我安装了Hadoop 2.9.0。我检查了从属节点中的jps,在奴隶中运行datanode
和nodemanager
,在master中运行namenode
和resourcemanager
。请帮忙,为什么会出现这个错误?根据提出的解决方案,我禁用了firewall
,SELinux
和IPv6
。问题是web UI中的Live nodes
为0。
/ etc / hosts中:
1 localhost
127.0.1.1 hadoopmaster
#The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
192.168.111.154 hadoopmaster
192.168.111... hadoopslave1
192.168.111... hadoopslave2
192.168.111... hadoopslave3
在所有节点中配置:
核心-site.xml中:
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://hadoopmaster:9000</value>
</property>
</configuration>
纱的site.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>
<property>
<name>yarn.resourcemanager.resource-tracker.address</name>
<value>hadoopmaster:8025</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.address</name>
<value>hadoopmaster:8030</value>
</property>
<property>
<name>yarn.resourcemanager.address</name>
<value>hadoopmaster:8050</value>
</property>
</configuration>
netstat -nap | grep 9000
的输出:
tcp 0 0 127.0.1.1:9000 0.0.0.0:* LISTEN 18205/java
tcp 0 0 127.0.0.1:59048 127.0.1.1:9000 TIME_WAIT -
我重新启动hadoop并再次格式化namenode并且agin但是我仍然得到这个错误:(hadoop-hadoop-datanode-hadoopslave1.log)
2018-06-11 02:42:33,593 INFO org.apache.hadoop.ipc.Client:重试连接到服务器:hadoopmaster / 192.168.111.154:9000。已经尝试了4次;重试策略是RetryUpToMaximumCountWithFixedSleep(maxRetries = 10,sleepTime = 1000 MILLISECONDS)
我得到了解决方案。编辑/ etc / hosts