重试连接服务器：已尝试 9 次；重试策略是 RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

Question

我有三个物理节点。在每个节点中，我使用此命令输入 docker。

   docker run -v /home/user/.ssh:/root/.ssh --privileged 
   -p 5050:5050 -p 5051:5051 -p 5052:5052 -p 2181:2181 -p 8089:8081 
   -p 6123:6123 -p 8084:8080 -p 50090:50090 -p 50070:50070 
   -p 9000:9000 -p 2888:2888 -p 3888:3888 -p 4041:4040 -p 8020:8020 
   -p 8485:8485 -p 7078:7077 -p 52222:22 -e WEAVE_CIDR=10.32.0.3/12 
   -e MESOS_EXECUTOR_REGISTRATION_TIMEOUT=5mins 
   -e LIBPROCESS_IP=10.32.0.3 
   -e MESOS_RESOURCES=ports*:[11000-11999] 
   -ti hadoop_marathon_mesos_flink_2 /bin/bash

我这样配置 hadoop： 核心-site.xml :

 <configuration>
   <property>
     <name>fs.defaultFS</name>
     <value>hdfs://mycluster</value>
   </property>
   <property>
     <name>fs.default.name</name>
     <value>hdfs://mycluster</value>
   </property>
 </configuration>

hdfs-site.xml:

  <configuration>
    <property>
      <name>dfs.namenode.shared.edits.dir</name>
      <value>
   qjournal://10.32.0.1:8485;10.32.0.2:8485;10.32.0.3:8485/mycluster
      </value>
    </property>

    <property>
      <name>dfs.journalnode.edits.dir</name>
      <value>/tmp/hadoop/dfs/jn</value>
    </property>

    <property>
      <name>dfs.nameservices</name>
      <value>mycluster</value>
      <description>Logical name for this new 
      nameservice</description>
    </property>

    <property>
      <name>dfs.ha.namenodes.mycluster</name>
      <value>nn1,nn2</value>
      <description>Unique identifiers for each NameNode in the 
      nameservice</description>
    </property>

     <property>
       <name>dfs.namenode.rpc-address.mycluster.nn1</name>
       <value>10.32.0.1:8020</value>
     </property>

     <property>
       <name>dfs.namenode.rpc-address.mycluster.nn2</name>
       <value>10.32.0.2:8020</value>
     </property>

     <property>
       <name>dfs.namenode.http-address.mycluster.nn1</name>
       <value>10.32.0.1:50070</value>
     </property>

     <property>
       <name>dfs.namenode.http-address.mycluster.nn2</name>
       <value>10.32.0.2:50070</value>
     </property>

     <property>
       <name>dfs.client.failover.proxy.provider.mycluster</name>
       <value>
           org.apache.hadoop.hdfs.server.namenode.ha.
           ConfiguredFailoverProxyProvider
       </value>
     </property>

     <property>
       <name>dfs.ha.fencing.methods</name>
       <value>shell(/bin/true)</value>
     </property>

     <property>
       <name>dfs.replication</name>
       <value>1</value>
     </property>

     <property>
       <name>dfs.namenode.name.dir</name>
       <value>file:///usr/local/hadoop_store/hdfs/namenode</value>
     </property>

     <property>
       <name>dfs.datanode.data.dir</name>
       <value>file:///usr/local/hadoop_store/hdfs/datanode</value>
     </property>

     <property>
       <name>dfs.namenode.datanode.registration.
       ip-hostname-check</name>
       <value>false</value>
     </property>

     <property>
       <name>dfs.ha.automatic-failover.enabled</name>
       <value>true</value>
     </property>

     <property>
       <name>ha.zookeeper.quorum</name>
       <value>10.32.0.1:2181,10.32.0.2:2181,10.32.0.3:2181</value>
     </property>
   </configuration>

问题是当我格式化 namenode:

   hadoop namenode -format

无法格式化namenode。我收到此错误：

2019-05-06 06:35:09,969 INFO ipc.Client: Retrying connect to server: 10.32.0.2/10.32.0.2:8485. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

2019-05-06 06:35:09,969 INFO ipc.Client: Retrying connect to server: 10.32.0.3/10.32.0.3:8485. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

2019-05-06 06:35:09,987 ERROR namenode.NameNode: Failed to start namenode. org.apache.hadoop.hdfs.qjournal.client.QuorumException: Unable to check if JNs are ready for formatting. 1 exceptions thrown:

10.32.0.1:8485: Call From 50c5244de4cd/10.32.0.1 to 50c5244de4cd:8485 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused

我已经发布了 Hadoop 所需的端口，但我仍然收到 连接被拒绝。

有人能告诉我配置有什么问题吗？

提前致谢。

Answer 1

问题解决是因为 core-site.xml 中的 zookeeper 配置。我在下面解释了高可用 hadoop 配置的详细信息： hdfs-site.xml:

<property>
     <name>dfs.nameservices</name>
     <value>mycluster</value>
     <description>Logical name for this new nameservice</description>
</property>
<property>
     <name>dfs.ha.namenodes.mycluster</name>
     <value>nn1,nn2</value>
     <description>Unique identifiers for each NameNode in 
      the nameservice</description>
</property>
<property>
     <name>dfs.namenode.rpc-address.mycluster.nn1</name>
     <value>10.32.0.1:8020</value>
</property>
<property>
     <name>dfs.namenode.rpc-address.mycluster.nn2</name>
     <value>10.32.0.2:8020</value>
</property>
<property>
     <name>dfs.namenode.http-address.mycluster.nn1</name>
     <value>10.32.0.1:50070</value>
</property>
<property>
     <name>dfs.namenode.http-address.mycluster.nn2</name>
     <value>10.32.0.2:50070</value>
</property>
<property>
     <name>dfs.client.failover.proxy.provider.mycluster</name>
     <value>org.apache.hadoop.hdfs.
     server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>
<property>
     <name>dfs.namenode.shared.edits.dir</name>
     <value>
      qjournal://10.32.0.1:8485;10.32.0.2:8485;10.32.0.3:8485/mycluster
     </value>
</property>
<property>
     <name>dfs.permissions.enable</name>
     <value> false </value>
</property>
<property>
    <name>dfs.ha.fencing.methods</name>
    <value>sshfence</value>
</property>
<property>
    <name>dfs.ha.fencing.ssh.private-key-files</name>
    <value>/home/hdfs/.ssh/id_rsa</value>
</property>
<property>
    <name>dfs.ha.fencing.ssh.connect-timeout</name>
    <value>30000</value>
</property>
<property>
    <name>dfs.permissions.superusergroup</name>
    <value>hdfs</value>
</property>
<property>
    <name>dfs.replication</name>
    <value>1</value>
</property>
<property>
    <name>dfs.namenode.name.dir</name>
    <value>file:///usr/local/hadoop_store/hdfs/namenode</value>
</property>
<property>
    <name>dfs.datanode.data.dir</name>
    <value>file:///usr/local/hadoop_store/hdfs/datanode</value>
</property>
<property>
    <name>dfs.namenode.datanode.registration.ip-hostname-check</name>
    <value>false</value>
</property>
<property>
    <name>dfs.ha.automatic-failover.enabled</name>
    <value>true</value>
</property>

core-site.xml（例如在节点“10.32.0.1”中）：

 <property>
    <name>fs.defaultFS</name>
    <value>hdfs://mycluster</value>
 </property>
 <property>
    <name>dfs.journalnode.edits.dir</name>
    <value>/tmp/hadoop/dfs/journalnode</value>
 </property>
 <property>
    <name>fs.default.name</name>
    <value>hdfs://mycluster</value>
 </property>
 <property>
    <name>ha.zookeeper.quorum</name>
    <value>0.0.0.0:2181,10.32.0.2:2181,10.32.0.3:2181</value>
 </property>

例如“10.32.0.1”中的 Zookeeper 配置是：

  server.1=0.0.0.0:2888:3888
  server.2=10.32.0.2:2888:3888
  server.3=10.32.0.3:2888:3888

此外，我在 /var/lib/zookeeper/data 中创建了 myid 文件，其中包含该节点的 ID。首先，删除所有波纹管文件夹：

  rm -rf /tmp/hadoop/dfs/journalnode
  rm -rf /usr/local/hadoop_store/hdfs/namenode
  rm -rf /usr/local/hadoop_store/hdfs/datanode
  rm -rf /opt/hadoop/logs/*

然后，创建这些文件夹：

  mkdir /usr/local/hadoop_store/hdfs/namenode
  mkdir /usr/local/hadoop_store/hdfs/datanode

之后，给这些文件夹正确的权限：

  chmod 777 /usr/local/hadoop_store/hdfs/namenode
  chmod 777 /usr/local/hadoop_store/hdfs/datanode
  chown -R root /usr/local/hadoop_store/hdfs/namenode
  chown -R root /usr/local/hadoop_store/hdfs/datanode
  chmod 777 /tmp/hadoop/dfs/journalnode
  chown -R root /tmp/hadoop/dfs/journalnode

现在您可以按照这个阶段格式化这些文件夹。最重要的是如何格式化这三个节点。您必须遵循以下阶段： 1.停止hdfs服务 2. 只启动日志节点（因为它们需要知道格式）

   /opt/hadoop/bin/hdfs --daemon start journalnode

在第一个名称节点上（作为用户 hdfs 或 root）

hadoop namenode -format
在期刊节点上：

hdfs namenode -initializeSharedEdits -force
重新启动 Zookeeper：

/home/zookeeper-3.4.14/bin/zkServer.sh 重启

格式化动物园管理员：

hdfs zkfc -formatZK -force (to force zookeeper to reinitialise)

重新启动第一个名称节点：

/opt/hadoop/bin/hdfs --daemon start namenode

在第二个名称节点上：

hdfs namenode -bootstrapStandby -force (force synch with first namenode)

在每个数据节点上清除数据目录：
```
hadoop datanode -format
```
重启HDFS服务：
```
/opt/hadoop/sbin/start-dfs.sh
```

顺便说一句，我有三个节点，两个名称节点和一个数据节点。可以在/opt/hadoop/logs/.

查看hadoop登录

重试连接服务器：已尝试 9 次；重试策略是 RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

Retrying connect to server: Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

hadoop

docker

weave