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https://issues.apache.org/jira/browse/BOOKKEEPER-35?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dhruba borthakur resolved BOOKKEEPER-35.
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    Resolution: Not A Problem

This API already exists.

> 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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