学步园

nutch部署过程中出现了下面错误，主要是没有正确配置插件导致的，可以通过设置nutch-site.xml文件的plugin.folders属性解决问题

java.lang.RuntimeException: Error in configuring object
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
	at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:354)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
	at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
	... 5 more
Caused by: java.lang.RuntimeException: Error in configuring object
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
	at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
	at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
	... 10 more
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
	... 13 more
Caused by: java.lang.RuntimeException: x point org.apache.nutch.net.URLNormalizer not found.
	at org.apache.nutch.net.URLNormalizers.<init>(URLNormalizers.java:122)
	at org.apache.nutch.crawl.Injector$InjectMapper.configure(Injector.java:70)
	... 18 more