[jira] [Updated] (AVRO-1200) DatumWriter can write malformed data if collection is modified during write

["Tom White (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AVRO-1200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tom White updated AVRO-1200:
----------------------------

    Attachment: AVRO-1200.patch

Here's a patch that changes the write methods to throw ConcurrentModificationException if the expected and actual sizes don't match.
                
> DatumWriter can write malformed data if collection is modified during write
> ---------------------------------------------------------------------------
>
>                 Key: AVRO-1200
>                 URL: https://issues.apache.org/jira/browse/AVRO-1200
>             Project: Avro
>          Issue Type: Bug
>          Components: java
>    Affects Versions: 1.7.2
>            Reporter: Tom White
>            Assignee: Tom White
>             Fix For: 1.7.3
>
>         Attachments: AVRO-1200.patch
>
>
> GenericDatumWriter's writeArray and writeMap methods write the size of the collection/map before writing the entries, so it's possible that the sizes will not match, which can cause data corruption and read failures like AVRO-1198.

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