1、日志格式分析
首先分析 Hadoop 的日志格式, 日志是一行一条, 日志格式可以依次描述为:日期、时间、级别、相关类和提示信息。如下所示:

  1. -03-06 15:23:48,132 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
  2. -03-06 15:23:48,288 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties
  3. -03-06 15:23:48,298 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered.
  4. -03-06 15:23:48,299 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).
  5. -03-06 15:23:48,299 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system started
  6. -03-06 15:23:48,423 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered.
  7. -03-06 15:23:48,427 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists!
  8. -03-06 15:23:53,094 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Registered FSDatasetStatusMBean
  9. -03-06 15:23:53,102 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Opened data transfer server at 50010
  10. -03-06 15:23:53,105 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Balancing bandwith is 1048576 bytes/s
  11. -03-06 15:23:58,189 INFO org.mortbay.log: Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog
  12. -03-06 15:23:58,331 INFO org.apache.hadoop.http.HttpServer: Added global filtersafety (class=org.apache.hadoop.http.HttpServer$QuotingInputFilter)
  13. -03-06 15:23:58,346 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: dfs.webhdfs.enabled = false
  14. -03-06 15:23:58,346 INFO org.apache.hadoop.http.HttpServer: Port returned by webServer.getConnectors()[0].getLocalPort() before open() is -1. Opening the listener on 50075
  15. -03-06 15:23:58,346 INFO org.apache.hadoop.http.HttpServer: listener.getLocalPort() returned 50075 webServer.getConnectors()[0].getLocalPort() returned 50075
  16. -03-06 15:23:58,346 INFO org.apache.hadoop.http.HttpServer: Jetty bound to port 50075
  17. -03-06 15:23:58,347 INFO org.mortbay.log: jetty-6.1.26
  18. -03-06 15:23:58,719 INFO org.mortbay.log: Started SelectChannelConnector@0.0.0.0:50075
  19. -03-06 15:23:58,724 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source jvm registered.
  20. -03-06 15:23:58,726 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source DataNode registered.
  21. -03-06 15:24:03,904 INFO org.apache.hadoop.ipc.Server: Starting SocketReader
  22. -03-06 15:24:03,909 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source RpcDetailedActivityForPort50020 registered.
  23. -03-06 15:24:03,909 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source RpcActivityForPort50020 registered.
  24. -03-06 15:24:03,910 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: dnRegistration = DatanodeRegistration(localhost.localdomain:50010, storageID=DS-2039125727-127.0.1.1-50010-1362105928671, infoPort=50075, ipcPort=50020)
  25. -03-06 15:24:03,922 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Finished generating blocks being written report for 1 volumes in 0 seconds
  26. -03-06 15:24:03,926 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Starting asynchronous block report scan
  27. -03-06 15:24:03,926 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(192.168.11.157:50010, storageID=DS-2039125727-127.0.1.1-50010-1362105928671, infoPort=50075, ipcPort=50020)In DataNode.run, data = FSDataset{dirpath='/home/hadoop/hadoop-datastore/dfs/data/current'}
  28. -03-06 15:24:03,932 INFO org.apache.hadoop.ipc.Server: IPC Server listener on 50020: starting
  29. -03-06 15:24:03,932 INFO org.apache.hadoop.ipc.Server: IPC Server Responder: starting
  30. -03-06 15:24:03,934 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Finished asynchronous block report scan in 8ms
  31. -03-06 15:24:03,934 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 50020: starting
  32. -03-06 15:24:03,934 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on 50020: starting
  33. -03-06 15:24:03,950 INFO org.apache.hadoop.ipc.Server: IPC Server handler 2 on 50020: starting
  34. -03-06 15:24:03,951 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: using BLOCKREPORT_INTERVAL of 3600000msec Initial delay: 0msec
  35. -03-06 15:24:03,956 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Reconciled asynchronous block report against current state in 1 ms
  36. -03-06 15:24:03,961 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: BlockReport of 12 blocks took 1 msec to generate and 5 msecs for RPC and NN processing
  37. -03-06 15:24:03,962 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Starting Periodic block scanner.
  38. -03-06 15:24:03,962 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Generated rough (lockless) block report in 0 ms
  39. -03-06 15:24:03,962 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Reconciled asynchronous block report against current state in 0 ms
  40. -03-06 15:24:04,004 INFO org.apache.hadoop.util.NativeCodeLoader: Loaded the native-hadoop library
  41. -03-06 15:24:04,047 INFO org.apache.hadoop.hdfs.server.datanode.DataBlockScanner: Verification succeeded for blk_3810479607061332370_1201
  42. -03-06 15:24:34,274 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_8724520321365706382_1202 src: /192.168.11.157:42695 dest: /192.168.11.157:50010
  43. -03-06 15:24:34,282 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42695, dest: /192.168.11.157:50010, bytes: 4, op: HDFS_WRITE, cliID: DFSClient_NONMAPREDUCE_-328627796_1, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_8724520321365706382_1202, duration: 1868644
  44. -03-06 15:24:34,282 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_8724520321365706382_1202 terminating
  45. -03-06 15:24:36,967 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Scheduling block blk_3810479607061332370_1201 file /home/hadoop/hadoop-datastore/dfs/data/current/blk_3810479607061332370 for deletion
  46. -03-06 15:24:36,969 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Deleted block blk_3810479607061332370_1201 at file /home/hadoop/hadoop-datastore/dfs/data/current/blk_3810479607061332370
  47. -03-06 15:24:42,130 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_-7687594967083109639_1203 src: /192.168.11.157:42698 dest: /192.168.11.157:50010
  48. -03-06 15:24:42,135 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42698, dest: /192.168.11.157:50010, bytes: 3, op: HDFS_WRITE, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_-7687594967083109639_1203, duration: 1823671
  49. -03-06 15:24:42,135 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_-7687594967083109639_1203 terminating
  50. -03-06 15:24:42,159 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_8851175106166281673_1204 src: /192.168.11.157:42699 dest: /192.168.11.157:50010
  51. -03-06 15:24:42,162 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42699, dest: /192.168.11.157:50010, bytes: 38, op: HDFS_WRITE, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_8851175106166281673_1204, duration: 496431
  52. -03-06 15:24:42,163 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_8851175106166281673_1204 terminating
  53. -03-06 15:24:42,177 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42700, bytes: 42, op: HDFS_READ, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_8851175106166281673_1204, duration: 598594
  54. -03-06 15:24:42,401 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_-3564732110216498100_1206 src: /192.168.11.157:42701 dest: /192.168.11.157:50010
  55. -03-06 15:24:42,402 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42701, dest: /192.168.11.157:50010, bytes: 109, op: HDFS_WRITE, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_-3564732110216498100_1206, duration: 465158
  56. -03-06 15:24:42,404 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_-3564732110216498100_1206 terminating
  57. -03-06 15:24:42,593 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_2602280850343619161_1208 src: /192.168.11.157:42702 dest: /192.168.11.157:50010
  58. -03-06 15:24:42,594 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42702, dest: /192.168.11.157:50010, bytes: 111, op: HDFS_WRITE, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2602280850343619161_1208, duration: 457596
  59. -03-06 15:24:42,595 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_2602280850343619161_1208 terminating
  60. -03-06 15:24:42,620 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_-8499292753361571333_1208 src: /192.168.11.157:42703 dest: /192.168.11.157:50010
  61. -03-06 15:24:42,673 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_2168216133004853837_1209 src: /192.168.11.157:42704 dest: /192.168.11.157:50010
  62. -03-06 15:24:42,676 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42704, dest: /192.168.11.157:50010, bytes: 848, op: HDFS_WRITE, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 705024
  63. -03-06 15:24:42,676 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_2168216133004853837_1209 terminating
  64. -03-06 15:24:42,691 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42705, bytes: 340, op: HDFS_READ, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 512, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 913742
  65. -03-06 15:24:42,709 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42706, bytes: 856, op: HDFS_READ, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 462507
  66. -03-06 15:24:42,724 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42707, bytes: 340, op: HDFS_READ, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 512, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 364763
  67. -03-06 15:24:42,726 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42708, bytes: 856, op: HDFS_READ, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 432228
  68. -03-06 15:24:42,739 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42703, dest: /192.168.11.157:50010, bytes: 421, op: HDFS_WRITE, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_-8499292753361571333_1208, duration: 116933097
  69. -03-06 15:24:42,739 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_-8499292753361571333_1208 terminating
  70. -03-06 15:24:42,759 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_-6232731177153285690_1209 src: /192.168.11.157:42709 dest: /192.168.11.157:50010
  71. -03-06 15:24:42,764 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42709, dest: /192.168.11.157:50010, bytes: 134, op: HDFS_WRITE, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_-6232731177153285690_1209, duration: 2742705
  72. -03-06 15:24:42,765 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_-6232731177153285690_1209 terminating
  73. -03-06 15:24:42,803 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_6878738047819289992_1210 src: /192.168.11.157:42710 dest: /192.168.11.157:50010
  74. -03-06 15:24:42,806 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:42710, dest: /192.168.11.157:50010, bytes: 727, op: HDFS_WRITE, cliID: DFSClient_hb_m_localhost.localdomain,60000,1362554661390_792638511_9, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_6878738047819289992_1210, duration: 1048999
  75. -03-06 15:24:42,807 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: PacketResponder 0 for block blk_6878738047819289992_1210 terminating
  76. -03-06 15:24:49,347 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42716, bytes: 340, op: HDFS_READ, cliID: DFSClient_hb_rs_localhost.localdomain,60020,1362554662758_1605864397_26, offset: 512, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 317106
  77. -03-06 15:24:49,359 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42717, bytes: 856, op: HDFS_READ, cliID: DFSClient_hb_rs_localhost.localdomain,60020,1362554662758_1605864397_26, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 460452
  78. -03-06 15:24:49,455 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42718, bytes: 516, op: HDFS_READ, cliID: DFSClient_hb_rs_localhost.localdomain,60020,1362554662758_1605864397_26, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 264641
  79. -03-06 15:24:49,456 INFO org.apache.hadoop.hdfs.server.datanode.DataNode.clienttrace: src: /192.168.11.157:50010, dest: /192.168.11.157:42719, bytes: 516, op: HDFS_READ, cliID: DFSClient_hb_rs_localhost.localdomain,60020,1362554662758_1605864397_26, offset: 0, srvID: DS-2039125727-127.0.1.1-50010-1362105928671, blockid: blk_2168216133004853837_1209, duration: 224282
  80. -03-06 15:24:50,615 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_-55581707144444311_1211 src: /192.168.11.157:42722 dest: /192.168.11.157:50010
  81. -03-06 15:38:17,696 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
  82. );
  83. );
  84. );
  85. );
  86. );
  87. );
  88. ) + res.getString(6)
  89. );
  90. , sql.length());
  91. , sql.length());
  92. -03-06      ["15:23:48","132"]      INFO    org.apache.hadoop.hdfs.server.datanode.DataNode:        STARTUP_MSG:    NULL
  93. -03-06      ["15:23:48","288"]      INFO    org.apache.hadoop.metrics2.impl.MetricsConfig:  loaded  properties      from
  94. -03-06      ["15:23:48","298"]      INFO    org.apache.hadoop.metrics2.impl.MetricsSourceAdapter:   MBean   for     source
  95. -03-06      ["15:23:48","299"]      INFO    org.apache.hadoop.metrics2.impl.MetricsSystemImpl:      Scheduled       snapshot period
  96. -03-06      ["15:23:48","299"]      INFO    org.apache.hadoop.metrics2.impl.MetricsSystemImpl:      DataNode        metrics  system
  97. -03-06      ["15:23:48","423"]      INFO    org.apache.hadoop.metrics2.impl.MetricsSourceAdapter:   MBean   for     source
  98. -03-06      ["15:23:48","427"]      WARN    org.apache.hadoop.metrics2.impl.MetricsSystemImpl:      Source  name    u

2）：mysql中的数据（部分数据）：

  1. | 2013-03-06 | 15:23:48 | INFO | org.apache.hadoop.hdfs.server.datanode.DataNode:             | STARTUP_MSG:null                                                                                                |
  2. | 2013-03-06 | 15:23:48 | INFO | org.apache.hadoop.metrics2.impl.MetricsConfig:               | loadedpropertiesfrom                                                                                            |
  3. | 2013-03-06 | 15:23:48 | INFO | org.apache.hadoop.metrics2.impl.MetricsSourceAdapter:        | MBeanforsource                                                                                                  |
  4. | 2013-03-06 | 15:23:48 | INFO | org.apache.hadoop.metrics2.impl.MetricsSystemImpl:           | Scheduledsnapshotperiod                                                                                         |
  5. | 2013-03-06 | 15:23:48 | INFO | org.apache.hadoop.metrics2.impl.MetricsSystemImpl:           | DataNodemetricssystem                                                                                           |
  6. | 2013-03-06 | 15:23:48 | INFO | org.apache.hadoop.metrics2.impl.MetricsSourceAdapter:        | MBeanforsource                                                                                                  |
  7. | 2013-03-06 | 15:23:53 | INFO | org.apache.hadoop.hdfs.server.datanode.DataNode:             | RegisteredFSDatasetS  

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