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From "Dave Beech (JIRA)" <>
Subject [jira] [Updated] (CRUNCH-147) Pipeline.writeTextFile should work with Avro data
Date Tue, 22 Jan 2013 14:26:13 GMT


Dave Beech updated CRUNCH-147:

    Attachment: CRUNCH-147.patch

It looks like this can be made to work by removing the call that
wraps the collection's type (see patch). 

I haven't run any integration testing and I would expect there to have been a good reason
to have this call in the first place, so please feel free to tell me this is a bad idea! 
> Pipeline.writeTextFile should work with Avro data
> -------------------------------------------------
>                 Key: CRUNCH-147
>                 URL:
>             Project: Crunch
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.4.0
>            Reporter: Dave Beech
>            Assignee: Josh Wills
>            Priority: Minor
>         Attachments: CRUNCH-147.patch
> I'd find it useful to be able to dump Avro collections to a text file (as json) during
development to have a quick look inside without having to mess around with avro-tools. The
current Pipeline.writeTextFile method expects Writables and gives the following error when
you attempt to pass Avro to it:
> Exception in thread "main" java.lang.ClassCastException: class my.avro.Record
> 	at java.lang.Class.asSubclass(
> 	at org.apache.crunch.types.writable.Writables.records(
> 	at org.apache.crunch.types.writable.WritableTypeFamily.records(
> 	at org.apache.crunch.types.PTypeUtils.convert(
> 	at

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