环境： NUTCH 1.6＆amp; SOLR 4.2.1 。
Nutch＆amp; SOLR正在成功运行。发布到SOLR运行良好。但是当试图从NUTCH发帖时，我得到了“工作失败”。
以下命令用于运行Nutch抓取和发布。
bin / nutch crawl urls -solr http://10.10.10.10:8983/solr/tsdcr -dir crawl -depth 5 -topN 5 -threads 50
输出：
SolrIndexer: finished at 2015-03-27 03:04:29, elapsed: 00:01:46
SolrDeleteDuplicates: starting at 2015-03-27 03:04:29
SolrDeleteDuplicates: Solr url: http://10.10.10.10:8983/solr/tsdcr
Exception in thread "main" java.io.IOException: Job failed!
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1265)
at org.apache.nutch.indexer.solr.SolrDeleteDuplicates.dedup(SolrDeleteDuplicates.java:373)
at org.apache.nutch.indexer.solr.SolrDeleteDuplicates.dedup(SolrDeleteDuplicates.java:353)
at org.apache.nutch.crawl.Crawl.run(Crawl.java:153)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)
Hadoop日志：
2015-03-26 03:04:00,832 DEBUG httpclient.HttpMethodBase - Resorting to protocol version default close connection policy
2015-03-26 03:04:00,832 DEBUG httpclient.HttpMethodBase - Should NOT close connection, using HTTP/1.1
2015-03-26 03:04:00,832 TRACE httpclient.HttpConnection - enter HttpConnection.isResponseAvailable()
2015-03-26 03:04:00,832 TRACE httpclient.HttpConnection - enter HttpConnection.releaseConnection()
2015-03-26 03:04:00,832 DEBUG httpclient.HttpConnection - Releasing connection back to connection manager.
2015-03-26 03:04:00,854 WARN mapred.FileOutputCommitter - Output path is null in cleanup
2015-03-26 03:04:00,854 WARN mapred.LocalJobRunner - job_local_0017
java.lang.NullPointerException
at org.apache.hadoop.io.Text.encode(Text.java:388)
at org.apache.hadoop.io.Text.set(Text.java:178)
at org.apache.nutch.indexer.solr.SolrDeleteDuplicates$SolrInputFormat$1.next(SolrDeleteDuplicates.java:270)
at org.apache.nutch.indexer.solr.SolrDeleteDuplicates$SolrInputFormat$1.next(SolrDeleteDuplicates.java:241)
at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.moveToNext(MapTask.java:236)
at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.next(MapTask.java:216)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:436)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212)
非常感谢任何帮助。
谢谢。