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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-3464) BKJM: Deleting currentLedger and leaving 'inprogress_x' on exceptions can throw BKNoSuchLedgerExistsException later.
Date Mon, 25 Jun 2012 16:10:44 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Uma Maheswara Rao G resolved HDFS-3464.
---------------------------------------

    Resolution: Fixed
    
> BKJM: Deleting currentLedger and leaving 'inprogress_x'  on exceptions can throw BKNoSuchLedgerExistsException
later.
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-3464
>                 URL: https://issues.apache.org/jira/browse/HDFS-3464
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: 2.0.1-alpha, 3.0.0
>            Reporter: Uma Maheswara Rao G
>            Assignee: Uma Maheswara Rao G
>
> HDFS-3058 will clean currentLedgers on exception.
> In BookKeeperJournalManager, startLogSegment() is deleting the corresponding 'inprogress_ledger'
ledger on exception. Here leaving the 'inprogress_x' ledger metadata in ZooKeeper. When the
other node becomes active, he will see the 'inprogress_x' znode and tries to recoverLastTxId()
it would throw exception, since there is no 'inprogress_ledger' exists. 
> {noformat}
> Caused by: org.apache.bookkeeper.client.BKException$BKNoSuchLedgerExistsException
> 	at org.apache.bookkeeper.client.BookKeeper.openLedger(BookKeeper.java:393)
> 	at org.apache.hadoop.contrib.bkjournal.BookKeeperJournalManager.recoverLastTxId(BookKeeperJournalManager.java:493)
> {noformat}
> As per the discussion in HDFS-3058, we will handle the coment as part of this JIRA.

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