MapReduce 读取 Hive ORC ArrayIndexOutOfBoundsException: 1024 异常解决

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在MR处理ORC的时候遇到如下异常：

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1024
	at org.apache.orc.impl.RunLengthIntegerReaderV2.nextVector    (RunLengthIntegerReaderV2.java:369)
	at org.apache.orc.impl.TreeReaderFactory$BytesColumnVectorUtil.commonReadByteArrays    (TreeReaderFactory.java:1231)
	at org.apache.orc.impl.TreeReaderFactory$BytesColumnVectorUtil.readOrcByteArrays    (TreeReaderFactory.java:1268)
	at org.apache.orc.impl.TreeReaderFactory$StringDirectTreeReader.nextVector    (TreeReaderFactory.java:1368)
	at org.apache.orc.impl.TreeReaderFactory$StringTreeReader.nextVector    (TreeReaderFactory.java:1212)
	at org.apache.orc.impl.TreeReaderFactory$ListTreeReader.nextVector    (TreeReaderFactory.java:1902)
	at org.apache.orc.impl.TreeReaderFactory$StructTreeReader.nextBatch    (TreeReaderFactory.java:1737)
	at org.apache.orc.impl.RecordReaderImpl.nextBatch(RecordReaderImpl.java:1045)
	at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl.ensureBatch(RecordReaderImpl.java:77)
	at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl.hasNext(RecordReaderImpl.java:89)

通过搜索发现这个Bug在Hive 2.1.1版本中已经修复。我使用的就是这个版本，检查对应的源代码发现代码是已经按照下面的Patch修复过得：[[HIVE-14483] java.lang.ArrayIndexOutOfBoundsException org.apache.orc.impl.TreeReaderFactoryBytesColumnVectorUtil.commonReadByteArrays - ASF JIRA](https://issues.apache.org/jira/browse/HIVE-14483 "[HIVE-14483] java.lang.ArrayIndexOutOfBoundsException org.apache.orc.impl.TreeReaderFactoryBytesColumnVectorUtil.commonReadByteArrays - ASF JIRA")

通过反编译发现我最终打包后的代码中使用的是未修复Bug的代码版本。通过依赖包发现依赖的以下模块中也包含ORC的Jar：

<dependency>
    <groupId>org.apache.orc</groupId>
    <artifactId>orc-mapreduce</artifactId>
    <version>1.1.0</version>
</dependency>

解决方法是将orc-mapreduce包升级到1.1.2版本，依赖配置如下：

<dependency>
    <groupId>org.apache.orc</groupId>
    <artifactId>orc-mapreduce</artifactId>
    <version>1.1.2</version>
</dependency>