a server side configuration option