[jira] [Assigned] (FALCON-2104) Loss of data in GraphDB when upgrading Falcon from 0.9 to 0.10.

["Balu Vellanki (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FALCON-2104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Balu Vellanki reassigned FALCON-2104:
-------------------------------------

    Assignee: Balu Vellanki  (was: Venkat Ranganathan)

> 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
>
>         Attachments: FALCON-2104.patch-v0.10, FALCON-2104.patch-v0.9
>
>   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 graphDB.
> - restart falcon-0.10
> I will work on the tool, and update release-notes, upgrade instructions accordingly. 



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