The processing instruction target matching "[xX][mM][lL]" is not allowed.

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于 2019-04-03 20:26:03 发布

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分类专栏：大数据文章标签： hadoop

本文链接：https://blog.youkuaiyun.com/u011396219/article/details/89004203

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本文记录了一次Hadoop HDFS NameNode启动失败的经历，并详细解释了错误原因：hdfs-site.xml文件开头存在非法的空格或空行。通过解决此问题，强调了XML配置文件格式的重要性。

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org.xml.sax.SAXParseException; systemId: file:/usr/local/hadoop-2.7.6/etc/hadoop/hdfs-site.xml; lineNumber: 4; columnNumber: 6; The processing instruction target matching “[xX][mM][lL]” is not allowed.
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:150)
at org.apache.hadoop.conf.Configuration.parse(Configuration.java:2552)
at org.apache.hadoop.conf.Configuration.parse(Configuration.java:2540)
at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2614)
at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2564)
at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2477)
at org.apache.hadoop.conf.Configuration.set(Configuration.java:1213)
at org.apache.hadoop.conf.Configuration.set(Configuration.java:1185)
at org.apache.hadoop.conf.Configuration.setBoolean(Configuration.java:1521)
at org.apache.hadoop.util.GenericOptionsParser.processGeneralOptions(GenericOptionsParser.java:321)
at org.apache.hadoop.util.GenericOptionsParser.parseGeneralOptions(GenericOptionsParser.java:487)
at org.apache.hadoop.util.GenericOptionsParser.(GenericOptionsParser.java:170)
at org.apache.hadoop.util.GenericOptionsParser.(GenericOptionsParser.java:153)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1445)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1582)
19/04/03 05:21:31 ERROR namenode.NameNode: Failed to start namenode.
java.lang.RuntimeException: org.xml.sax.SAXParseException; systemId: file:/usr/local/hadoop-2.7.6/etc/hadoop/hdfs-site.xml; lineNumber: 4; columnNumber: 6; The processing instruction target matching “[xX][mM][lL]” is not allowed.
at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2728)
at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2564)
at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2477)
at org.apache.hadoop.conf.Configuration.set(Configuration.java:1213)
at org.apache.hadoop.conf.Configuration.set(Configuration.java:1185)
at org.apache.hadoop.conf.Configuration.setBoolean(Configuration.java:1521)
at org.apache.hadoop.util.GenericOptionsParser.processGeneralOptions(GenericOptionsParser.java:321)
at org.apache.hadoop.util.GenericOptionsParser.parseGeneralOptions(GenericOptionsParser.java:487)
at org.apache.hadoop.util.GenericOptionsParser.(GenericOptionsParser.java:170)
at org.apache.hadoop.util.GenericOptionsParser.(GenericOptionsParser.java:153)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1445)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1582)
Caused by: org.xml.sax.SAXParseException; systemId: file:/usr/local/hadoop-2.7.6/etc/hadoop/hdfs-site.xml; lineNumber: 4; columnNumber: 6; The processing instruction target matching “[xX][mM][lL]” is not allowed.
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:150)
at org.apache.hadoop.conf.Configuration.parse(Configuration.java:2552)
at org.apache.hadoop.conf.Configuration.parse(Configuration.java:2540)
at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2614)
… 11 more