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执行bin/hdfs haadmin -transitionToActive nn1时出现,Automatic failover is enabled for NameNode at bigdata-pro02.kfk.com/192.168.80.152:8020 Refusing to manually manage HA state的解决办法(图文详解)

 

 

  不多说,直接上干货!

 

 

  首先,

 

 

 

 

 

 

 

 

 

 

 

 

 

    那么,你也许,第一感觉,是想到的是

全网最详细的Hadoop HA集群启动后,两个namenode都是standby的解决办法(图文详解)

 

 

 

    这里,nn1,不多赘述了。很简单,大家自行去看。

 

    总的是nn,我的bigdata-pro01.kfk.com是nn1,我的bigdata-pro02.kfk.com是nn2。

 

 

 

     是因为,在配置文件上,如下:

 

 

 

 

    

[kfk@bigdata-pro02 hadoop-2.6.0]$ bin/hdfs haadmin -transitionToActive nn1
Automatic failover is enabled for NameNode at bigdata-pro02.kfk.com/192.168.80.152:8020
Refusing to manually manage HA state, since it may cause
a split-brain scenario or other incorrect state.
If you are very sure you know what you are doing, please 
specify the forcemanual flag.
[kfk@bigdata-pro02 hadoop-2.6.0]$ 

 

 

 

 

 

 

     

 

解决办法:

    是因为开启了zkfc 自动选active的namenode   不能手动切换了 zkfc会自动选择namenode节点作为active的。

 

 

 

 

 

 

  所以,

启动并测试

   

  1、先停止掉Hadoop和zookeeper的进程。

 

  2、启动zookeeper进程。

 

  3、开启zkfc进程

[kfk@bigdata-pro01 hadoop-2.6.0]$ pwd
/opt/modules/hadoop-2.6.0
[kfk@bigdata-pro01 hadoop-2.6.0]$ sbin/hadoop-daemon.sh start zkfc 
starting zkfc, logging to /opt/modules/hadoop-2.6.0/logs/hadoop-kfk-zkfc-bigdata-pro01.kfk.com.out

 

 

 

  4、进入Hadoop的安装目录下面的sbin目录中,找到start-dfs.sh命令可以启动NameNode,当然这里需要你在配置了NameNode主节点的Hadoop节点上面来执行他。

     或者,直接sbin/start-all.sh

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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[kfk@bigdata-pro02 hadoop-2.6.0]$ bin/hdfs -help
Usage: hdfs [--config confdir] COMMAND
       where COMMAND is one of:
  dfs                  run a filesystem command on the file systems supported in Hadoop.
  namenode -format     format the DFS filesystem
  secondarynamenode    run the DFS secondary namenode
  namenode             run the DFS namenode
  journalnode          run the DFS journalnode
  zkfc                 run the ZK Failover Controller daemon
  datanode             run a DFS datanode
  dfsadmin             run a DFS admin client
  haadmin              run a DFS HA admin client
  fsck                 run a DFS filesystem checking utility
  balancer             run a cluster balancing utility
  jmxget               get JMX exported values from NameNode or DataNode.
  mover                run a utility to move block replicas across
                       storage types
  oiv                  apply the offline fsimage viewer to an fsimage
  oiv_legacy           apply the offline fsimage viewer to an legacy fsimage
  oev                  apply the offline edits viewer to an edits file
  fetchdt              fetch a delegation token from the NameNode
  getconf              get config values from configuration
  groups               get the groups which users belong to
  snapshotDiff         diff two snapshots of a directory or diff the
                       current directory contents with a snapshot
  lsSnapshottableDir   list all snapshottable dirs owned by the current user
                        Use -help to see options
  portmap              run a portmap service
  nfs3                 run an NFS version 3 gateway
  cacheadmin           configure the HDFS cache
  crypto               configure HDFS encryption zones
  storagepolicies      get all the existing block storage policies
  version              print the version

Most commands print help when invoked w/o parameters.
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[kfk@bigdata-pro02 hadoop-2.6.0]$ 
[kfk@bigdata-pro02 hadoop-2.6.0]$ bin/hdfs haadmin -help
Usage: DFSHAAdmin [-ns <nameserviceId>]
    [-transitionToActive <serviceId> [--forceactive]]
    [-transitionToStandby <serviceId>]
    [-failover [--forcefence] [--forceactive] <serviceId> <serviceId>]
    [-getServiceState <serviceId>]
    [-checkHealth <serviceId>]
    [-help <command>]

Generic options supported are
-conf <configuration file>     specify an application configuration file
-D <property=value>            use value for given property
-fs <local|namenode:port>      specify a namenode
-jt <local|resourcemanager:port>    specify a ResourceManager
-files <comma separated list of files>    specify comma separated files to be copied to the map reduce cluster
-libjars <comma separated list of jars>    specify comma separated jar files to include in the classpath.
-archives <comma separated list of archives>    specify comma separated archives to be unarchived on the compute machines.

The general command line syntax is
bin/hadoop command [genericOptions] [commandOptions]

[kfk@bigdata-pro02 hadoop-2.6.0]$ 
复制代码

 

     注意,其实自带的命令里,都提供了,若两者都是standby状态怎么执行。若两者都是active状态怎么执行。这里,不多赘述。

 

 

 

 

 

  如果,还是没解决的话,则

bin/hdfs haadmin -transitionToActive nn1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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posted @ 2018-06-16 17:17  大数据和AI躺过的坑  阅读(...)  评论(... 编辑 收藏