[jira] [Updated] (NIFI-5316) Potential bug with Fetch Parquet

["Bryan Bende (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-5316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bryan Bende updated NIFI-5316:
------------------------------
    Assignee: Bryan Bende
      Status: Patch Available  (was: Open)

> 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
>
> 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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