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From "Aaron McCurry (JIRA)" <>
Subject [jira] [Updated] (BLUR-105) Index Import rollback
Date Wed, 25 Sep 2013 20:46:03 GMT


Aaron McCurry updated BLUR-105:

    Component/s: Blur
> Index Import rollback
> ---------------------
>                 Key: BLUR-105
>                 URL:
>             Project: Apache Blur
>          Issue Type: Improvement
>          Components: Blur
>    Affects Versions: 0.2.0, 0.3.0
>            Reporter: Aaron McCurry
>            Priority: Blocker
>             Fix For: 0.3.0
> During the index import (after a map reduce job) if there is an exception thrown or a
server shutdown the imported (and committed data from the MapReduce job) could be lost.  This
is because instead of copying the segments from the import directories into the main index.
 The index importer merely renames them and the reason for this is to improve performance.
> I suggest that we create a import logger to log what files have moved where so that in
the event that the import fails, the files that have been moved into the main index and can
be saved.  I may need to create a diagram to illustrate the potential problem.

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