I've written a plugin and now nutch fails with an error:

# bin/nutch generate /var/lib/tomcat/crawl/crawldb 
/var/lib/tomcat/crawl/segments -topN 100
topN: 100
Generator: starting
Generator: segment: /var/lib/tomcat/crawl/segments/20061116101759
Generator: Selecting best-scoring urls due for fetch.
Exception in thread "main" java.io.IOException: Job failed!
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:357)
        at org.apache.nutch.crawl.Generator.generate(Generator.java:319)
        at org.apache.nutch.crawl.Generator.main(Generator.java:395)

But I don't know how to debug this? How do I see more debug output?

Any help would be appreciated. Thanks!


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