得到“错误：无法从ZooKeeper获取主地址; znode数据== null“当使用Hbase shell时 [英] get "ERROR: Can't get master address from ZooKeeper; znode data == null" when using Hbase shell

问题描述

  $ ./bin/start- hbase.sh 
 
 $ ./bin/hbase shell 
 
 2.0.0-p353：001> list 
  

然后我得到了这个：

 错误：无法从ZooKeeper获取主地址; znode data == null 
  

为什么我得到这个错误？另一个问题：
是否需要运行 ./ sbin / start-dfs.sh 和 ./ sbin / start-yarn.sh 在运行base之前？

另外， ./ sbin / start-dfs.sh 和 ./ sbin / start-yarn.sh for？

这里是我的一些conf doc：

hbase-sites.xml

 < configuration> 
<属性> 
<名称> hbase.rootdir< /名称> 
<值> hdfs：//127.0.0.1：9000 / hbase< /值> 
< / property> 
<属性> 
<名称> hbase.cluster.distributed< /名称> 
<值> true< /值> 
< / property> 
 
<属性> 
<名称> hbase.tmp.dir< / name> 
< value> / Users / apple / Documents / tools / hbase-tmpdir / hbase-data< / value> 
< / property> 
<属性> 
<名称> hbase.zookeeper.quorum< / name> 
<值>本地主机< /值> 
< / property> 
<属性> 
<名称> hbase.zookeeper.property.dataDir< / name> 
< value> / Users / apple / Documents / tools / hbase-zookeeper / zookeeper< / value> 
< / property> 
< / configuration> 
  

core-sites.xml

 <结构> 
 
<属性> 
<名称> fs.defaultFS< / name> 
< value> hdfs：// localhost：9000< / value> 
< description>默认文件系统的名称。< / description> 
< / property> 
 
<属性> 
< name> hadoop.tmp.dir< / name> 
< value> / Users / micmiu / tmp / hadoop< / value> 
< description>其他临时目录的基础。< / description> 
< / property> 
 
<属性> 
< name> io.native.lib.available< / name> 
<值> false< /值> 
< / property> 
 
< / configuration> 
  

yarn-sites.xml

 <结构> 
 
<属性> 
< name> yarn.nodemanager.aux-services< / name> 
< value> mapreduce_shuffle< /值> 
< / property> 
 
<属性> 
< name> yarn.nodemanager.aux-services.mapreduce.shuffle.class< / name> 
< value> org.apache.hadoop.mapred.ShuffleHandler< / value> 
< / property> 
 
< / configuration> 
  

解决方案

如果您只想运行HBase而不进入Zookeeper管理独立的HBase，然后从 hbase-site.xml 中删除​​所有属性块，但名为 hbase.rootdir 。

现在运行 /bin/start-hbase.sh 。 HBase自带Zookeeper，当您运行 /bin/start-hbase.sh 时就会启动它，如果您第一次尝试解决问题就足够了。稍后，您可以为Zookeeper分配模式配置。

您只需运行 /sbin/start-dfs.sh 用于运行HBase，因为 hbase.rootdir 的值设置为 hdfs：//127.0.0.1：9000 / hbase 放入 hbase-site.xml 中。如果使用 file：/// some_location_on_local_filesystem 将其更改为本地文件系统的某个位置，则甚至不需要运行 / sbin / start-dfs.sh 。

hdfs：//127.0.0.1：9000 / hbase 表示这是HDFS上的一个地方， /sbin/start-dfs.sh 启动namenode和datanode，它提供底层API来访问HDFS文件系统。要了解纱线，请查看 http://hadoop.apache.org/docs/r2.3.0/hadoop-yarn/hadoop-yarn-site/YARN.html 。

I installed Hadoop2.2.0 and Hbase0.98.0 and here is what I do :

$ ./bin/start-hbase.sh 

$ ./bin/hbase shell

2.0.0-p353 :001 > list

then I got this:

ERROR: Can't get master address from ZooKeeper; znode data == null

Why am I getting this error ? Another question: do I need to run ./sbin/start-dfs.sh and ./sbin/start-yarn.sh before I run base ?

Also, what are used ./sbin/start-dfs.sh and ./sbin/start-yarn.sh for ?

Here is some of my conf doc :

hbase-sites.xml

<configuration>
    <property>
        <name>hbase.rootdir</name>
        <value>hdfs://127.0.0.1:9000/hbase</value>
    </property>
    <property>
        <name>hbase.cluster.distributed</name>
        <value>true</value>
    </property>

    <property>
        <name>hbase.tmp.dir</name>
        <value>/Users/apple/Documents/tools/hbase-tmpdir/hbase-data</value>
    </property>
    <property>
        <name>hbase.zookeeper.quorum</name>
        <value>localhost</value>
    </property>
    <property>
        <name>hbase.zookeeper.property.dataDir</name>
        <value>/Users/apple/Documents/tools/hbase-zookeeper/zookeeper</value>
    </property>
</configuration>

core-sites.xml

<configuration>

  <property>
      <name>fs.defaultFS</name>
      <value>hdfs://localhost:9000</value>
      <description>The name of the default file system.</description>
  </property>

  <property>
      <name>hadoop.tmp.dir</name>
      <value>/Users/micmiu/tmp/hadoop</value>
      <description>A base for other temporary directories.</description>
  </property>

  <property>
      <name>io.native.lib.available</name>
      <value>false</value>
  </property>

</configuration>

yarn-sites.xml

<configuration>

    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>

    <property>
        <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
        <value>org.apache.hadoop.mapred.ShuffleHandler</value>
    </property>

</configuration>

解决方案

If you just want to run HBase without going into Zookeeper management for standalone HBase, then remove all the property blocks from hbase-site.xml except the property block named hbase.rootdir.

Now run /bin/start-hbase.sh. HBase comes with its own Zookeeper, which gets started when you run /bin/start-hbase.sh, which will suffice if you are trying to get around things for the first time. Later you can put distributed mode configurations for Zookeeper.

You only need to run /sbin/start-dfs.sh for running HBase since the value of hbase.rootdir is set to hdfs://127.0.0.1:9000/hbase in your hbase-site.xml. If you change it to some location on local the filesystem using file:///some_location_on_local_filesystem, then you don't even need to run /sbin/start-dfs.sh.

hdfs://127.0.0.1:9000/hbase says it's a place on HDFS and /sbin/start-dfs.sh starts namenode and datanode which provides underlying API to access the HDFS file system. For knowing about Yarn, please look at http://hadoop.apache.org/docs/r2.3.0/hadoop-yarn/hadoop-yarn-site/YARN.html.

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