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https://issues.apache.org/jira/browse/PARQUET-2051?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andreas Hailu updated PARQUET-2051:
-----------------------------------
Description:
Because of this, we're unable to fully leverage the ThreeLevelListWriter
functionality when trying to write Avro lists out using Parquet through the
AvroParquetOutputFormat.
The following record is used for testing:
Schema:
{{{ "type": "record", "name": "NullLists", "namespace": "com.test", "fields": [
\{ "name": "KeyID", "type": "string" }, \{ "name": "NullableList", "type": [
"null", { "type": "array", "items": [ "null", "string" ] } ], "default": null }
] } }}
Record (in basic JSON format, not Avro-JSON spec per se)
{{{ "KeyID": "0", "NullableList": [ "foo", null, "baz" ] }}}
During testing, we see the following exception:
{quote}{{Caused by: java.lang.ClassCastException: repeated binary array
(STRING) is not a group}}
\{{ at org.apache.parquet.schema.Type.asGroupType(Type.java:250)}}
\{{ at
org.apache.parquet.avro.AvroWriteSupport$ThreeLevelListWriter.writeCollection(AvroWriteSupport.java:612)}}
\{{ at
org.apache.parquet.avro.AvroWriteSupport$ListWriter.writeList(AvroWriteSupport.java:397)}}
\{{ at
org.apache.parquet.avro.AvroWriteSupport.writeValueWithoutConversion(AvroWriteSupport.java:355)}}
\{{ at
org.apache.parquet.avro.AvroWriteSupport.writeValue(AvroWriteSupport.java:278)}}
\{{ at
org.apache.parquet.avro.AvroWriteSupport.writeRecordFields(AvroWriteSupport.java:191)}}
\{{ at
org.apache.parquet.avro.AvroWriteSupport.write(AvroWriteSupport.java:165)}}
\{{ at
org.apache.parquet.hadoop.InternalParquetRecordWriter.write(InternalParquetRecordWriter.java:128}}
{quote}
Upon review, it was found that the configuration option that was set in
AvroWriteSupport for the ThreeLevelListWriter,
parquet.avro.write-old-list-structure being set to false, was never shared with
the AvroSchemaConverter.
Once we made this change and tested locally, we observe the record with nulls
in the array being successfully written by AvroParquetOutputFormat.
was:
Because of this, we're unable to fully leverage the ThreeLevelListWriter
functionality when trying to write Avro lists out using Parquet through the
AvroParquetOutputFormat.
The following record is used for testing:
During testing, we see the following exception:
{quote}{{Caused by: java.lang.ClassCastException: repeated binary array
(STRING) is not a group}}
{{ at org.apache.parquet.schema.Type.asGroupType(Type.java:250)}}
{{ at
org.apache.parquet.avro.AvroWriteSupport$ThreeLevelListWriter.writeCollection(AvroWriteSupport.java:612)}}
{{ at
org.apache.parquet.avro.AvroWriteSupport$ListWriter.writeList(AvroWriteSupport.java:397)}}
{{ at
org.apache.parquet.avro.AvroWriteSupport.writeValueWithoutConversion(AvroWriteSupport.java:355)}}
{{ at
org.apache.parquet.avro.AvroWriteSupport.writeValue(AvroWriteSupport.java:278)}}
{{ at
org.apache.parquet.avro.AvroWriteSupport.writeRecordFields(AvroWriteSupport.java:191)}}
{{ at
org.apache.parquet.avro.AvroWriteSupport.write(AvroWriteSupport.java:165)}}
{{ at
org.apache.parquet.hadoop.InternalParquetRecordWriter.write(InternalParquetRecordWriter.java:128}}
{quote}
Upon review, it was found that the configuration option that was set in
AvroWriteSupport for the ThreeLevelListWriter,
parquet.avro.write-old-list-structure being set to false, was never shared with
the AvroSchemaConverter.
Once we made this change and tested locally, we observe the record with nulls
in the array being successfully written by AvroParquetOutputFormat.
> AvroWriteSupport does not pass Configuration to AvroSchemaConverter on
> Creation
> -------------------------------------------------------------------------------
>
> Key: PARQUET-2051
> URL: https://issues.apache.org/jira/browse/PARQUET-2051
> Project: Parquet
> Issue Type: Bug
> Reporter: Andreas Hailu
> Priority: Major
>
> Because of this, we're unable to fully leverage the ThreeLevelListWriter
> functionality when trying to write Avro lists out using Parquet through the
> AvroParquetOutputFormat.
> The following record is used for testing:
> Schema:
> {{{ "type": "record", "name": "NullLists", "namespace": "com.test", "fields":
> [ \{ "name": "KeyID", "type": "string" }, \{ "name": "NullableList", "type":
> [ "null", { "type": "array", "items": [ "null", "string" ] } ], "default":
> null } ] } }}
> Record (in basic JSON format, not Avro-JSON spec per se)
> {{{ "KeyID": "0", "NullableList": [ "foo", null, "baz" ] }}}
> During testing, we see the following exception:
> {quote}{{Caused by: java.lang.ClassCastException: repeated binary array
> (STRING) is not a group}}
> \{{ at org.apache.parquet.schema.Type.asGroupType(Type.java:250)}}
> \{{ at
> org.apache.parquet.avro.AvroWriteSupport$ThreeLevelListWriter.writeCollection(AvroWriteSupport.java:612)}}
> \{{ at
> org.apache.parquet.avro.AvroWriteSupport$ListWriter.writeList(AvroWriteSupport.java:397)}}
> \{{ at
> org.apache.parquet.avro.AvroWriteSupport.writeValueWithoutConversion(AvroWriteSupport.java:355)}}
> \{{ at
> org.apache.parquet.avro.AvroWriteSupport.writeValue(AvroWriteSupport.java:278)}}
> \{{ at
> org.apache.parquet.avro.AvroWriteSupport.writeRecordFields(AvroWriteSupport.java:191)}}
> \{{ at
> org.apache.parquet.avro.AvroWriteSupport.write(AvroWriteSupport.java:165)}}
> \{{ at
> org.apache.parquet.hadoop.InternalParquetRecordWriter.write(InternalParquetRecordWriter.java:128}}
> {quote}
> Upon review, it was found that the configuration option that was set in
> AvroWriteSupport for the ThreeLevelListWriter,
> parquet.avro.write-old-list-structure being set to false, was never shared
> with the AvroSchemaConverter.
> Once we made this change and tested locally, we observe the record with nulls
> in the array being successfully written by AvroParquetOutputFormat.
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