I found my problem: I added a chinese Analyzer plugin to nutch. and there is something wrong with the plugin:the plugin didn't add PositionIncrementAttribute to tokenStream. I have fixed it.
2010/12/11 Bupo Jung <[email protected]> > Hi, > I run org.apache.nutch.searcher.NutchBean to test the searching function. > I found it only return the total hits but no hits details or summarys. > > I check the hadoop.log found this error: > > 2010-12-11 10:57:47,752 ERROR searcher.NutchBean - Exception occured while > executing search: java.lang.RuntimeException: > java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: > This AttributeSource does not have the attribute > 'org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute'. > java.lang.RuntimeException: java.util.concurrent.ExecutionException: > java.lang.IllegalArgumentException: This AttributeSource does not have the > attribute > 'org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute'. > at > org.apache.nutch.searcher.FetchedSegments.getSummary(FetchedSegments.java:297) > at org.apache.nutch.searcher.NutchBean.getSummary(NutchBean.java:350) > at org.apache.nutch.searcher.NutchBean.main(NutchBean.java:415) > Caused by: java.util.concurrent.ExecutionException: > java.lang.IllegalArgumentException: This AttributeSource does not have the > attribute > 'org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute'. > at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222) > at java.util.concurrent.FutureTask.get(FutureTask.java:83) > at > org.apache.nutch.searcher.FetchedSegments.getSummary(FetchedSegments.java:292) > ... 2 more > Caused by: java.lang.IllegalArgumentException: This AttributeSource does > not have the attribute > 'org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute'. > at > org.apache.lucene.util.AttributeSource.getAttribute(AttributeSource.java:277) > at > org.apache.nutch.summary.basic.BasicSummarizer.getTokens(BasicSummarizer.java:362) > at > org.apache.nutch.summary.basic.BasicSummarizer.getSummary(BasicSummarizer.java:134) > at > org.apache.nutch.searcher.FetchedSegments.getSummary(FetchedSegments.java:263) > at > org.apache.nutch.searcher.FetchedSegments$SummaryTask.call(FetchedSegments.java:63) > at > org.apache.nutch.searcher.FetchedSegments$SummaryTask.call(FetchedSegments.java:53) > at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) > at java.util.concurrent.FutureTask.run(FutureTask.java:138) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:662) > > How can i fix this? > > by bupo.jung >
