You are passing the "crawldb" as the first argument. That is incorrect. [0] will show you the correct usage.
[0] : http://wiki.apache.org/nutch/bin/nutch_invertlinks Thanks, Tejas Patil On Sat, Feb 16, 2013 at 3:06 AM, Peter Kolb <[email protected]> wrote: > Hi, > > I've sucessfully finished the (inject)-generate-fetch-parse-update cycle > several times (Nutch 1.6 on Ubuntu 12.04), but now the command > > ./bin/nutch invertlinks crawl_instanz1/crawldb/ -dir > crawl_instanz1/segments/ > > fails with: > > LinkDb: starting at 2013-02-16 11:23:21 > LinkDb: linkdb: crawl_instanz1/crawldb > LinkDb: URL normalize: true > LinkDb: URL filter: true > LinkDb: internal links will be ignored. > LinkDb: adding segment: > file:/home/nutch/nutch-1.6-instanz-1/crawl_instanz1/segments/20130215170554 > LinkDb: adding segment: > file:/home/nutch/nutch-1.6-instanz-1/crawl_instanz1/segments/20130215172647 > LinkDb: adding segment: > file:/home/nutch/nutch-1.6-instanz-1/crawl_instanz1/segments/20130215164631 > LinkDb: merging with existing linkdb: crawl_instanz1/crawldb > LinkDb: java.io.IOException: Job failed! > at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1265) > at org.apache.nutch.crawl.LinkDb.invert(LinkDb.java:195) > at org.apache.nutch.crawl.LinkDb.run(LinkDb.java:295) > at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) > at org.apache.nutch.crawl.LinkDb.main(LinkDb.java:260) > > hadoop.log says: > > 2013-02-16 11:23:35,202 WARN mapred.LocalJobRunner - job_local_0002 > java.lang.ClassCastException: org.apache.nutch.crawl.CrawlDatum cannot be > cast to org.apache.nutch.crawl.Inlinks > at org.apache.nutch.crawl.LinkDbFilter.map(LinkDbFilter.java:39) > at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50) > at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:436) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372) > at > org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212) > 2013-02-16 11:23:36,098 ERROR crawl.LinkDb - LinkDb: java.io.IOException: > Job failed! > at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1265) > at org.apache.nutch.crawl.LinkDb.invert(LinkDb.java:195) > at org.apache.nutch.crawl.LinkDb.run(LinkDb.java:295) > at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) > at org.apache.nutch.crawl.LinkDb.main(LinkDb.java:260) > > What can I do? > > Thanks. > Peter >
