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https://issues.apache.org/jira/browse/AVRO-1529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14716250#comment-14716250
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Manuel Godbert commented on AVRO-1529:
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Not really, we just managed to avoid creating empty avro files
> ConcatTool issue with empty files
> ---------------------------------
>
> Key: AVRO-1529
> URL: https://issues.apache.org/jira/browse/AVRO-1529
> Project: Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.7.6
> Reporter: Manuel Godbert
>
> I am using the ConcatTool to merge 2 avro files. The first one is empty, the
> second one has records. The merged file is seen as empty when I am opening it.
> My investigations showed the cause is that DataFileWriter.appendAllFrom(...)
> copies blocks from source to target even if they are empty, and
> DataFileReader.hasNext() returns false if the first block of an avro file is
> empty.
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