apache / apache/parquet-java

[parquet-java] Intermittent out-of-bounds dictionary ID when reading dictionary-encoded Parquet pages

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Beschreibung

### Describe the bug, including details regarding any error messages, version, and platform.

## Description

We intermittently encounter a `ParquetDecodingException` when reading Parquet files written by Apache Hudi with Spark.

The issue cannot be reproduced consistently for every write, but it has occurred repeatedly across different write jobs.

The failures have a similar call chain: while reading a dictionary-encoded data page, parquet-java decodes a dictionary ID that is outside the range of the current dictionary. `PlainValuesDictionary` then attempts to access the dictionary array with that ID and throws an `ArrayIndexOutOfBoundsException`.

In the representative case below, the affected column is:

```text
optional int32 chan_second_cate_cd
```

The dictionary contains 13 entries, so the valid dictionary IDs are `0` through `12`. However, the data page produces dictionary ID `14`, resulting in:

```text
java.lang.ArrayIndexOutOfBoundsException: Index 14 out of bounds for length 13
```

This failure occurs in row group `0`, at column value `292293` out of `478848`, and at value `12293` out of `20000` in the current data page.

The value `14` is an internal Parquet dictionary ID, not the actual value stored in the column.

## Environment

| Component | Version |
| --- | --- |
| Apache Hudi | `0.13.1` |
| Write engine | Apache Spark `3.4` |
| parquet-mr | `1.12.3` |

## Representative Stack Trace

Click to expand

```text
org.apache.parquet.io.ParquetDecodingException: Can not read value at 292293 in block 0 in file
at org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:264)
at org.apache.parquet.hadoop.ParquetRecordReader.nextKeyValue(ParquetRecordReader.java:207)
at org.apache.spark.sql.execution.datasources.RecordReaderIterator.hasNext(RecordReaderIterator.scala:39)
at org.apache.spark.sql.execution.datasources.RecordReaderIterator$$anon$1.hasNext(RecordReaderIterator.scala:61)
at org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:125)
at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:460)
at org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown Source)
at org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at org.apache.spark.sql.execution.WholeStageCodegenExec$$anon$1.hasNext(WholeStageCodegenExec.scala:760)
at org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:140)
at org.apache.spark.shuffle.ShuffleWriteProcessor.write(ShuffleWriteProcessor.scala:59)
at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:101)
at org.apache.spark.scheduler.Task.run(Task.scala:140)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:565)

Caused by: org.apache.parquet.io.ParquetDecodingException: Can't read value in column [chan_second_cate_cd] optional int32 chan_second_cate_cd at value 292293 out of 478848, 12293 out of 20000 in currentPage. repetition level: 0, definition level: 1
at org.apache.parquet.column.impl.ColumnReaderBase.readValue(ColumnReaderBase.java:553)
at org.apache.parquet.column.impl.ColumnReaderImpl.readValue(ColumnReaderImpl.java:30)
at org.apache.parquet.column.impl.ColumnReaderBase.writeCurrentValueToConverter(ColumnReaderBase.java:439)
at org.apache.parquet.column.impl.ColumnReaderImpl.writeCurrentValueToConverter(ColumnReaderImpl.java:30)
at org.apache.parquet.io.RecordReaderImplementation.read(RecordReaderImplementation.java:406)
at org.apache.parquet.hadoop.InternalParquetRecordReader.nextKeyValue(InternalParquetRecordReader.java:234)

Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 14 out of bounds for length 13
at org.apache.parquet.column.values.dictionary.PlainValuesDictionary$PlainIntegerDictionary.decodeToInt(PlainValuesDictionary.java:251)
at org.apache.parquet.column.values.dictionary.DictionaryValuesReader.readInteger(DictionaryValuesReader.java:108)
at org.apache.parquet.column.impl.ColumnReaderBase$2$3.read(ColumnReaderBase.java:279)
at org.apache.parquet.column.impl.ColumnReaderBase.readValue(ColumnReaderBase.java:533)
```

### Component(s)

_No response_

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Rechercherichtung

Beginne mit PlainValuesDictionary.decodeToInt, DictionaryValuesReader.readInteger und der in der Stacktrace gezeigten Aufrufkette von ColumnReaderBase. Untersuche, wie Wörterbuch-IDs beim Lesen von seiten mit Wörterbuchkodierung erzeugt werden, wobei das gemeldete Wörterbuch mit 13 Einträgen und die ID 14 als Referenzfall dienen. Die Aufgabe ist abgeschlossen, wenn die betroffenen Seiten ohne einen Zugriff außerhalb der Grenzen des Wörterbuchs gelesen werden können und der intermittierende Fehler durch einen Regressionstest abgedeckt ist.

Vom Indexierungsmodell aus dem Issue-Text verfasst.

Bewertung

Tech-Stack
java
Bereich
data-engineering
Issue-Typ
Bug
Schwierigkeit
4/5
Geschätzter Aufwand
3-5 Tage
Aktivitätsstatus
Ruhig
Klarheit
Muss geklärt werden
Anfängerfreundlichkeit
42/100

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