apache / apache/parquet-java

Issues when using the head on a parquet file

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Component: Parquet Priority: Major Type: bug
Dominant language
Java
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Description

```

**$** parquet head train-00000-of-00001-15a05aeec7726f9d.parquet       

Unknown error

shaded.parquet.org.apache.avro.SchemaParseException: Illegal character in: original-instruction

at shaded.parquet.org.apache.avro.Schema.validateName(Schema.java:1607)

at shaded.parquet.org.apache.avro.Schema.access$400(Schema.java:92)

at shaded.parquet.org.apache.avro.Schema$Field.(Schema.java:556)

at shaded.parquet.org.apache.avro.Schema$Field.(Schema.java:595)

at org.apache.parquet.avro.AvroSchemaConverter.convertFields(AvroSchemaConverter.java:295)

at org.apache.parquet.avro.AvroSchemaConverter.convert(AvroSchemaConverter.java:279)

at org.apache.parquet.cli.util.Schemas.fromParquet(Schemas.java:89)

at org.apache.parquet.cli.BaseCommand.getAvroSchema(BaseCommand.java:405)

at org.apache.parquet.cli.commands.CatCommand.run(CatCommand.java:66)

at org.apache.parquet.cli.Main.run(Main.java:163)

at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)

at org.apache.parquet.cli.Main.main(Main.java:193)

```

this is the dataset in question: https://huggingface.co/datasets/argilla/databricks-dolly-15k-curated-en/tree/main/data

**Reporter**: [Rémy Léone](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=remyleone) / @remyleone

**Note**: *This issue was originally created as [PARQUET-2377](https://issues.apache.org/jira/browse/PARQUET-2377). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*

Contributor guide

No contributing guide indexed for this repository

Research direction

Reproduce the failure with the linked Parquet file using the parquet head command, then trace the stack through CatCommand, BaseCommand.getAvroSchema, and Schemas.fromParquet into AvroSchemaConverter. Done means head can process this file despite the original-instruction field name, with a regression test covering the behavior if the existing test structure identifies a suitable location.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
cli
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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