Datasets:

criyle
/

codenet-compile-errors-v2

license: apache-2.0
task_categories:
  - text-classification
language:
  - en
tags:
  - java
  - compile-errors
  - codenet
  - education
pretty_name: CodeNet Java compile errors v2
size_categories:
  - 10K<n<100K

CodeNet Java compile errors v2

This is a new, Java-only corpus rebuilt from iNeil77/CodeNet (the Java split, status == "Compile Error"). It is deliberately separate from criyle/codenet-compile-errors, which used the old Main.java convention and did not carry user/problem/date metadata.

What is different

Each submission is written to the file name javac asks for — the single public top-level class it declares, or Main.java when there is no such class or more than one. Submissions that compile cleanly under that name are file-name artefacts, not student errors; they are kept in compiled_all.parquet but excluded from this dataset.

The source-name fix is why this corpus is smaller than the raw Compile Error set: 18,465 of 53,023 submissions compiled cleanly once the file was named after the class. 34,555 still fail and are the rows of this dataset.

Metadata for session grouping

Unlike the old dataset, each row keeps:

Column	Meaning
`row_id`	stable `v2_<sid>` id
`sid`, `submission_id`	CodeNet submission id
`pid`, `problem_id`	CodeNet problem id
`uid`, `user_id`	CodeNet user id
`date`, `date_iso`	CodeNet submission time
`source_name`	file name used for the compile (`Foo.java` / `Main.java`)
`code`, `compilemessage`	source and javac stderr
`session_id`	`(uid, pid)` 2-hour session
`session_6h`	6-hour variant

session_id is a contiguous run of submissions by one user on one problem, with a new session when the gap exceeds 2 hours. It is computed on the full Java split (accepted submissions included), so a user's accepted submission still closes the session boundary.

Labels

category is intentionally empty and label_status is unlabelled. The v2.1 taxonomy (categories.v2.yaml) is included, but labelling is a separate LLM pass with its own calibration gates. No v1 labels are mixed into the category column.

Provenance

source: iNeil77/CodeNet, Java split
filter: status == 'Compile Error'
sandbox: http://10.0.0.162:5050
javac: OpenJDK 21.0.12.1
session gap: 2 h (6 h alternative)
built at: 2026-10-20T02:28:07.997126+00:00

Files

train — the still-failing submissions (corpus_v2.parquet)
compiled_all.parquet — every compile attempt, including file-name artefacts
session_map_all.parquet — session map over the full Java split
categories.v2.yaml — active v2.1 taxonomy
source_manifest.json — counts, hashes and build parameters

Licence

CodeNet is Apache-2.0. This derived corpus is released under the same terms.