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From Aljoscha Krettek <aljos...@apache.org>
Subject Re: Stringable Hashmap keys on POJOs
Date Thu, 04 Dec 2014 20:41:42 GMT
I don't know any workaround. But maybe Avro should be avoided
altogether for your requirements.

What is the data that you want to move between operations?

On Thu, Dec 4, 2014 at 7:13 PM, Paris Carbone <parisc@kth.se> wrote:
> Hello,
> It seems that Avro fails to serialise POJOs that contain non-String or stringable keys<https://apache.googlesource.com/avro/+/40650540dcb8ca8a6b6235de5cdd36c0f6e2eb31/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java#361>.
> eg. in the example here<https://github.com/senorcarbone/incubator-flink/blob/72b6798b50396c962fc6cea20a2bcdd51eec06f4/flink-examples/flink-java-examples/src/main/java/org/apache/flink/examples/java/testing/LongMapKeyIssueExample.java>
I get a compiler exception caused by:
> org.apache.avro.AvroTypeException: Map key class not String: class java.lang.Long
> Is there any known workaround/recommendation for this except for using String keys?
> I need this for a use case of low latency data-intensive streaming so String conversions
should be avoided.
> Paris

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