在加载orc外部表时，在定义为decimal（31,8）的列中有一个空值，我遇到了一个关于配置单元的问题。看起来hive在加载后无法读取orc文件，并且无法再查看该字段中包含null的记录。同一orc文件中的其他记录可以很好地读取。
这只是最近才发生的，我们没有对配置单元版本进行任何更改。令人惊讶的是，以前加载到同一个表中的orc文件在十进制字段中为空，因此可以毫无疑问地进行查询。
我们正在使用Hive1.2.1。下面是hive输出的完整堆栈跟踪，我用

org.apache.hive.service.cli.HiveSQLException: java.io.IOException: java.io.IOException: Error reading file: <hdfs location>
        at org.apache.hive.service.cli.operation.SQLOperation.getNextRowSet(SQLOperation.java:352)
        at org.apache.hive.service.cli.operation.OperationManager.getOperationNextRowSet(OperationManager.java:220)
        at org.apache.hive.service.cli.session.HiveSessionImpl.fetchResults(HiveSessionImpl.java:685)
        at org.apache.hive.service.cli.CLIService.fetchResults(CLIService.java:454)
        at org.apache.hive.service.cli.thrift.ThriftCLIService.FetchResults(ThriftCLIService.java:672)
        at org.apache.hive.service.cli.thrift.TCLIService$Processor$FetchResults.getResult(TCLIService.java:1553)
        at org.apache.hive.service.cli.thrift.TCLIService$Processor$FetchResults.getResult(TCLIService.java:1538)
        at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
        at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
        at org.apache.hive.service.auth.TSetIpAddressProcessor.process(TSetIpAddressProcessor.java:56)
        at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:285)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: java.io.IOException: Error reading file: <hdfs location>
        at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:507)
        at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:414)
        at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:140)
        at org.apache.hadoop.hive.ql.Driver.getResults(Driver.java:1670)
        at org.apache.hive.service.cli.operation.SQLOperation.getNextRowSet(SQLOperation.java:347)
        ... 13 more
Caused by: java.io.IOException: Error reading file: <hdfs location>
        at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl.next(RecordReaderImpl.java:1051)
        at org.apache.hadoop.hive.ql.io.orc.OrcRawRecordMerger$OriginalReaderPair.next(OrcRawRecordMerger.java:263)
        at org.apache.hadoop.hive.ql.io.orc.OrcRawRecordMerger.next(OrcRawRecordMerger.java:547)
        at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat$1.next(OrcInputFormat.java:1235)
        at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat$1.next(OrcInputFormat.java:1219)
        at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat$NullKeyRecordReader.next(OrcInputFormat.java:1151)
        at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat$NullKeyRecordReader.next(OrcInputFormat.java:1137)
        at org.apache.hadoop.hive.ql.exec.FetchOperator.getNextRow(FetchOperator.java:474)
        ... 17 more
Caused by: java.io.EOFException: Reading BigInteger past EOF from compressed stream Stream for column 6 kind DATA position: 201 length: 201 range: 0 offset: 289 limit: 289 range 0 = 0 to 201 uncompressed: 362 to 362
        at org.apache.hadoop.hive.ql.io.orc.SerializationUtils.readBigInteger(SerializationUtils.java:176)
        at org.apache.hadoop.hive.ql.io.orc.TreeReaderFactory$DecimalTreeReader.next(TreeReaderFactory.java:1264)
        at org.apache.hadoop.hive.ql.io.orc.TreeReaderFactory$StructTreeReader.next(TreeReaderFactory.java:2004)
        at org.apache.hadoop.hive.ql.io.orc.RecordReaderImpl.next(RecordReaderImpl.java:1044)
        ... 24 more