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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4645) Edits Log recovery losing data across column families
Date Wed, 26 Oct 2011 18:05:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13136175#comment-13136175

Hudson commented on HBASE-4645:

Integrated in HBase-TRUNK #2370 (See [https://builds.apache.org/job/HBase-TRUNK/2370/])
    HBASE-4645 Edits Log recovery losing data across column families

nspiegelberg : 
Files : 
* /hbase/trunk/CHANGES.txt
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* /hbase/trunk/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALReplay.java

> 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
> 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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