[HADOOP-3070] Trash not being expunged, Trash Emptier thread gone by NPE

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.16.0, 0.16.1
• Fix Version/s: 0.16.2
• Component/s: fs
• Assignee: Koji Noguchi
• Reporter: Koji Noguchi
• Created: 21/Mar/08 22:28
• Updated: 03/Apr/08 15:42
• Resolved: 26/Mar/08 22:18

Description

We noticed that the users' trash were not being expunged by the namenode.

jstack didn't show the Trash.Emptier thread and .out file showed

Exception in thread "Trash Emptier" java.lang.NullPointerException
at org.apache.hadoop.fs.Trash.expunge(Trash.java:146)
at org.apache.hadoop.fs.Trash$Emptier.run(Trash.java:233)
at java.lang.Thread.run(Thread.java:619)

It seems like this happens when it hits the user's directory which doesn't contain the .Trash.