HDFS下载文件报错！
public static void main(String[] args) throws Exception { System.setProperty("javax.xml.parsers.DocumentBuilderFactory", "com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl"); // 初始化HDFS文件系统; Configuration cfg = new Configuration(); cfg.set("hadoop.job.ugi", "hadoop,supergroup"); // "hadoop,supergroup" cfg.set("fs.default.name", "hdfs://master:9000"); // "hdfs://master:9000" cfg.set("mapred.job.tracker", "hdfs://master:9001"); // "hdfs://master:9001" cfg.set("dfs.http.address", "master:50070"); // "master:50070" FileSystem fs = FileSystem.get(cfg); String localPath = "d:\\temp"; String hdfsPath = "/tmp/query_ret/7/attempt_201007151545_0024_r_000000_0"; fs.copyToLocalFile(new Path(hdfsPath), new Path(localPath)); System.out.print(123); }?
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Running: INSERT OVERWRITE DIRECTORY '/tmp/query_ret/4' select userid from chatagret where 1 = 1 order by userid[2010-07-15 20:36:43,578][ERROR][ULThread_0][ULTJob.java86]java.io.IOException: Cannot run program "chmod": CreateProcess error=2, ?????????at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)at org.apache.hadoop.util.Shell.runCommand(Shell.java:149)at org.apache.hadoop.util.Shell.run(Shell.java:134)at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:286)at org.apache.hadoop.util.Shell.execCommand(Shell.java:354)at org.apache.hadoop.util.Shell.execCommand(Shell.java:337)at org.apache.hadoop.fs.RawLocalFileSystem.execCommand(RawLocalFileSystem.java:481)at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:473)at org.apache.hadoop.fs.FilterFileSystem.setPermission(FilterFileSystem.java:280)at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:372)at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:479)at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:460)at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:367)at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:208)at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:199)at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:142)at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1211)at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1192)at com.huawei.wad.ups.platform.extinterface.entity.task.ULTJobService.generateFileHadoop(ULTJobService.java:707)at com.huawei.wad.ups.platform.extinterface.entity.task.ULTJobService.jobProcessing(ULTJobService.java:165)at com.huawei.wad.ups.platform.extinterface.entity.task.ULTJob.execute(ULTJob.java:79)at com.huawei.wad.ups.platform.service.ultaskmgt.ULTaskHandler.run(ULTaskHandler.java:93)at java.lang.Thread.run(Thread.java:619)Caused by: java.io.IOException: CreateProcess error=2, ?????????at java.lang.ProcessImpl.create(Native Method)at java.lang.ProcessImpl.(ProcessImpl.java:81)at java.lang.ProcessImpl.start(ProcessImpl.java:30)at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)... 22 more
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原因还没找到，谢谢！
1 楼 houzhaowei 2010-10-22 遇到了同样的问题。。。 求解决方案。。。我用的是windows下的eclipse hadoop插件访问远程linux hadoop 服务，遇到了这个问题。。 2 楼 niqingyang 2012-06-04 我也遇到了这个问题 你现在解决了吗 是怎么解决的呀？