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https://issues.apache.org/jira/browse/FLINK-944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14035987#comment-14035987 ]
ASF GitHub Bot commented on FLINK-944:
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Github user StephanEwen commented on the pull request:
https://github.com/apache/incubator-flink/pull/25#issuecomment-46466239
Looks good, will merge...
> Serialization problem of CollectionInputFormat
> ----------------------------------------------
>
> Key: FLINK-944
> URL:
https://issues.apache.org/jira/browse/FLINK-944> Project: Flink
> Issue Type: Bug
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
>
> The CollectionInputFormat uses only the standard serialization means provided by the JVM. Thus data types which are serializable with a TypeSerializer but does not implement the Serializable interface cannot be used with a CollectionDataSource. Even worse, if one uses an aggregation type such as a tuple, only the top level object will be checked for serializability. Consequently, it will crash at runtime.
> It would be more user friendly to not enforce that a used data type has to implement the Serializable interface. Instead we should use the generated TypeSerializer to do the serialization. That way, we are more flexible.
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