最近使用eclipse操作hdfs遇到如下报错
log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" java.io.FileNotFoundException: /first.txt (Permission denied)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.<init>(RawLocalFileSystem.java:223)
at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.<init>(RawLocalFileSystem.java:219)
at org.apache.hadoop.fs.RawLocalFileSystem.create(RawLocalFileSystem.java:282)
at org.apache.hadoop.fs.RawLocalFileSystem.create(RawLocalFileSystem.java:269)
at org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSOutputSummer.<init>(ChecksumFileSystem.java:384)
at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:443)
at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:424)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:905)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:886)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:783)
at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:365)
at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:338)
at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:289)
at org.apache.hadoop.fs.LocalFileSystem.copyFromLocalFile(LocalFileSystem.java:81)
at org.apache.hadoop.fs.FileSystem.copyFromLocalFile(FileSystem.java:1954)
at CopyFromLocal.CopyFile.main(CopyFile.java:17)
网上搜索资料都是说权限不足，使用chmod 777 提高目录使用权限，可是并没有解决问题，后来发现原来是少了下面两行代码
conf.addResource(new Path("core-site.xml"));
conf.addResource(new Path("hdfs-site.xml"));
