执行hadoop-mapreduce-examples-2.2.0.jar时出错(Error while executing hadoop-mapreduce-examples-2.2.0.jar)
作为hadoop的初学者,我开始尝试在ubuntu中配置单节点hadoop集群。 在安装和配置之后,我使用hadoop处理示例部分,它抛出了以下错误
hduser1@ubuntu:/usr/local/hadoop$ hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce- examples-2.2.0.jar pi 2 5 java.lang.NoSuchMethodError: org.apache.hadoop.util.ProgramDriver.run([Ljava/lang/String;)I at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
我使用过Java-7-oracle和Ubuntu 12.04并按照这篇文章来安装和配置hadoop: http : //codesfusion.blogspot.in/2013/10/setup-hadoop-2x-220-on-ubuntu.html
Being a beginner to hadoop,I started to try out configuring a single node hadoop cluster in ubuntu. After installation and configuration, I worked with the example part with hadoop and it have thrown the following error
hduser1@ubuntu:/usr/local/hadoop$ hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce- examples-2.2.0.jar pi 2 5 java.lang.NoSuchMethodError: org.apache.hadoop.util.ProgramDriver.run([Ljava/lang/String;)I at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
I have used Java-7-oracle and Ubuntu 12.04 and followed this post to install and configure hadoop: http://codesfusion.blogspot.in/2013/10/setup-hadoop-2x-220-on-ubuntu.html
原文:https://stackoverflow.com/questions/22283412
最满意答案
MVC从不做回传。 因此,
IsPostBack
将始终正确地为假。 你认为回传的东西实际上是一个POST,因为MVC不会回发。 您不应该在MVC中使用ASP.NET服务器控件。MVC never does postbacks. Therefore,
IsPostBack
will always, correctly, be false. The thing you think is a postback is actually a POST, because MVC doesn't do postbacks. You should not be using the ASP.NET server controls at all in MVC.
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