我怎样才能使用java HDFS一个新的目录? [英] How can i make a new directory in hdfs with java?
问题描述
public static void main(String[] args) throws IOException, URISyntaxException
{
配置配置=新配置();
{ Configuration config = new Configuration();
config.set("fs.default.name","hdfs://127.0.0.1:50070/dfshealth.jsp");
FileSystem dfs = FileSystem.get(config);
String dirName = "TestDirectory";
Path src = new Path(dfs.getWorkingDirectory()+"/"+dirName);
dfs.mkdirs(src);
}
}
} }
Thier是一个例外
异常线程mainjava.lang.NoClassDefFoundError的:组织/阿帕奇/共享/配置/配置
在org.apache.hadoop.metrics2.lib.DefaultMetricsSystem(DefaultMetricsSystem.java:37)
在org.apache.hadoop.metrics2.lib.DefaultMetricsSystem(DefaultMetricsSystem.java:34)
在org.apache.hadoop.security.UgiInstrumentation.create(UgiInstrumentation.java:51)
在org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:217)
在org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:185)
在org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:237)
在org.apache.hadoop.security.KerberosName(KerberosName.java:79)
在org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:210)
在org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:185)
在org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:237)
在org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:482)
在org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:468)
在org.apache.hadoop.fs.FileSystem $缓存$键(FileSystem.java:1519)
在org.apache.hadoop.fs.FileSystem $ Cache.get(FileSystem.java:1420)
在org.apache.hadoop.fs.FileSystem.get(FileSystem.java:254)
在org.apache.hadoop.fs.FileSystem.get(FileSystem.java:123)
在com.TestConnection.main(TestConnection.java:21)
抛出java.lang.ClassNotFoundException:引起org.apache.commons.configuration.Configuration
在java.net.URLClassLoader的$ 1.run(URLClassLoader.java:366)
在java.net.URLClassLoader的$ 1.run(URLClassLoader.java:355)
在java.security.AccessController.doPrivileged(本机方法)
在java.net.URLClassLoader.findClass(URLClassLoader.java:354)
在java.lang.ClassLoader.loadClass(ClassLoader.java:425)
在sun.misc.Launcher $ AppClassLoader.loadClass(Launcher.java:308)
在java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 17个
CONFIGRATION是真实的
有什么问题 ?
任何帮助!
Thier was an exception Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/configuration/Configuration at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.(DefaultMetricsSystem.java:37) at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.(DefaultMetricsSystem.java:34) at org.apache.hadoop.security.UgiInstrumentation.create(UgiInstrumentation.java:51) at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:217) at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:185) at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:237) at org.apache.hadoop.security.KerberosName.(KerberosName.java:79) at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:210) at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:185) at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:237) at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:482) at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:468) at org.apache.hadoop.fs.FileSystem$Cache$Key.(FileSystem.java:1519) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1420) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:254) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:123) at com.TestConnection.main(TestConnection.java:21) Caused by: java.lang.ClassNotFoundException: org.apache.commons.configuration.Configuration at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ... 17 more Configration is true what is the problem ? any help !!!
推荐答案
有关您的问题,您必须添加公共配置-1.6.jar桶。
For your issue ,you have to add commons-configuration-1.6.jar jar..
我列了出来必要的罐子下面
i listed out necessary jars below
{
Configuration config = new Configuration();
config.addResource(new Path("/etc/hadoop/conf/core-site.xml"));
config.addResource(new Path("/etc/hadoop/conf/hdfs-site.xml"));
config.set("fs.hdfs.impl",
org.apache.hadoop.hdfs.DistributedFileSystem.class.getName()
);
config.set("fs.file.impl",
org.apache.hadoop.fs.LocalFileSystem.class.getName()
);
FileSystem dfs = FileSystem.get(config);
String dirName = "TestDirectory";
System.out.println(dfs.getWorkingDirectory() +" this is from /n/n");
Path src = new Path(dfs.getWorkingDirectory()+"/"+dirName);
dfs.mkdirs(src);
} }
您必须在您的构建路径下面添加罐子的清单。
You have to add below list of jars in your build path.
公地CLI-1.2.jar
commons-cli-1.2.jar
commons-collections提供-3.2.1.jar
commons-collections-3.2.1.jar
公地配置-1.6.jar
commons-configuration-1.6.jar
公地郎2.5.jar
commons-lang-2.5.jar
的commons-logging-1.1.1.jar
commons-logging-1.1.1.jar
番石榴11.0.2.jar
guava-11.0.2.jar
Hadoop的auth.jar
hadoop-auth.jar
Hadoop的common.jar
hadoop-common.jar
的protobuf-java的2.4.0a.jar
protobuf-java-2.4.0a.jar
SLF4J-API-1.6.1.jar
slf4j-api-1.6.1.jar
的log4j-1.2.17.jar
log4j-1.2.17.jar
Hadoop的hdfs.jar
hadoop-hdfs.jar
这在Hadoop中/ lib文件夹中所有可用的罐子,如果它是Cloudera的。
These all jars available in hadoop/lib folder if it is cloudera.
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