大家好!
我尝试使用PigServer.java。下面是我的代码:
PigServer pigServer = new PigServer(ExecType.LOCAL);
final Map<String, String> predefinedParams = getPredefinedParams();
pigServer.debugOn();
pigServer.setBatchOn();
pigServer.registerScript(DEST_SCRIPT.getAbsolutePath(), predefinedParams);
pigServer.executeBatch();
pigServer.shutdown();
当我在WinXp上运行时,一切都很好。但是当我在Win7上尝试时,出现了异常:
ERROR mapReduceLayer.Launcher: Backend error message during job submission
java.io.IOException: Cannot run program "chmod": CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessBuilder.start(ProcessBuilder.java:460)
................
这是我的猪脚本的内容:
result = LOAD '$data' USING PigStorage('t') AS (user, time, query);
STORE result INTO '$output' USING PigStorage();
你知道为什么会发生这种情况吗?
您是否在WindowsXP主机上安装了cygwin,而在Windows 7主机上没有?
http://javaprotlib.sourceforge.net/packages/io/howtofixhadoop.html给出了可能对你有帮助的建议