Robert Bruno created NIFI-5316:
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Summary: 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
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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