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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

     

     

     

     

     

    复制代码
    [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.
    复制代码

    复制代码
    [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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  • 原文地址:https://www.cnblogs.com/zlslch/p/9190906.html
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