[jira] [Updated] (AVRO-1142) Specification is misleading in regards to CRC32 checksum of Snappy blocks

["Doug Cutting (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AVRO-1142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Doug Cutting updated AVRO-1142:
-------------------------------

    Attachment: AVRO-1142.patch

Here's a patch that improves this.

If there are no objections I'll commit this soon.
                
> Specification is misleading in regards to CRC32 checksum of Snappy blocks
> -------------------------------------------------------------------------
>
>                 Key: AVRO-1142
>                 URL: https://issues.apache.org/jira/browse/AVRO-1142
>             Project: Avro
>          Issue Type: Bug
>          Components: spec
>            Reporter: Martin Nagy
>         Attachments: AVRO-1142.patch
>
>
> The specification says:
> ??Each compressed block is followed by its 4-byte, big-endian CRC32 checksum.??
> This, in my opinion, suggests that the CRC32 checksum is calculated from the compressed block, when in fact it is computed from the block before compression (as it is implemented in java). I've implemented a snappy codec for C++ and had trouble with this :(

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