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https://issues.apache.org/jira/browse/ORC-1167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17533363#comment-17533363
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Dongjoon Hyun commented on ORC-1167:
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Thank you for filing a JIRA and making a PR, [~dzcxzl]
> Support orc.row.batch.size configuration
> ----------------------------------------
>
> Key: ORC-1167
> URL: https://issues.apache.org/jira/browse/ORC-1167
> Project: ORC
> Issue Type: Improvement
> Reporter: dzcxzl
> Priority: Minor
>
> Now create OrcMapreduceRecordReader, the default value of batch size is 1024,
> we can support the configuration in Reader.Options.
>
> If we read 1024 relatively large strings, we might get
> NegativeArraySizeException, but no configuration to reduce batch size.
>
> {code:java}
> java.lang.NegativeArraySizeException
> at
> org.apache.orc.impl.TreeReaderFactory$BytesColumnVectorUtil.commonReadByteArrays(TreeReaderFactory.java:1544)
> at
> org.apache.orc.impl.TreeReaderFactory$BytesColumnVectorUtil.readOrcByteArrays(TreeReaderFactory.java:1566)
> at
> org.apache.orc.impl.TreeReaderFactory$StringDirectTreeReader.nextVector(TreeReaderFactory.java:1662)
> at
> org.apache.orc.impl.TreeReaderFactory$StringTreeReader.nextVector(TreeReaderFactory.java:1508)
> at
> org.apache.orc.impl.TreeReaderFactory$StructTreeReader.nextBatch(TreeReaderFactory.java:2047)
> at
> org.apache.orc.impl.RecordReaderImpl.nextBatch(RecordReaderImpl.java:1219)
> at
> org.apache.orc.mapreduce.OrcMapreduceRecordReader.ensureBatch(OrcMapreduceRecordReader.java:84)
> at
> org.apache.orc.mapreduce.OrcMapreduceRecordReader.nextKeyValue(OrcMapreduceRecordReader.java:102)
> at
> org.apache.spark.sql.execution.datasources.RecordReaderIterator.hasNext(RecordReaderIterator.scala:39)
> {code}
>
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