hadoop入門(mén)實(shí)戰(zhàn)手冊(cè)

1、北京寬連十方數(shù)字技術(shù)有限公司公開(kāi)內(nèi)部公開(kāi)√機(jī)密絕密Hadoop入門(mén)實(shí)戰(zhàn)手冊(cè)入門(mén)實(shí)戰(zhàn)手冊(cè)北京寬連十方數(shù)字技術(shù)有限公司北京寬連十方數(shù)字技術(shù)有限公司技術(shù)研究部技術(shù)研究部（2011年7月）月）北京寬連十方數(shù)字技術(shù)有限公司公開(kāi)內(nèi)部公開(kāi)√機(jī)密絕密5.2.2Hadoop框架下的mapreduce.........................................................................285.3綜

2、合架構(gòu)分析.......................................................................................................296Hadoop的應(yīng)用....................................................................................................

3、.......317系統(tǒng)維護(hù)....................................................................................................................317.1Hadoop的系統(tǒng)監(jiān)控..........................................................................

4、....................317.2Hadoop中的命令（Comm）總結(jié)..................................................................327.3NameNode與JobTracker單點(diǎn)故障說(shuō)明...............................................................327.4經(jīng)驗(yàn)總結(jié).........

5、.....................................................................................................327.5如何在一個(gè)hadoop集群新增或刪除一些機(jī)器而不重啟........................................337.5.1新增節(jié)點(diǎn).....................................

6、...................................................................337.5.2刪除節(jié)點(diǎn)........................................................................................................347.6其它日常問(wèn)題說(shuō)明.........................

7、......................................................................367.6.1datanode啟動(dòng)失敗，各slave節(jié)點(diǎn)的namespaceIDs與masters不同...............367.6.2taskTracker和jobTracker啟動(dòng)失敗...................................................

8、............377.6.3ShuffleErr:ExceededMAX_FAILED_UNIQUE_FETCHESbailingout...377.6.4Toomanyfetchfailures.................................................................................387.6.5能夠啟動(dòng)datanode，但無(wú)法訪問(wèn)，也無(wú)法結(jié)束的錯(cuò)誤..

9、.................................387.6.6java.io.IOException:Couldnotobtainblock:.................................................387.6.7java.lang.OutOfMemyErr:Javaheapspace...........................................387.6

10、.8解決hadoopOutOfMemyErr問(wèn)題：.........................................................397.6.9Hadoopjava.io.IOException:.........................................................................397.7防火墻的端口開(kāi)放要求.................

11、.......................................................................397.7.1與HDFS有關(guān)的地址及端口屬性.....................................................................397.7.2與MapReduce有關(guān)的地址及端口屬性...............................

12、...........................418附錄...........................................................................................................................428.1hadoop歷史....................................................

13、.....................................................428.2Hadoop大記事.....................................................................................................438.3Hadoop的幾個(gè)主要子項(xiàng)目.................................

14、..................................................448.4官方集群搭建參考...............................................................................................448.4.1配置文件...................................................