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linux_HDFS节点缺失问题解析_集群缺少datanode

作者：Guff_9hys | 2024-08-19 13:41:46

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集群缺少datanode

一、背景介绍：现在虚拟机node1，node2，node3

使用：start-dfs.sh  一键启动HDFS集群

二、现象描述：

1.查看node1的进程启动情况

  1. [root@node1 ~]#start-dfs.sh
  2. [root@node1 ~]# jps
  3. 4145 Jps
  4. 2102 NameNode
  5. 2247 DataNode
  6. [root@node1 ~]#

2.查看node2的进程启动情况

  1. [root@node2 logs]# jps
  2. 3828 Jps
  3. 1800 DataNode
  4. [root@node2 logs]#

3.查看node3的进程启动情况

  1. [root@node3 ~]# jps
  2. 3428 Jps
  3. [root@node3 ~]#

发现问题：node3的datanode从节点没有启动

三、问题分析：

1.一键启动配置是否出现问题

       一般系统配置不会出错，第一次启动成功就说明是好的。

2.异常：从节点自动关闭或掉线

  2.1.通过查看node3日志去排查问题

  日志路径：/export/server/hadoop-3.3.0/logs/索要查看的日志文件

  1. [root@node3 ~]# cd /export/server/hadoop-3.3.0/logs
  2. [root@node3 logs]# cat hadoop-root-datanode-node3.itcast.cn.log
  3. 2023-06-06 07:24:31,896 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: RECEIVED SIGNAL 1: SIGHUP
  4. 2023-06-06 07:24:31,907 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: RECEIVED SIGNAL 15: SIGTERM
  5. 2023-06-06 07:24:31,914 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: 
  6. /************************************************************
  7. SHUTDOWN_MSG: Shutting down DataNode at node3.itcast.cn/192.168.88.153
  8. ************************************************************/
  9. [root@node3 logs]#

   注意：在查看日志的时候，上述方式会显示从第一天启动开始到现在的日志，这是一个很庞大的数据过程。

            所以通过如下方式去查看node3的日志：

           ①vim 进入到日志文件

           ②命令模式：通过/关键时间定位到固定日志查看

  1. [root@node3 logs]# ll
  2. total 7020
  3. -rw-r--r-- 1 root root 6950235 Jun  6 11:31 hadoop-root-datanode-node3.itcast.cn.log
  4. -rw-r--r-- 1 root root     692 Jun  6 11:26 hadoop-root-datanode-node3.itcast.cn.out
  5. -rw-r--r-- 1 root root     692 Jun  5 21:33 hadoop-root-datanode-node3.itcast.cn.out.1
  6. -rw-r--r-- 1 root root     692 Jun  5 18:15 hadoop-root-datanode-node3.itcast.cn.out.2
  7. -rw-r--r-- 1 root root     692 Jun  5 07:15 hadoop-root-datanode-node3.itcast.cn.out.3
  8. -rw-r--r-- 1 root root     692 Jun  4 22:44 hadoop-root-datanode-node3.itcast.cn.out.4
  9. -rw-r--r-- 1 root root  205640 Jun  5 19:33 hadoop-root-nodemanager-node3.itcast.cn.log
  10. -rw-r--r-- 1 root root    2201 Jun  5 18:19 hadoop-root-nodemanager-node3.itcast.cn.out
  11. -rw-r--r-- 1 root root    2201 Jun  5 07:23 hadoop-root-nodemanager-node3.itcast.cn.out.1
  12. -rw-r--r-- 1 root root       0 Jun  4 22:44 SecurityAuth-root.audit
  13. drwxr-xr-x 2 root root       6 Jun  5 07:40 userlogs
  14. [root@node3 logs]# vim hadoop-root-datanode-node3.itcast.cn.log
  15. 2023-06-05 21:33:37,872 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Adding block pool BP-389489230-192.168.88.151-1685888665811
  16. 2023-06-05 21:33:37,873 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Scanning block pool BP-389489230-192.168.88.151-1685888665811 on volume /export/data/hadoop-3.3.0/dfs/data...
  17. 2023-06-05 21:33:37,913 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Time taken to scan block pool BP-389489230-192.168.88.151-1685888665811 on /export/data/hadoop-3.3.0/dfs/data: 41ms
  18. 2023-06-05 21:33:37,913 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Total time to scan all replicas for block pool BP-389489230-192.168.88.151-1685888665811: 42ms
  19. 2023-06-05 21:33:37,915 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Adding replicas to map for block pool BP-389489230-192.168.88.151-1685888665811 on volume /export/data/hadoop-3.3.0/dfs/data...
  20. 2023-06-05 21:33:37,915 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice: Replica Cache file: /export/data/hadoop-3.3.0/dfs/data/current/BP-389489230-192.168.88.151-1685888665811/current/replicas doesn't exist 
  21. 2023-06-05 21:33:37,930 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Time to add replicas to map for block pool BP-389489230-192.168.88.151-1685888665811 on volume /export/data/hadoop-3.3.0/dfs/data: 16ms
  22. 2023-06-05 21:33:37,930 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Total time to add all replicas to map for block pool BP-389489230-192.168.88.151-1685888665811: 16ms
  23. 2023-06-05 21:33:37,931 INFO org.apache.hadoop.hdfs.server.datanode.checker.ThrottledAsyncChecker: Scheduling a check for /export/data/hadoop-3.3.0/dfs/data
  24. 2023-06-05 21:33:37,941 INFO org.apache.hadoop.hdfs.server.datanode.checker.DatasetVolumeChecker: Scheduled health check for volume /export/data/hadoop-3.3.0/dfs/data
  25. 2023-06-05 21:33:37,952 INFO org.apache.hadoop.hdfs.server.datanode.VolumeScanner: VolumeScanner(/export/data/hadoop-3.3.0/dfs/data, DS-151efa3b-8d41-483c-91d3-24c93d2871a2): no suitable block pools found to scan.  Waiting 1732279321 ms.
  26. 2023-06-05 21:33:37,955 WARN org.apache.hadoop.hdfs.server.datanode.DirectoryScanner: dfs.datanode.directoryscan.throttle.limit.ms.per.sec set to value above 1000 ms/sec. Assuming default value of -1
  27. 2023-06-05 21:33:37,955 INFO org.apache.hadoop.hdfs.server.datanode.DirectoryScanner: Periodic Directory Tree Verification scan starting in 7915082ms with interval of 21600000ms and throttle limit of -1ms/s
  28. 2023-06-05 21:33:37,961 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Block pool BP-389489230-192.168.88.151-1685888665811 (Datanode Uuid e7c67709-7680-4f33-81ed-50f6bbf48b46) service to node1/192.168.88.151:8020 beginning handshake with NN
  29. 2023-06-05 21:33:37,997 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Block pool BP-389489230-192.168.88.151-1685888665811 (Datanode Uuid e7c67709-7680-4f33-81ed-50f6bbf48b46) service to node1/192.168.88.151:8020 successfully registered with NN
  30. 2023-06-05 21:33:37,998 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: For namenode node1/192.168.88.151:8020 using BLOCKREPORT_INTERVAL of 21600000msecs CACHEREPORT_INTERVAL of 10000msecs Initial delay: 0msecs; heartBeatInterval=3000
  31. 2023-06-05 21:33:38,138 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Successfully sent block report 0x45e611d10c32cfb7,  containing 1 storage report(s), of which we sent 1. The reports had 4 total blocks and used 1 RPC(s). This took 5 msecs to generate and 83 msecs for RPC and NN processing. Got back one command: FinalizeCommand/5.
  32. 2023-06-05 21:33:38,138 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Got finalize command for block pool BP-389489230-192.168.88.151-1685888665811
  33. 2023-06-06 07:24:31,896 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: RECEIVED SIGNAL 1: SIGHUP
  34. 2023-06-06 07:24:31,907 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: RECEIVED SIGNAL 15: SIGTERM
  35. 2023-06-06 07:24:31,914 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: 
  36. /************************************************************
  37. SHUTDOWN_MSG: Shutting down DataNode at node3.itcast.cn/192.168.88.153
  38. ************************************************************/
  39. [root@node3 logs]# jps
  40. 3458 Jps
  41. [root@node3 logs]# cd /export/server/hadoop-3.3.0/sbin
  42. [root@node3 sbin]# ll
  43. total 108
  44. -rwxr-xr-x 1 root root 2756 Jun  4 21:10 distribute-exclude.sh
  45. drwxr-xr-x 4 root root   36 Jun  4 21:10 FederationStateStore
  46. -rwxr-xr-x 1 root root 1983 Jun  4 21:10 hadoop-daemon.sh
  47. -rwxr-xr-x 1 root root 2522 Jun  4 21:10 hadoop-daemons.sh
  48. -rwxr-xr-x 1 root root 1542 Jun  4 21:10 httpfs.sh
  49. -rwxr-xr-x 1 root root 1500 Jun  4 21:10 kms.sh
  50. -rwxr-xr-x 1 root root 1841 Jun  4 21:10 mr-jobhistory-daemon.sh
  51. -rwxr-xr-x 1 root root 2086 Jun  4 21:10 refresh-namenodes.sh
  52. -rwxr-xr-x 1 root root 1779 Jun  4 21:10 start-all.cmd
  53. -rwxr-xr-x 1 root root 2221 Jun  4 21:10 start-all.sh
  54. -rwxr-xr-x 1 root root 1880 Jun  4 21:10 start-balancer.sh
  55. -rwxr-xr-x 1 root root 1401 Jun  4 21:10 start-dfs.cmd
  56. -rwxr-xr-x 1 root root 5170 Jun  4 21:10 start-dfs.sh
  57. -rwxr-xr-x 1 root root 1793 Jun  4 21:10 start-secure-dns.sh
  58. -rwxr-xr-x 1 root root 1571 Jun  4 21:10 start-yarn.cmd
  59. -rwxr-xr-x 1 root root 3342 Jun  4 21:10 start-yarn.sh
  60. -rwxr-xr-x 1 root root 1770 Jun  4 21:10 stop-all.cmd
  61. -rwxr-xr-x 1 root root 2166 Jun  4 21:10 stop-all.sh
  62. -rwxr-xr-x 1 root root 1783 Jun  4 21:10 stop-balancer.sh
  63. -rwxr-xr-x 1 root root 1455 Jun  4 21:10 stop-dfs.cmd
  64. -rwxr-xr-x 1 root root 3898 Jun  4 21:10 stop-dfs.sh
  65. -rwxr-xr-x 1 root root 1756 Jun  4 21:10 stop-secure-dns.sh
  66. -rwxr-xr-x 1 root root 1642 Jun  4 21:10 stop-yarn.cmd
  67. -rwxr-xr-x 1 root root 3083 Jun  4 21:10 stop-yarn.sh
  68. -rwxr-xr-x 1 root root 1982 Jun  4 21:10 workers.sh
  69.         at java.io.FilterInputStream.read(FilterInputStream.java:133)
  70.         at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
  71.         at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
  72.         at java.io.FilterInputStream.read(FilterInputStream.java:83)
  73.         at java.io.FilterInputStream.read(FilterInputStream.java:83)
  74.         at org.apache.hadoop.ipc.Client$Connection$PingInputStream.read(Client.java:562)
  75.         at java.io.DataInputStream.readInt(DataInputStream.java:387)
  76.         at org.apache.hadoop.ipc.Client$IpcStreams.readResponse(Client.java:1881)
  77.         at org.apache.hadoop.ipc.Client$Connection.receiveRpcResponse(Client.java:1191)
  78.         at org.apache.hadoop.ipc.Client$Connection.run(Client.java:1087)
  79. 2023-06-05 00:03:05,799 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: RECEIVED SIGNAL 15: SIGTERM
  80. 2023-06-05 00:03:05,805 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
  81. /************************************************************
  82. SHUTDOWN_MSG: Shutting down DataNode at node3.itcast.cn/192.168.88.153
  83. ************************************************************/
  84. 2023-06-05 07:15:43,274 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
  85. /************************************************************
  86. STARTUP_MSG: Starting DataNode
  87. STARTUP_MSG:   host = node3.itcast.cn/192.168.88.153
  88. STARTUP_MSG:   args = []
  89. STARTUP_MSG:   version = 3.3.0
  90. @                                                                                                                                                                                                                                                                                                                                                                                @                                                                                                                                                                                         
  91. /2023-06-05

    2.1.1.报错信息解析

报错信息：2023-06-06 07:24:31,896 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: RECEIVED SIGNAL 1: SIGHUP
①apache.hadoop.hdfs.server.datanode.DataNode:接收到的信号
②SIGHUP签约雇用，签约参加
③apache.hadoop软件框架

报错信息：2023-06-06 07:24:31,907 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: RECEIVED SIGNAL 15: SIGTERM
①hdfs.server.datanode.DataNode: 配置数据存放的路径
②RECEIVED SIGNAL 15: SIGTERM=》接收信号15:sigterm
③15: SIGTERM=》signal 15含意是使用不带参数的kill命令时终止进程,

  2.1.2.解决：

初步判断，由于文件数据块的原因造成datanode失联，手动在node3执行如下命令，重新启动node3上面的datanode节点：
hadoop dfsadmin -refreshNode

  2.2.通过HDFS浏览器网页去查看

step1:

step2: 

 step3:解决：

手动在node3执行如下命令，重新启动node3上面的datanode节点：
hadoop dfsadmin -refreshNode

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