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https://issues.apache.org/jira/browse/BOOKKEEPER-35?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067528#comment-13067528
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Flavio Junqueira commented on BOOKKEEPER-35:
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When a client opens a ledger for reading (it is not the writer of the ledger),
if it can't find a "closed" znode on ZooKeeper for that ledger, then it
executes a recovery procedure to close the ledger. I believe this is the
feature you're looking for, yes?
> 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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