[HADOOP-285] Data nodes cannot re-join the cluster once connection is lost

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.3.0
• Fix Version/s: 0.3.2
• Assignee: Hairong Kuang
• Reporter: Konstantin Shvachko
• Created: 07/Jun/06 15:26
• Updated: 08/Jul/09 16:41
• Resolved: 08/Jun/06 02:29

Description

A data node looses connection to a name node and then tries to offerService() again.
HADOOP-270 changes force it to start dataXceiveServer, which is already started and in this case
throws IllegalThreadStateException, which goes on in a loop, and never reaches the heartbeat section.
So the data node never re-joins the cluster, while from the out side it looks it's still running.
This is another reason why we see missing data, and don't see failed data nodes.