Hadoop的數據流將使用Python蒙戈 - Hadoop的

Question

我試圖讓使用蒙戈 - Hadoop的地圖，減少與Python功能。 Hadoop正在工作，hadoop streaming正在與python和mongo-hadoop適配器一起工作。但是，使用python的mongo-hadoop流式示例無法正常工作。當試圖在流/例子/國庫運行的例子中，我得到以下錯誤：

$user@host: ~/git/mongo-hadoop/streaming$ hadoop jar target/mongo-hadoop-streaming-assembly-1.0.1.jar -mapper examples/treasury/mapper.py -reducer examples/treasury/reducer.py -inputformat com.mongodb.hadoop.mapred.MongoInputFormat -outputformat com.mongodb.hadoop.mapred.MongoOutputFormat -inputURI mongodb://127.0.0.1/mongo_hadoop.yield_historical.in -outputURI mongodb://127.0.0.1/mongo_hadoop.yield_historical.streaming.out

13/04/09 11:54:34 INFO streaming.MongoStreamJob: Running 

13/04/09 11:54:34 INFO streaming.MongoStreamJob: Init 

13/04/09 11:54:34 INFO streaming.MongoStreamJob: Process Args 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Setup Options' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: PreProcess Args 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Parse Options 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: '-mapper' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: 'examples/treasury/mapper.py' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: '-reducer' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: 'examples/treasury/reducer.py' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: '-inputformat' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: 'com.mongodb.hadoop.mapred.MongoInputFormat' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: '-outputformat' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: 'com.mongodb.hadoop.mapred.MongoOutputFormat' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: '-inputURI' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: 'mongodb://127.0.0.1/mongo_hadoop.yield_historical.in' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: '-outputURI' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Arg: 'mongodb://127.0.0.1/mongo_hadoop.yield_historical.streaming.out' 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Add InputSpecs 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Setup output_ 

13/04/09 11:54:34 INFO streaming.StreamJobPatch: Post Process Args 

13/04/09 11:54:34 INFO streaming.MongoStreamJob: Args processed. 

13/04/09 11:54:36 INFO io.MongoIdentifierResolver: Resolving: bson 

13/04/09 11:54:36 INFO io.MongoIdentifierResolver: Resolving: bson 

13/04/09 11:54:36 INFO io.MongoIdentifierResolver: Resolving: bson 

13/04/09 11:54:36 INFO io.MongoIdentifierResolver: Resolving: bson 

**Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/mapreduce/filecache/DistributedCache** 
    at org.apache.hadoop.streaming.StreamJob.setJobConf(StreamJob.java:959) 
    at com.mongodb.hadoop.streaming.MongoStreamJob.run(MongoStreamJob.java:36) 
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) 
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84) 
    at com.mongodb.hadoop.streaming.MongoStreamJob.main(MongoStreamJob.java:63) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.apache.hadoop.util.RunJar.main(RunJar.java:208) 
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.mapreduce.filecache.DistributedCache 
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247) 
    ... 10 more 

如果有人可以提供一些線索這將是一個很大的幫助。

全部信息：

至於我可以告訴我需要得到以下四兩件事的工作：

1. 安裝和測試的Hadoop
2. 安裝和使用Python
測試Hadoop的流
3. 安裝和測試蒙戈-的hadoop
4. 安裝並用蟒測試蒙戈-hadoop的流

因此，它的缺點是我有一切工作到第四步。使用（https://github.com/danielpoe/cloudera）我已經得到了Cloudera 4安裝

1. 使用廚師食譜4 Cloudera的已安裝並正常運行和測試
2. 使用邁克爾nolls博客教程，測試Hadoop的使用python流成功
3. 使用Google文檔在mongodb.org能夠同時運行國庫UFO和實例（建立build.sbt CDH4）
4. 下載1.5小時值得使用的自述在流/例子嘰嘰喳喳例如Twitter的數據，並且也嘗試了國庫例子。

Answer 1

你有安裝了最新的pymongo_hadoop連接器？你正在運行的其他軟件的版本是什麼？