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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KYLIN-3461) "metastore.sh refresh-cube-signature" not updating cube signature as expected
Date Wed, 01 Aug 2018 10:59:00 GMT

    [ https://issues.apache.org/jira/browse/KYLIN-3461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16565128#comment-16565128
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ASF GitHub Bot commented on KYLIN-3461:
---------------------------------------

asfgit commented on issue #183: KYLIN-3461 metastore.sh refresh-cube-signature not updating
cube sign…
URL: https://github.com/apache/kylin/pull/183#issuecomment-409536463
 
 
   Can one of the admins verify this patch?

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> "metastore.sh refresh-cube-signature" not updating cube signature as expected 
> ------------------------------------------------------------------------------
>
>                 Key: KYLIN-3461
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3461
>             Project: Kylin
>          Issue Type: Bug
>          Components: Client - CLI
>    Affects Versions: v2.3.2
>            Reporter: Yuan Weizhao
>            Priority: Critical
>         Attachments: build-cube-log.png, log-2-calculate-signature-when-refresh-cube-signature.log,
log1-calculate-signature-when-building.log, refresh-cube-signature-log.png
>
>
> Recently I upgraded kylin from 2.3.1 to 2.3.2, and when I tried to build a cube, the
Web UI told me that my cube signature is inconsistent, and suggested that I use the metastore.sh
script to refresh all cube signatures. 
>  I did what I was told to, but as I can read from the log, the script didn't update any
cube signature, and I still received the same error message when I retried to build the cube.
>  I did some digging on the source code, and add some logging statements, re-packaged
kylin and deployed the more-logging version. I found that when kylin refreshes cube signatures
and build new cube segments, it always check whether the cube signature equals to the calculated
signature which is calculated by method org.apache.kylin.cube.model.CubeDesc#calculateSignature().
> And as I observed from the log, this method return DIFFERENT RESULT under the above two
occasions!
> The Difference lies in that when building cube segments invokes calculateSignature(),
it will add "encoding_version" into the "rowkey" json string.



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