cxzl25 opened a new pull request, #1108:
URL: https://github.com/apache/orc/pull/1108
### What changes were proposed in this pull request?
Support `orc.row.batch.size` configuration in `Reader.Options`.
### Why are the changes needed?
Now create `OrcMapreduceRecordReader`, the default value of batch size is
1024.
If we read 1024 relatively large strings, we might get
`NegativeArraySizeException`, but no configuration to reduce batch size.
```
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)
```
### How was this patch tested?
Production environment verification
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