Ability to force close a ledger
-------------------------------

                 Key: BOOKKEEPER-35
                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-35
             Project: Bookkeeper
          Issue Type: Improvement
          Components: bookkeeper-client, bookkeeper-server
            Reporter: dhruba borthakur


We need the ability to make a bookkeeper client force-close a ledger that has 
been opened (and being written to) by another client. Is that currenly possible?

When a  HDFS namenode failover occurs, the standby namenode would like to 
ensure that the primary namenode cannot write to the transaction log any more. 
The standby namenode would first invoke this new bookkeeper API before making 
himself the primary.

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