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

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
42/100
Issue 类型
缺陷
描述清晰度
需要澄清
活跃度
冷清
技术栈
java
领域
data-engineering

调研方向

从 PlainValuesDictionary.decodeToInt、DictionaryValuesReader.readInteger 以及堆栈跟踪中显示的 ColumnReaderBase 调用链开始。调查读取字典编码页面时字典 ID 的生成方式，并以报告中的 13 项字典和 ID 14 作为参考案例。完成的标准是：受影响的页面可以在不发生字典越界访问的情况下读取，并且间歇性故障已由回归测试覆盖。

由索引模型根据 Issue 内容生成。

描述

Type: bug
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:

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:

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 
org.apache.parquet.io.ParquetDecodingException: Can not read value at 292293 in block 0 in file <sanitized-parquet-file-path>
    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)

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