hadoop2.4.1配置时出现域名解析失败的解决方法

最新推荐文章于 2023-11-19 19:08:27 发布

zdcjiushixhd

最新推荐文章于 2023-11-19 19:08:27 发布

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分类专栏： java 文章标签： hadoop

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本文记录了一次Hadoop集群中NameNode启动时遇到的域名解析错误，并给出了通过修改/etc/hosts文件来解决该问题的方法。

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java.net.UnknownHostException: www: www: 域名解析暂时失败
        at java.net.InetAddress.getLocalHost(InetAddress.java:1505)
        at org.apache.hadoop.net.DNS.resolveLocalHostname(DNS.java:264)
        at org.apache.hadoop.net.DNS.<clinit>(DNS.java:57)
        at
org.apache.hadoop.hdfs.server.namenode.NNStorage.newBlockPoolID(NNStorage.java:945)
        at
org.apache.hadoop.hdfs.server.namenode.NNStorage.newNamespaceInfo(NNStorage.java:573)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:144)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:899)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1310)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1424)
Caused by: java.net.UnknownHostException: www: 域名解析暂时失败
        at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
        at
java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
        at java.net.InetAddress.getLocalHost(InetAddress.java:1500)
        ... 8 more
17/10/12 03:43:36 WARN net.DNS: Unable to determine address of the
host-falling back to "localhost" address
java.net.UnknownHostException: www: www: 域名解析暂时失败
        at java.net.InetAddress.getLocalHost(InetAddress.java:1505)
        at org.apache.hadoop.net.DNS.resolveLocalHostIPAddress(DNS.java:287)
        at org.apache.hadoop.net.DNS.<clinit>(DNS.java:58)
        at
org.apache.hadoop.hdfs.server.namenode.NNStorage.newBlockPoolID(NNStorage.java:945)
        at
org.apache.hadoop.hdfs.server.namenode.NNStorage.newNamespaceInfo(NNStorage.java:573)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:144)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:899)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1310)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1424)
Caused by: java.net.UnknownHostException: www: 域名解析暂时失败
        at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
        at
java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
        at java.net.InetAddress.getLocalHost(InetAddress.java:1500)
        ... 8 more
17/10/12 03:43:36 INFO namenode.FSImage: Allocated new BlockPoolId:
BP-1989047118-127.0.0.1-1507751016243

修改主机名和IP的映射关系
        vim /etc/hosts

        192.168.8.118   www

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