When Nutch crawling process started with '-solr' argument you can face a problem with Solr schema.xml.Some fields can be absent and you will see errors in log:
2012-01-25 11:03:46,484 WARN mapred.LocalJobRunner - job_local_0020 org.apache.solr.common.SolrException: ERROR: [doc=http://business.ngs.ru/] unknown field 'content' ERROR: [doc=http://business.ngs.ru/] unknown field 'content' request: http://localhost:8983/solr/update?wt=javabin&version=2 at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:436) at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:245) at org.apache.solr.client.solrj.request.AbstractUpdateRequest.process(AbstractUpdateRequest.java:105) at org.apache.solr.client.solrj.SolrServer.add(SolrServer.java:49) at org.apache.nutch.indexer.solr.SolrWriter.close(SolrWriter.java:93) at org.apache.nutch.indexer.IndexerOutputFormat$1.close(IndexerOutputFormat.java:48) at org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:474) at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:411) at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:216)To fix this I've copied schema.xml for Solr from http://svn.apache.org/viewvc/nutch/branches/branch-1.4/conf/schema.xml?view=markup.
