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From "Balu Vellanki (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FALCON-2104) Loss of data in GraphDB when upgrading Falcon from 0.9 to 0.10.
Date Sat, 30 Jul 2016 16:27:20 GMT

    [ https://issues.apache.org/jira/browse/FALCON-2104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15400731#comment-15400731

Balu Vellanki commented on FALCON-2104:

[~sriksun] and [~venkatnrangan] : I could not find the planned migration tool post 0.5.1,
hence wrote the tool.  I am testing the tool right now. The tool depends on non-falcon jars
and does not require Falcon to be up and running. Should we package it with Falcon ? If yes,
we need to cut RC2. If this tool can be distributed separately as part of upgrade instructions,
we can continue to use RC1. 

I propose distributing this separately, as it is only necessary for upgrade and it not using
any Falcon specific code. Please let me know your thoughts. 

> Loss of data in GraphDB when upgrading Falcon from 0.9 to 0.10. 
> ----------------------------------------------------------------
>                 Key: FALCON-2104
>                 URL: https://issues.apache.org/jira/browse/FALCON-2104
>             Project: Falcon
>          Issue Type: Bug
>    Affects Versions: 0.10
>            Reporter: Balu Vellanki
>            Assignee: Balu Vellanki
>            Priority: Critical
>             Fix For: trunk, 0.10
>   Original Estimate: 48h
>  Remaining Estimate: 48h
> FALCON-1333 (Instance Search feature) requires Falcon to use titan-berkeleyje version
0.5.4 to support indexing. Up until version 0.9 - Falcon used   titan-berkeleyje-jre6 version
0.4.2.  GraphDB created by version 0.4.2 cannot be read by version 0.5.4. When attempting
an upgrade, I realized that entity and instance lineage data created in 0.9 version could
not be read by Falcon in 0.10 version. 
> The only solution seems to provide a tool to do the following
> - Use 0.4.2 version of titan-berkeleyje-jre6 to read the berkeleyDB based graphDB and
create a JSON file with all data.
> - shutdown falcon-0.9, upgrade Falcon.
> - use 0.5.4 version of titan-berkeleyje to read JSON file and repopulate berkeleyDB based
> - restart falcon-0.10
> I will work on the tool, and update release-notes, upgrade instructions accordingly.

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