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https://issues.apache.org/jira/browse/DRILL-4056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15004963#comment-15004963
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Jason Altekruse commented on DRILL-4056:
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As I mentioned on the thread about this issue, I believe I have found a fix.
There are a lot of new things in master that are the start of the 1.4 release.
For now I am working on top of 1.3. Please build this branch to try out the
fix. I will be adding unit tests before opening a PR.
https://github.com/jaltekruse/incubator-drill/commits/4056-avro-corruption-bug
> Avro deserialization corrupts data
> ----------------------------------
>
> Key: DRILL-4056
> URL: https://issues.apache.org/jira/browse/DRILL-4056
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Other
> Affects Versions: 1.3.0
> Environment: Ubuntu 15.04 - Oracle Java
> Reporter: Stefán Baxter
> Fix For: 1.3.0
>
> Attachments: test.zip
>
>
> I have an Avro file that support the following data/schema:
> {"field":"some", "classification":{"variant":"Gæst"}}
> When I select 10 rows from this file I get:
> +---------------------+
> | EXPR$0 |
> +---------------------+
> | Gæst |
> | Voksen |
> | Voksen |
> | Invitation KIF KBH |
> | Invitation KIF KBH |
> | Ordinarie pris KBH |
> | Ordinarie pris KBH |
> | Biljetter 200 krBH |
> | Biljetter 200 krBH |
> | Biljetter 200 krBH |
> +---------------------+
> The bug is that the field values are incorrectly de-serialized and the value
> from the previous row is retained if the subsequent row is shorter.
> The sql query:
> "select s.classification.variant variant from dfs.<some> as s limit 10;"
> That way the "Ordinarie pris" becomes "Ordinarie pris KBH" because the
> previous row had the value "Invitation KIF KBH".
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