假如没有配置name和data的路径。会默认放到.tmp下重启就会消失。
hdfs-site.xml
<?xml version="1.0" encoding="UTF-8"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <!-- Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. See accompanying LICENSE file. --> <!-- Put site-specific property overrides in this file. --> <configuration> <property> <name>dfs.replication</name> <value>1</value> </property> <property> <name>dfs.name.dir</name> <value>/opt/bigdata/hadoop-2.6.5/dir/name</value> <final>true</final> </property> <property> <name>dfs.data.dir</name> <value>/opt/bigdata/hadoop-2.6.5/dir/data</value> <final>true</final> </property> <property> <name>fs.checkpoint.dir</name> <value>/opt/bigdata/hadoop-2.6.5/dir/checkpoint</value> <final>true</final> </property> </configuration>