在我们编译源代码的时候，当我们构建成功的时候会输出一些信息
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Apache Hadoop Main ................................. SUCCESS [02:33 min]
[INFO] Apache Hadoop Build Tools .......................... SUCCESS [01:35 min]
[INFO] Apache Hadoop Project POM .......................... SUCCESS [ 51.731 s]
[INFO] Apache Hadoop Annotations .......................... SUCCESS [ 36.272 s]
[INFO] Apache Hadoop Assemblies ........................... SUCCESS [ 0.128 s]
[INFO] Apache Hadoop Project Dist POM ..................... SUCCESS [01:05 min]
[INFO] Apache Hadoop Maven Plugins ........................ SUCCESS [ 44.651 s]
[INFO] Apache Hadoop MiniKDC .............................. SUCCESS [13:35 min]
[INFO] Apache Hadoop Auth ................................. SUCCESS [09:11 min]
[INFO] Apache Hadoop Auth Examples ........................ SUCCESS [ 9.510 s]
[INFO] Apache Hadoop Common ............................... SUCCESS [11:00 min]
[INFO] Apache Hadoop NFS .................................. SUCCESS [ 1.408 s]
[INFO] Apache Hadoop KMS .................................. SUCCESS [01:47 min]
[INFO] Apache Hadoop Common Project ....................... SUCCESS [ 0.045 s]
[INFO] Apache Hadoop HDFS Client .......................... SUCCESS [05:49 min]
[INFO] Apache Hadoop HDFS ................................. SUCCESS [01:12 min]
[INFO] Apache Hadoop HDFS Native Client ................... SUCCESS [ 0.970 s]
[INFO] Apache Hadoop HttpFS ............................... SUCCESS [ 18.891 s]
[INFO] Apache Hadoop HDFS BookKeeper Journal .............. SUCCESS [ 54.711 s]
[INFO] Apache Hadoop HDFS-NFS ............................. SUCCESS [ 1.455 s]
[INFO] Apache Hadoop HDFS Project ......................... SUCCESS [ 0.038 s]
[INFO] Apache Hadoop YARN ................................. SUCCESS [ 0.038 s]
[INFO] Apache Hadoop YARN API ............................. SUCCESS [ 8.119 s]
[INFO] Apache Hadoop YARN Common .......................... SUCCESS [07:25 min]
[INFO] Apache Hadoop YARN Server .......................... SUCCESS [ 0.036 s]
[INFO] Apache Hadoop YARN Server Common ................... SUCCESS [01:23 min]
[INFO] Apache Hadoop YARN Registry ........................ SUCCESS [ 1.004 s]
[INFO] Apache Hadoop YARN NodeManager ..................... SUCCESS [ 4.236 s]
[INFO] Apache Hadoop YARN Web Proxy ....................... SUCCESS [ 0.631 s]
[INFO] Apache Hadoop YARN ApplicationHistoryService ....... SUCCESS [ 36.280 s]
[INFO] Apache Hadoop YARN Timeline Service ................ SUCCESS [ 35.511 s]
[INFO] Apache Hadoop YARN ResourceManager ................. SUCCESS [ 9.729 s]
[INFO] Apache Hadoop YARN Server Tests .................... SUCCESS [ 1.010 s]
[INFO] Apache Hadoop YARN Client .......................... SUCCESS [ 2.120 s]
[INFO] Apache Hadoop YARN SharedCacheManager .............. SUCCESS [ 0.803 s]
[INFO] Apache Hadoop YARN Timeline Plugin Storage ......... SUCCESS [ 0.979 s]
[INFO] Apache Hadoop YARN Router .......................... SUCCESS [ 1.107 s]
[INFO] Apache Hadoop YARN TimelineService HBase Backend ... SUCCESS [08:02 min]
[INFO] Apache Hadoop YARN Timeline Service HBase tests .... SUCCESS [04:13 min]
[INFO] Apache Hadoop YARN Applications .................... SUCCESS [ 0.032 s]
[INFO] Apache Hadoop YARN DistributedShell ................ SUCCESS [ 0.853 s]
[INFO] Apache Hadoop YARN Unmanaged Am Launcher ........... SUCCESS [ 0.385 s]
[INFO] Apache Hadoop YARN Site ............................ SUCCESS [ 0.030 s]
[INFO] Apache Hadoop YARN UI .............................. SUCCESS [ 0.033 s]
[INFO] Apache Hadoop YARN Project ......................... SUCCESS [ 8.972 s]
[INFO] Apache Hadoop MapReduce Client ..................... SUCCESS [ 0.117 s]
[INFO] Apache Hadoop MapReduce Core ....................... SUCCESS [ 4.210 s]
[INFO] Apache Hadoop MapReduce Common ..................... SUCCESS [ 2.598 s]
[INFO] Apache Hadoop MapReduce Shuffle .................... SUCCESS [ 0.686 s]
[INFO] Apache Hadoop MapReduce App ........................ SUCCESS [ 2.710 s]
[INFO] Apache Hadoop MapReduce HistoryServer .............. SUCCESS [ 1.744 s]
[INFO] Apache Hadoop MapReduce JobClient .................. SUCCESS [ 3.607 s]
[INFO] Apache Hadoop MapReduce HistoryServer Plugins ...... SUCCESS [ 0.472 s]
[INFO] Apache Hadoop MapReduce Examples ................... SUCCESS [ 1.160 s]
[INFO] Apache Hadoop MapReduce ............................ SUCCESS [ 3.514 s]
[INFO] Apache Hadoop MapReduce Streaming .................. SUCCESS [ 21.513 s]
[INFO] Apache Hadoop Distributed Copy ..................... SUCCESS [ 3.392 s]
[INFO] Apache Hadoop Archives ............................. SUCCESS [ 0.346 s]
[INFO] Apache Hadoop Archive Logs ......................... SUCCESS [ 0.460 s]
[INFO] Apache Hadoop Rumen ................................ SUCCESS [ 1.026 s]
[INFO] Apache Hadoop Gridmix .............................. SUCCESS [ 0.892 s]
[INFO] Apache Hadoop Data Join ............................ SUCCESS [ 0.389 s]
[INFO] Apache Hadoop Ant Tasks ............................ SUCCESS [ 0.156 s]
[INFO] Apache Hadoop Extras ............................... SUCCESS [ 0.510 s]
[INFO] Apache Hadoop Pipes ................................ SUCCESS [ 0.029 s]
[INFO] Apache Hadoop OpenStack support .................... SUCCESS [ 0.643 s]
[INFO] Apache Hadoop Amazon Web Services support .......... SUCCESS [19:13 min]
[INFO] Apache Hadoop Azure support ........................ SUCCESS [ 27.780 s]
[INFO] Apache Hadoop Client ............................... SUCCESS [ 6.349 s]
[INFO] Apache Hadoop Mini-Cluster ......................... SUCCESS [ 0.860 s]
[INFO] Apache Hadoop Scheduler Load Simulator ............. SUCCESS [ 1.738 s]
[INFO] Apache Hadoop Resource Estimator Service ........... SUCCESS [ 16.888 s]
[INFO] Apache Hadoop Azure Data Lake support .............. SUCCESS [ 50.514 s]
[INFO] Apache Hadoop Tools Dist ........................... SUCCESS [ 12.594 s]
[INFO] Apache Hadoop Tools ................................ SUCCESS [ 0.025 s]
[INFO] Apache Hadoop Distribution ......................... SUCCESS [ 54.300 s]
[INFO] Apache Hadoop Cloud Storage ........................ SUCCESS [ 0.591 s]
[INFO] Apache Hadoop Cloud Storage Project ................ SUCCESS [ 0.024 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:38 h
[INFO] Finished at: 2017-12-06T00:01:59+08:00
[INFO] Final Memory: 196M/876M
[INFO] ------------------------------------------------------------------------
这些输出信息就是我们构建的组件，说白了就是我们的hadoop使用到的模块。
通过上面的模块，我们可以一一解读我们阅读源码的位置和顺序
通过上面的输出，我们知道hadoop的组件主要有：
- Main
- Build Tools
- Project POM
- Annotations
- Assemblies
- Project Dist POM
- Maven Plugins
- MiniKDC
- Auth
- Auth Examples
- Common
- NFS
- KMS
- Common Project
- HDFS Client
- HDFS
- HDFS Native Client
- HttpFS
- HDFS BookKeeper Journal
- HDFS-NFS
- HDFS Project
- YARN
- YARN API
- YARN Common
- YARN Server
- YARN Server Common
- YARN Registry
- YARN NodeManager
- YARN Web Proxy
- YARN ApplicationHistoryService
- YARN Timeline Service
- YARN ResourceManager
- YARN Server Tests
- YARN Client
- YARN SharedCacheManager
- YARN Timeline Plugin Storage
- YARN Router
- YARN TimelineService HBase Backend
- YARN Timeline Service HBase tests
- YARN Applications
- YARN DistributedShell
- YARN Unmanaged Am Launcher
- YARN Site
- YARN UI
- YARN Project
- MapReduce Client
- MapReduce Core
- MapReduce Common
- MapReduce Shuffle
- MapReduce App
- MapReduce HistoryServer
- MapReduce JobClient
- MapReduce HistoryServer Plugins
- MapReduce Examples
- MapReduce
- MapReduce Streaming
- Distributed Copy
- Archives
- Archive Logs
- Rumen
- Gridmix
- Data Join
- Ant Tasks
- Extras
- Pipes
- OpenStack support
- Amazon Web Services support
- Azure support
- Client
- Mini-Cluster
- Scheduler Load Simulator
- Resource Estimator Service
- Azure Data Lake support
- Tools Dist
- Tools
- Distribution
- Cloud Storage
- Cloud Storage Project
在后面的文章我们按照这个顺序来解读我们的hadoop源代码。
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