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From Stefán Baxter (JIRA) <j...@apache.org>
Subject [jira] [Comment Edited] (DRILL-4056) Avro deserialization corrupts data
Date Tue, 10 Nov 2015 20:15:11 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14999231#comment-14999231
] 

Stefán Baxter edited comment on DRILL-4056 at 11/10/15 8:14 PM:
----------------------------------------------------------------

This is a demo file.

The bug can be triggered by selecting:
select s.classification.type from dfs.asa.`/<filename>` as s;

lines 41 and 42 are wrong "musikr" it should be "musik" but it seems to get the extra r from
the preavious entry "teater". 

The sample can be a bit misleading as it contains music in two languages, musik and musikk,
so please don't let that "extra" k not throw you off track.




was (Author: acmeguy):
This is a demo file.

The bug can be triggered by selecting:
select s.classification.type from dfs.asa.`/<filename>` as s;

line 41 and 42 are wrong "musikr" it should be "musik" but it seems to get the extra r from
the preavious entry "teater". 

The sample can be a bit misleading as it contains music in two languages, musik and musikk,
so please don't let that "extra" k not throw you off track.



> 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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