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https://issues.apache.org/jira/browse/AVRO-2618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismaël Mejía reassigned AVRO-2618:
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Assignee: Sébastien Foutrier
> C# DataFileReader requires Stream to be Seekable for no reason
> --------------------------------------------------------------
>
> Key: AVRO-2618
> URL: https://issues.apache.org/jira/browse/AVRO-2618
> Project: Apache Avro
> Issue Type: Bug
> Components: csharp
> Reporter: Sébastien Foutrier
> Assignee: Sébastien Foutrier
> Priority: Major
> Fix For: 1.9.2
>
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> When calling the method DataFileReader.OpenReader on a non-seekable stream,
> the method throws an AvroException.
> The requirements for this Seek() call is:
> # To ensure the magic number to be there and rewind the Stream afterward.
> # To be able to call the methods Seek and Sync.
> The 1. is not useful as the Ctor does ensure again that the magic number is
> there (this is the reason why the Stream has to be rewind). This code can
> just be removed with no side effect, as a Stream without this magic number
> will throw itself an AvroException. (the message being "Not a valid data
> file!" instead of "Not an Avro data file").
> The 2. could be checked at the call time of the method: the user that sends a
> non-seekable Stream should not call Seek or Sync upon the reader. (and by the
> way the Stream should throws a UnsupportedException at this time)
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