FLUME-2265. Closed bucket writers should be removed from sfwriters map
Review Request #16416 - Created Dec. 20, 2013 and updated
On idle or roll time based close, the bucket writer is closed and the bucket writer is removed from sfWriters map. The patch introduces a new exception, which is thrown when an append tries to write to a bucket writer that is closed based on time (roll or idle). The sink then catches this exception, creates a new bucket writer and writes to that one.