hive在实际运行压缩模式中出现的问题

最新推荐文章于 2025-06-29 15:39:31 发布

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最新推荐文章于 2025-06-29 15:39:31 发布

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分类专栏： hive

本文链接：https://blog.youkuaiyun.com/chenyi8888/article/details/17142235

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本文讨论了Hadoop MapReduce任务中遇到的问题，包括Snappy压缩文件导致的IOException异常、部分表采用GZ压缩读取时出现乱码的情况以及Map数量异常增加的现象。

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问题1：

java.io.IOException: IO error in map input file hdfs://master:8020/tmp/hive-hadoop/hive_2013-12-05_14-11-45_842_4285479348256958995/-ext-10033/000267_0.snappy
	at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.moveToNext(MapTask.java:242)
	at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.next(MapTask.java:216)
	at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48)
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:436)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
	at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
	at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.io.IOException: java.io.EOFException
	at org.apache.hadoop.hive.io.HiveIOExceptionHandlerChain.handleRecordReaderNextException(HiveIOExceptionHandlerChain.java:121)
	at org.apache.hadoop.hive.io.HiveIOExceptionHandlerUtil.handleRecordReaderNextException(HiveIOExceptionHandlerUtil.java:77)
	at org.apache.hadoop.hive.ql.io.HiveContextAwareRecordReader.doNext(HiveContextAwareRecordReader.java:276)
	at org.apache.hadoop.hive.ql.io.HiveRecordReader.doNext(HiveRecordReader.java:79)
	at org.apache.hadoop.hive.ql.io.HiveRecordReader.doNext(HiveRecordReader.java:33)
	at org.apache.hadoop.hive.ql.io.HiveContextAwareRecordReader.next(HiveContextAwareRecordReader.java:108)
	at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.moveToNext(MapTask.java:236)
	... 8 more
Caused by: java.io.EOFException
	at org.apache.hadoop.io.compress.BlockDecompressorStream.rawReadInt(BlockDecompressorStream.java:126)
	at org.apache.hadoop.io.compress.BlockDecompressorStream.getCompressedData(BlockDecompressorStream.java:98)
	at org.apache.hadoop.io.compress.BlockDecompressorStream.decompress(BlockDecompressorStream.java:82)
	at org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:76)
	at java.io.InputStream.read(InputStream.java:82)
	at org.apache.hadoop.util.LineReader.readLine(LineReader.java:134)
	at org.apache.hadoop.mapred.LineRecordReader.next(LineRecordReader.java:133)
	at org.apache.hadoop.mapred.LineRecordReader.next(LineRecordReader.java:38)
	at org.apache.hadoop.hive.ql.io.HiveContextAwareRecordReader.doNext(HiveContextAwareRecordReader.java:274)
	... 12 more

主要是生成几个snappy文件有问题，如下截图：