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https://issues.apache.org/jira/browse/BOOKKEEPER-243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13271104#comment-13271104
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Sijie Guo commented on BOOKKEEPER-243:
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@Rakesh, that is my point. In bookie server, we had sanity check using
#isSpecialNode.
but from bookie server side, it just has the knowledge about its znode created
itself, no knowledge about other znodes. one possible solution is that we
change how to check, just check whether the znode's name is a ledger id or not.
> BK JM : After restart bookkeeper continuously throwing error because BK JM
> create all Namenode related znode under '/ledgers' znode.
> ------------------------------------------------------------------------------------------------------------------------------------
>
> Key: BOOKKEEPER-243
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-243
> Project: Bookkeeper
> Issue Type: Improvement
> Components: bookkeeper-server
> Reporter: surendra singh lilhore
>
> Issue :
> Bookkeeper journal manager create all the Namenode related znode under
> '/ledgers' znode in zookeeper. When bookkeeper read all the ledgers from
> '/ledgers' znode it consider this znode (version, lock, maxtxid) as
> incorrect format ledger and log following error.
> {noformat}
> 2012-04-20 11:52:25,611 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: ledgers
> 2012-04-20 11:52:25,611 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: lock
> 2012-04-20 11:52:25,612 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: maxtxid
> 2012-04-20 11:52:26,613 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: version
> 2012-04-20 11:52:26,613 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: ledgers
> 2012-04-20 11:52:26,613 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: lock
> 2012-04-20 11:52:26,613 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: maxtxid
> 2012-04-20 11:52:27,614 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: version
> 2012-04-20 11:52:27,614 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: ledgers
> 2012-04-20 11:52:27,614 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: lock
> 2012-04-20 11:52:27,615 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: maxtxid
> 2012-04-20 11:52:28,616 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: version
> 2012-04-20 11:52:28,616 - WARN
> [main-EventThread:AbstractZkLedgerManager$2@123] - Error extracting ledgerId
> from ZK ledger node: ledgers
> {noformat}
> I think Namenode related znode should be create in separate znode in
> zookeeper.
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