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https://issues.apache.org/jira/browse/NIFI-5316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16540981#comment-16540981
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ASF subversion and git services commented on NIFI-5316:
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Commit 260bc29e1014a2fd21c3775e27f434756e13e0ee in nifi's branch
refs/heads/support/nifi-1.7.x from [~bbende]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=260bc29 ]
NIFI-5316 Fixed array handling for Avro that comes from Parquet's Avro reader
Signed-off-by: zenfenan <[email protected]>
> Potential bug with Fetch Parquet
> --------------------------------
>
> Key: NIFI-5316
> URL: https://issues.apache.org/jira/browse/NIFI-5316
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.6.0
> Reporter: Robert Bruno
> Assignee: Bryan Bende
> Priority: Major
> Fix For: 1.8.0, 1.7.1
>
>
> I have used PutParquet to create Parquet files from Nifi Records. In trying
> to convert the parquet back to json by using FetchParquet, I keep getting
> errors on what seems like any array field. I have had successes on data that
> contained no arrays.
> The error in the log is cannont convert a value [xxx, yyy] where xxx and yyy
> are random strings of type class java.util.ArrayList because no compatible
> type exist in the UNION of field z.
> I am also see the same error when the value is [] (empty array) as well.
> I have been successful gong from json to avro and avro to json with the same
> schema registry values.
> I am defining array fields as follows:
> "type" : [
> "null",
> {
> "type" : "array",
> "items" : "string"
> }
> ],
> "default": null
> }
>
>
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