[BOOKKEEPER-243] BK JM : After restart bookkeeper continuously throwing error because BK JM create all Namenode related znode under '/ledgers' znode.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Do
• Component/s: bookkeeper-server
• Assignee: Unassigned
• Reporter: Surendra Singh Lilhore
• Created: 08/May/12 06:10
• Updated: 09/Oct/17 09:51
• Resolved: 09/Oct/17 09:51

Description

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.

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

I think Namenode related znode should be create in separate znode in zookeeper.

Issue Links

• is part of: HDFS-3058 HA: Bring BookKeeperJournalManager up to date with HA changes