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xml - Hadoop：错误 conf.Configuration：解析 conf core-site.xml 时出错

问题描述

尝试设置单节点系统并在运行时收到此错误

hadoop jar HadoopWordCount.jar HadoopWordCount input.txt output

从命令行。并得到以下错误。输入、输出和 jar 文件都在同一个目录中。

2018-08-30 10:43:23,266 ERROR conf.Configuration: error parsing conf core-site.xml
com.ctc.wstx.exc.WstxParsingException: Illegal to have multiple roots (start tag in epilog?).
 at [row,col,system-id]: [22,2,"file:/usr/local/Cellar/hadoop/3.1.1/libexec/etc/hadoop/core-site.xml"]

在 IntelliJ 中完美运行，但分配调用命令行。下面是 core-site.xml 文件。

<?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>
</configuration>

<property>
<name>hadoop.tmp.dir</name>
<value>/usr/local/Cellar/hadoop/hdfs/tmp</value>
<description>A base for other temporary directories.</description>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://localhost:9000</value>
</property>

标签： xmlhadoop

解决方案

属性标签应该在配置标签内

<configuration> 
  <property> 
    <name>hadoop.tmp.dir</name> 
    <value>/usr/local/Cellar/hadoop/hdfs/tmp</value> 
    <description>A base for other temporary directories.</description> 
  </property> 
  <property>
    <name>fs.default.name</name>
    <value>hdfs://localhost:9000</value> 
  </property> 
</configuration>

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