David Mollitor created PARQUET-1778:
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Summary: Do Not Record Class for Avro Generic Record Reader
Key: PARQUET-1778
URL: https://issues.apache.org/jira/browse/PARQUET-1778
Project: Parquet
Issue Type: Improvement
Reporter: David Mollitor
{code:java}
final ParquetReader<GenericRecord> reader =
AvroParquetReader.<GenericRecord>builder(path).build();final
ParquetReader<GenericRecord> reader =
AvroParquetReader.<GenericRecord>builder(path).build(); final GenericRecord
genericRecord = reader.read();
{code}
It fails with...
{code:none}
java.lang.NoSuchMethodException: io.github.belugabehr.app.Record.<init>()
at java.lang.Class.getConstructor0(Class.java:3082) ~[na:1.8.0_232]
at java.lang.Class.getDeclaredConstructor(Class.java:2178)
~[na:1.8.0_232]
at
org.apache.avro.specific.SpecificData$1.computeValue(SpecificData.java:63)
~[avro-1.9.1.jar:1.9.1]
at
org.apache.avro.specific.SpecificData$1.computeValue(SpecificData.java:58)
~[avro-1.9.1.jar:1.9.1]
at java.lang.ClassValue.getFromHashMap(ClassValue.java:227)
~[na:1.8.0_232]
at java.lang.ClassValue.getFromBackup(ClassValue.java:209)
~[na:1.8.0_232]
at java.lang.ClassValue.get(ClassValue.java:115) ~[na:1.8.0_232]
{code}
I was surprised because it should just load a {{GenericRecord}} view of the
data. But alas, I have the Avro Schema defined with the {{namespace}} and
{{name}} fields pointing to {{io.github.belugabehr.app.Record}} which just so
happens to be a real class on the class path, so it is trying to call the
public constructor on the class which does not exist.
There {{GenericRecordReader}} should always ignore this Avro Schema namespace
information.
I am putting {{GenericRecords}} into the Parquet file, I expect to get
{{GenericRecords}} back out when I read it.
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