我有一个集群运行最近从CDH3升级的CDH4。 Hive目前工作得很好。但是,我似乎无法让它运行简单的MR Streaming作业(版本1)。纱线已安装但未使用。 下面是一个命令行输入和输出使用MR1运行简单的MapReduce Streaming作业失败CDH4
$ /usr/lib/hadoop/bin/hadoop jar /usr/lib/hadoop-0.20-mapreduce/contrib/streaming/hadoop- streaming-2.0.0-mr1-cdh4.0.0.jar grep -input /input -output /output/ 'dfs[a-z.]+'
检查日志揭示了这一点:
packageJobJar: [/tmp/hadoop-hdfs/hadoop-unjar7491355516546899751/] [] /tmp/streamjob1375201380112960182.jar tmpDir=null
12/07/12 07:26:29 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same.
12/07/12 07:26:29 INFO util.NativeCodeLoader: Loaded the native-hadoop library
12/07/12 07:26:29 WARN snappy.LoadSnappy: Snappy native library is available
12/07/12 07:26:29 INFO snappy.LoadSnappy: Snappy native library loaded
12/07/12 07:26:29 INFO mapred.FileInputFormat: Total input paths to process : 3
12/07/12 07:26:29 INFO streaming.StreamJob: getLocalDirs(): [file:////data/hadoop-0.20/cache/mapred/mapred/local]
12/07/12 07:26:29 INFO streaming.StreamJob: Running job: job_201207120604_0018
12/07/12 07:26:29 INFO streaming.StreamJob: To kill this job, run:
12/07/12 07:26:29 INFO streaming.StreamJob: UNDEF/bin/hadoop job -Dmapred.job.tracker=frost:54311 -kill job_201207120604_0018
12/07/12 07:26:29 INFO streaming.StreamJob: Tracking URL: >http://alpha:50030/jobdetails.jsp?jobid=job_201207120604_0018
12/07/12 07:26:30 INFO streaming.StreamJob: map 0% reduce 0%
12/07/12 07:26:57 INFO streaming.StreamJob: map 100% reduce 100%
12/07/12 07:26:57 INFO streaming.StreamJob: To kill this job, run:
12/07/12 07:26:57 INFO streaming.StreamJob: UNDEF/bin/hadoop job -Dmapred.job.tracker=frost:54311 -kill job_201207120604_0018
12/07/12 07:26:57 INFO streaming.StreamJob: Tracking URL: >http://alpha:50030/jobdetails.jsp?jobid=job_201207120604_0018
12/07/12 07:26:57 ERROR streaming.StreamJob: Job not successful. Error: NA
12/07/12 07:26:57 INFO streaming.StreamJob: killJob...
Streaming Command Failed!
日志输出了很多失误的减少任务:
2012-07-12 07:26:46,785 INFO org.apache.hadoop.mapred.TaskInProgress: Error from attempt_201207120604_0018_m_000001_2: java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved org.apache.hadoop.io.LongWritable
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:861)
at org.apache.hadoop.mapred.MapTask$OldOutputCollector.collect(MapTask.java:501)
at org.apache.hadoop.mapred.lib.IdentityMapper.map(IdentityMapper.java:38)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:393)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:327)
at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:416)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232)
at org.apache.hadoop.mapred.Child.main(Child.java:264)
感谢好心,卡丁车。
谢谢克里斯。我第一次尝试设置以下属性为mapred-site.xml中 mapred.input.format.class org.apache.hadoop.mapred.TextInputFormat 但奥斯卡最佳吨工作。但是以下两个性质化险为夷: stream.map.input typedbytes stream.reduce.input typedbytes –
Kart
2012-07-19 23:10:00