Hi, Some quick pointers: Do you run it in local mode? Is your plugin's plugin.xml and parse-image.jar present in runtime/local/plugins after you build it? Do you use external libraries?
Ferdy. On Fri, Aug 3, 2012 at 1:49 PM, Ake Tangkananond <[email protected]> wrote: > Hello, > > I have question on the Nutch 2 plugin implementation. > > I am implementing an image parser. It used to work fine in Nutch 1.5, but > after I migrate the code to Nutch 2.0, there are some errors which I spend > several hours with it and I was unable to trace the cause of it yet. Would > appreciate the insight here in the mailing list. > > While I was parsing the content fetched, I got the following error in the > logs/hadoop.log > 2012-08-03 18:28:25,304 ERROR parse.ParserFactory - PluginRuntimeException > org.apache.nutch.plugin.PluginRuntimeException: > java.lang.ClassNotFoundException: <my plugin class name> > at > org.apache.nutch.plugin.Extension.getExtensionInstance(Extension.java:166) > at > org.apache.nutch.parse.ParserFactory.getFields(ParserFactory.java:209) > at org.apache.nutch.parse.ParserJob.getFields(ParserJob.java:191) > at org.apache.nutch.parse.ParserJob.run(ParserJob.java:243) > at org.apache.nutch.parse.ParserJob.parse(ParserJob.java:257) > at org.apache.nutch.parse.ParserJob.run(ParserJob.java:300) > at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) > at org.apache.nutch.parse.ParserJob.main(ParserJob.java:304) > Caused by: java.lang.ClassNotFoundException: <my plugin class name> > at java.net.URLClassLoader$1.run(URLClassLoader.java:366) > at java.net.URLClassLoader$1.run(URLClassLoader.java:355) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:354) > at java.lang.ClassLoader.loadClass(ClassLoader.java:423) > at java.lang.ClassLoader.loadClass(ClassLoader.java:356) > at > org.apache.nutch.plugin.Extension.getExtensionInstance(Extension.java:156) > ... 7 more > 2012-08-03 18:28:25,654 INFO crawl.SignatureFactory - Using Signature > impl: > org.apache.nutch.crawl.MD5Signature > > What I did is that I copied minimal necessary files from other plugin > folders and modify it to what I need. Then I edited nutch-site.xml to > include my plugin, edited parse-plugins.xml to register mimeType. I added > parse-image into the 2 packageset under <nutch-source>/build.xml, and added > ant target under deploy and clean in <nutch-source>/src/plugin/build.xml, > then I rebuild all. (These what I did in Nutch 1.5 and it works, but no > luck > for Nutch 2) > > Could you advise what else I miss, or what more information I should > provide. Thank you very much ! > > > Regards, > Ake Tangkananond > > >
