我在 LXC 容器内的一台机器上有 3 个 DataNode 和 1 个 NameNode。与 NameNode 位于同一节点上的 DataNode 工作正常,但我没有得到其他 2 个:
Initialization failed for Block pool BP-232943349-10.0.3.112-1417116665984
(Datanode Uuid null) service to hadoop12.domain.local/10.0.3.112:8022
Datanode denied communication with namenode because hostname cannot be resolved
(ip=10.0.3.233, hostname=10.0.3.233): DatanodeRegistration(10.0.3.114,
datanodeUuid=49a6dc47-c988-4cb8-bd84-9fabf87807bf, infoPort=50075, ipcPort=50020,
storageInfo=lv=-56;cid=cluster24;nsid=11020533;c=0)
在日志文件中
请注意,我的 NameNode 位于 IP 10.0.3.112
,在这种情况下,DataNode 失败位于 10.0.3.114
。
所有节点的 FQDN 都在所有节点的主机文件中定义,我可以从所有其他节点 ping 通每个节点。
这里让我感到困惑的是,DataNode 试图在 10.0.3.233
找到 NameNode,这不是列表中的 IP,也不是 NameNode 的 IP
为什么?这个设置在哪里?
第二个失败的 DataNode 位于 10.0.3.113
并且还在寻找它无法解析的不同 IP (10.0.3.158
),因为它未定义且不存在在我的设置中。
工作的节点与 NameNode 一样位于 10.0.3.112
,但在日志中我看到它正在使用 src/和 dst/文件,这些文件是我使用的范围之外的 IP。
像这样:
src: /10.0.3.112:50010, dest: /10.0.3.180:53246, bytes: 60, op: HDFS_READ,
cliID: DFSClient_NONMAPREDUCE_-939581249_2253, offset: 0, srvID: a83af9ba-4e1a-47b3-a5d4-
f437ef60c287, blockid: BP-232943349-10.0.3.112-1417116665984:blk_1073742468_1644,
duration: 1685666
那么这里到底发生了什么,当我的所有节点都看到并相互解析时,为什么我无法到达 NameNode?p>
感谢帮助
PS:/etc/hosts 文件如下所示:
127.0.0.1 localhost
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
10.0.3.1 bigdata.domain.local
192.168.10.33 bigdata.domain.local
10.0.3.111 hadoop11.domain.local
10.0.3.112 hadoop12.domain.local
10.0.3.113 hadoop13.domain.local
10.0.3.114 hadoop14.domain.local
10.0.3.115 hadoop15.domain.local
10.0.3.116 hadoop16.domain.local
10.0.3.117 hadoop17.domain.local
10.0.3.118 hadoop18.domain.local
10.0.3.119 hadoop19.domain.local
10.0.3.121 hadoop21.domain.local
10.0.3.122 hadoop22.domain.local
10.0.3.123 hadoop23.domain.local
10.0.3.124 hadoop24.domain.local
10.0.3.125 hadoop25.domain.local
10.0.3.126 hadoop26.domain.local
10.0.3.127 hadoop27.domain.local
10.0.3.128 hadoop28.domain.local
10.0.3.129 hadoop29.domain.local
核心站点.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!--Autogenerated by Cloudera Manager-->
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://nameservice1</value>
</property>
<property>
<name>fs.trash.interval</name>
<value>1</value>
</property>
<property>
<name>io.compression.codecs</name>
<value>org.apache.hadoop.io.compress.DefaultCodec,org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.BZip2Codec,org.apache.hadoop.io.compress.DeflateCodec,org.apache.hadoop.io.compress.SnappyCodec,org.apache.hadoop.io.compress.Lz4Codec</value>
</property>
<property>
<name>hadoop.security.authentication</name>
<value>simple</value>
</property>
<property>
<name>hadoop.security.authorization</name>
<value>false</value>
</property>
<property>
<name>hadoop.rpc.protection</name>
<value>authentication</value>
</property>
<property>
<name>hadoop.ssl.require.client.cert</name>
<value>false</value>
<final>true</final>
</property>
<property>
<name>hadoop.ssl.keystores.factory.class</name>
<value>org.apache.hadoop.security.ssl.FileBasedKeyStoresFactory</value>
<final>true</final>
</property>
<property>
<name>hadoop.ssl.server.conf</name>
<value>ssl-server.xml</value>
<final>true</final>
</property>
<property>
<name>hadoop.ssl.client.conf</name>
<value>ssl-client.xml</value>
<final>true</final>
</property>
<property>
<name>hadoop.security.auth_to_local</name>
<value>DEFAULT</value>
</property>
<property>
<name>hadoop.proxyuser.oozie.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.oozie.groups</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.mapred.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.mapred.groups</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.flume.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.flume.groups</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.HTTP.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.HTTP.groups</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hive.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hive.groups</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hue.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hue.groups</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.httpfs.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.httpfs.groups</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hdfs.groups</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hdfs.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.security.group.mapping</name>
<value>org.apache.hadoop.security.ShellBasedUnixGroupsMapping</value>
</property>
<property>
<name>hadoop.security.instrumentation.requires.admin</name>
<value>false</value>
</property>
</configuration>
hdfs-site.xml
<
!--Autogenerated by Cloudera Manager-->
<configuration>
<property>
<name>dfs.nameservices</name>
<value>nameservice1</value>
</property>
<property>
<name>dfs.client.failover.proxy.provider.nameservice1</name>
<value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>
<property>
<name>dfs.ha.automatic-failover.enabled.nameservice1</name>
<value>true</value>
</property>
<property>
<name>ha.zookeeper.quorum</name>
<value>hadoop12.domain.local:2181,hadoop13.domain.local:2181,hadoop14.domain.local:2181</value>
</property>
<property>
<name>dfs.ha.namenodes.nameservice1</name>
<value>namenode114,namenode137</value>
</property>
<property>
<name>dfs.namenode.rpc-address.nameservice1.namenode114</name>
<value>hadoop12.domain.local:8020</value>
</property>
<property>
<name>dfs.namenode.servicerpc-address.nameservice1.namenode114</name>
<value>hadoop12.domain.local:8022</value>
</property>
<property>
<name>dfs.namenode.http-address.nameservice1.namenode114</name>
<value>hadoop12.domain.local:50070</value>
</property>
<property>
<name>dfs.namenode.https-address.nameservice1.namenode114</name>
<value>hadoop12.domain.local:50470</value>
</property>
<property>
<name>dfs.namenode.rpc-address.nameservice1.namenode137</name>
<value>hadoop14.domain.local:8020</value>
</property>
<property>
<name>dfs.namenode.servicerpc-address.nameservice1.namenode137</name>
<value>hadoop14.domain.local:8022</value>
</property>
<property>
<name>dfs.namenode.http-address.nameservice1.namenode137</name>
<value>hadoop14.domain.local:50070</value>
</property>
<property>
<name>dfs.namenode.https-address.nameservice1.namenode137</name>
<value>hadoop14.domain.local:50470</value>
</property>
<property>
<name>dfs.replication</name>
<value>3</value>
</property>
<property>
<name>dfs.blocksize</name>
<value>134217728</value>
</property>
<property>
<name>dfs.client.use.datanode.hostname</name>
<value>true</value>
</property>
<property>
<name>fs.permissions.umask-mode</name>
<value>022</value>
</property>
<property>
<name>dfs.namenode.acls.enabled</name>
<value>false</value>
</property>
<property>
<name>dfs.client.read.shortcircuit</name>
<value>false</value>
</property>
<property>
<name>dfs.domain.socket.path</name>
<value>/var/run/hdfs-sockets/dn</value>
</property>
<property>
<name>dfs.client.read.shortcircuit.skip.checksum</name>
<value>false</value>
</property>
<property>
<name>dfs.client.domain.socket.data.traffic</name>
<value>false</value>
</property>
<property>
<name>dfs.datanode.hdfs-blocks-metadata.enabled</name>
<value>true</value>
</property>
</configuration>
最佳答案
你可以改变namenode的hdfs-site.xml
配置
注意 dfs.namenode.datanode.registration.ip-hostname-check
关于hadoop - hdfs Datanode 拒绝与 namenode 通信,因为无法解析主机名,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27195466/