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From "Amitanand Aiyer (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4645) Edits Log recovery losing data across column families
Date Tue, 25 Oct 2011 00:04:32 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amitanand Aiyer updated HBASE-4645:
-----------------------------------

    Status: Patch Available  (was: Open)
    
> Edits Log recovery losing data across column families
> -----------------------------------------------------
>
>                 Key: HBASE-4645
>                 URL: https://issues.apache.org/jira/browse/HBASE-4645
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.89.20100924, 0.92.0
>            Reporter: Amitanand Aiyer
>            Assignee: Amitanand Aiyer
>         Attachments: 4645-v9.diff
>
>
> There is a data loss happening (for some of the column families) when we do the replay
logs.
> The bug seems to be from the fact that during replay-logs we only choose to replay
> the logs from the maximumSequenceID across *ALL* the stores. This is wrong. If a
> column family is ahead of others (because the crash happened before all the column
> families were flushed), then we lose data for the column families that have not yet
> caught up.
> The correct logic for replay should begin the replay from the minimum across the
> maximum in each store. 

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