[jira] (PARQUET-2181) parquet-cli fails at supporting parquet-protobuf generated files

["J Y (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PARQUET-2181 ]


    J Y deleted comment on PARQUET-2181:
    ------------------------------

was (Author: jinyius):
so here's an interesting update.  one of my colleagues who is more familiar with this area suggested that the schema itself is probably too large.  i regenerated this data using a more limited recursion depth, and the parquet-cli tool worked fine.  i'm attaching the set of files that work ([^sample-depth-1.tgz]).

so it seems the core issue here is that there's a hard limit somewhere on the schema sizes... 

> parquet-cli fails at supporting parquet-protobuf generated files
> ----------------------------------------------------------------
>
>                 Key: PARQUET-2181
>                 URL: https://issues.apache.org/jira/browse/PARQUET-2181
>             Project: Parquet
>          Issue Type: Bug
>          Components: parquet-cli
>            Reporter: J Y
>            Priority: Critical
>         Attachments: sample-depth-1.tgz, samples.tgz
>
>
> i generated a parquet file using a protobuf with this proto definition:
> {code:java}
> message IndexPath {
>   // Index of item in path.
>   repeated int32 index = 1;
> }
> message SomeEvent {
>   // truncated/obfuscated wrapper
>   optional IndexPath client_position = 1;
> }
> {code}
> this gets translated to the following parquet schema using the new compliant schema for lists:
> {code:java}
> message SomeEvent {
>   optional group client_position = 1 {
>     optional group index (LIST) = 1 {
>       repeated group list {
>         required int32 element;
>       }
>     }
>   }
> }
> {code}
> this causes parquet-cli cat to barf on a file containing these events:
> {quote}java.lang.RuntimeException: Failed on record 0
>         at org.apache.parquet.cli.commands.CatCommand.run(CatCommand.java:86)
>         at org.apache.parquet.cli.Main.run(Main.java:157)
>         at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
>         at org.apache.parquet.cli.Main.main(Main.java:187)
> Caused by: java.lang.ClassCastException: required int32 element is not a group
>         at org.apache.parquet.schema.Type.asGroupType(Type.java:248)
>         at org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:284)
>         at org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:228)
>         at org.apache.parquet.avro.AvroRecordConverter.access$100(AvroRecordConverter.java:74)
>         at org.apache.parquet.avro.AvroRecordConverter$AvroCollectionConverter$ElementConverter.<init>(AvroRecordConverter.java:539)
>         at org.apache.parquet.avro.AvroRecordConverter$AvroCollectionConverter.<init>(AvroRecordConverter.java:489)
>         at org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:293)
>         at org.apache.parquet.avro.AvroRecordConverter.<init>(AvroRecordConverter.java:137)
>         at org.apache.parquet.avro.AvroRecordConverter.newConverter(AvroRecordConverter.java:284)
>         at org.apache.parquet.avro.AvroRecordConverter.<init>(AvroRecordConverter.java:137)
>         at org.apache.parquet.avro.AvroRecordConverter.<init>(AvroRecordConverter.java:91)
>         at org.apache.parquet.avro.AvroRecordMaterializer.<init>(AvroRecordMaterializer.java:33)
>         at org.apache.parquet.avro.AvroReadSupport.prepareForRead(AvroReadSupport.java:142)
>         at org.apache.parquet.hadoop.InternalParquetRecordReader.initialize(InternalParquetRecordReader.java:190)
>         at org.apache.parquet.hadoop.ParquetReader.initReader(ParquetReader.java:166)
>         at org.apache.parquet.hadoop.ParquetReader.read(ParquetReader.java:135)
>         at org.apache.parquet.cli.BaseCommand$1$1.advance(BaseCommand.java:363)
>         at org.apache.parquet.cli.BaseCommand$1$1.<init>(BaseCommand.java:344)
>         at org.apache.parquet.cli.BaseCommand$1.iterator(BaseCommand.java:342)
>         at org.apache.parquet.cli.commands.CatCommand.run(CatCommand.java:73)
>         ... 3 more
> {quote}
> using the old parquet-tools binary to cat this file works fine.



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