[ARROW-11936] Rust/Java incorrect serialization of Struct wrapped Int8Dictionary

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 3.0.0
• Component/s: Java, Rust
• Labels: serialization
• External issue URL: https://github.com/apache/arrow/issues/27772
• Assignee: Unassigned
• Reporter: Justin
• Created: 11/Mar/21 20:06
• Updated: 11/Jan/23 08:23
• Resolved: 26/Apr/21 12:50

Description

Using rust, serialized datatype to a file with a schema of

Field { name: "val", data_type: Struct([Field { name: "val", data_type: Utf8, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: None }]), nullable: false, dict_id: 0, dict_is_ordered: false, metadata: None }

Using a java client to read the serialized datatype results in a schema of

Schema<val: Struct<val: Utf8 not null> not null>

whilst calling ArrowFileReader.loadNextBatch() results in

Exception in thread "main" java.util.NoSuchElementExceptionException in thread "main" java.util.NoSuchElementException at java.base/java.util.ArrayList$Itr.next(ArrayList.java:1000) at org.apache.arrow.vector.VectorLoader.loadBuffers(VectorLoader.java:81) at org.apache.arrow.vector.VectorLoader.loadBuffers(VectorLoader.java:99) at org.apache.arrow.vector.VectorLoader.load(VectorLoader.java:61) at org.apache.arrow.vector.ipc.ArrowReader.loadRecordBatch(ArrowReader.java:205) at org.apache.arrow.vector.ipc.ArrowFileReader.loadNextBatch(ArrowFileReader.java:153)