Hive报错整理之Malformed ORC file 、Invalid postscript.

最新推荐文章于 2022-09-09 16:56:49 发布

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最新推荐文章于 2022-09-09 16:56:49 发布

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文章标签：大数据 java

原文链接：https://segmentfault.com/a/1190000011168852

本文介绍在Hive中加载ORC格式文件时遇到的“Malformed ORC file”错误及其解决方法。错误发生的原因是尝试直接从非ORC格式的文件加载数据。解决方案包括将源表转换为ORC格式或通过临时TextFile表进行数据转换。

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Caused by: java.io.IOException: Malformed ORC file

将本地文件的数据加载到hive的ORC格式表时，出现以下报错：

Diagnostic Messages for this Task:
Error: java.io.IOException: java.lang.reflect.InvocationTargetException
        at org.apache.hadoop.hive.io.HiveIOExceptionHandlerChain.handleRecordReaderCreationException(HiveIOExceptionHandlerChain.java:97)
        at org.apache.hadoop.hive.io.HiveIOExceptionHandlerUtil.handleRecordReaderCreationException(HiveIOExceptionHandlerUtil.java:57)
        at org.apache.hadoop.hive.shims.HadoopShimsSecure$CombineFileRecordReader.initNextRecordReader(HadoopShimsSecure.java:295)
        at org.apache.hadoop.hive.shims.HadoopShimsSecure$CombineFileRecordReader.<init>(HadoopShimsSecure.java:242)
        at org.apache.hadoop.hive.shims.HadoopShimsSecure$CombineFileInputFormatShim.getRecordReader(HadoopShimsSecure.java:356)
        at org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getRecordReader(CombineHiveInputFormat.java:591)
        at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.<init>(MapTask.java:168)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:409)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:342)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.apache.hadoop.hive.shims.HadoopShimsSecure$CombineFileRecordReader.initNextRecordReader(HadoopShimsSecure.java:281)
        ... 11 more
Caused by: java.io.IOException: Malformed ORC file hdfs://bigdata01.ibeifeng.com:8020/user/hive/warehouse/track_logs.db/track_log/date=20160323/20160323. Invalid postscript.
        at org.apache.hadoop.hive.ql.io.orc.ReaderImpl.ensureOrcFooter(ReaderImpl.java:226)
        at org.apache.hadoop.hive.ql.io.orc.ReaderImpl.extractMetaInfoFromFooter(ReaderImpl.java:336)
        at org.apache.hadoop.hive.ql.io.orc.ReaderImpl.<init>(ReaderImpl.java:292)
        at org.apache.hadoop.hive.ql.io.orc.OrcFile.createReader(OrcFile.java:197)
        at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat.getRecordReader(OrcInputFormat.java:997)
        at org.apache.hadoop.hive.ql.io.CombineHiveRecordReader.<init>(CombineHiveRecordReader.java:65)
        ... 16 more


FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask
MapReduce Jobs Launched: 
Job 0: Map: 1  Reduce: 1   HDFS Read: 0 HDFS Write: 0 FAIL
Total MapReduce CPU Time Spent: 0 msec

原因：
ORC格式是列式存储的表，不能直接从本地文件导入数据，只有当数据源表也是ORC格式存储时，才可以直接加载，否则会出现上述报错。

解决办法：
要么将数据源表改为以ORC格式存储的表，要么新建一个以textfile格式的临时表先将源文件数据加载到该表，然后在从textfile表中insert数据到ORC目标表中。