Ich habe eine Site auf meinem lokalen Computer, auf der ich versuche, mit Nutch und index in Solr zu crawlen (beides auch auf meinem lokalen Computer). Ich habe Solr 4.6.1 und Nutch 1.7 gemäß den Anweisungen auf der Nutch-Website installiert (http://wiki.apache.org/nutch/NutchTutorial), und ich habe Solr ohne Problem in meinem Browser ausgeführt.

Ich führe den folgenden Befehl aus:

bin/nutch crawl urls -solr http://localhost:8983/solr/ -depth 1 -topN 2

Der Crawl funktioniert einwandfrei, aber wenn versucht wird, die Daten in Solr zu speichern, schlägt er mit der folgenden Ausgabe fehl:

Indexer: starting at 2014-02-06 16:29:28
Indexer: deleting gone documents: false
Indexer: URL filtering: false
Indexer: URL normalizing: false
Active IndexWriters :
SOLRIndexWriter
    solr.server.url : URL of the SOLR instance (mandatory)
    solr.commit.size : buffer size when sending to SOLR (default 1000)
    solr.mapping.file : name of the mapping file for fields (default solrindex-mapping.xml)
    solr.auth : use authentication (default false)
    solr.auth.username : use authentication (default false)
    solr.auth : username for authentication
    solr.auth.password : password for authentication


Exception in thread "main" java.io.IOException: Job failed!
    at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1357)
    at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:123)
    at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:81)
    at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:65)
    at org.apache.nutch.crawl.Crawl.run(Crawl.java:155)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
    at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)

Ich habe das Protokollverzeichnis von Nutch aufgerufen und die Datei hadoop.log überprüft. Sie zeigt Folgendes:

2014-02-06 16:29:28,920 INFO  solr.SolrIndexWriter - Indexing 1 documents
2014-02-06 16:29:28,921 INFO  httpclient.HttpMethodDirector - I/O exception (org.apache.commons.httpclient.NoHttpResponseException) caught when processing request: The server localhost failed to respond
2014-02-06 16:29:28,921 INFO  httpclient.HttpMethodDirector - Retrying request
2014-02-06 16:29:28,924 WARN  mapred.LocalJobRunner - job_local331896790_0009
java.io.IOException
    at org.apache.nutch.indexwriter.solr.SolrIndexWriter.makeIOException(SolrIndexWriter.java:173)
    at org.apache.nutch.indexwriter.solr.SolrIndexWriter.close(SolrIndexWriter.java:159)
    at org.apache.nutch.indexer.IndexWriters.close(IndexWriters.java:118)
    at org.apache.nutch.indexer.IndexerOutputFormat$1.close(IndexerOutputFormat.java:44)
    at org.apache.hadoop.mapred.ReduceTask$OldTrackingRecordWriter.close(ReduceTask.java:467)
    at org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:535)
    at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:421)
    at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:398)
Caused by: org.apache.solr.client.solrj.SolrServerException: java.net.SocketException: Connection reset
    at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:478)
    at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:244)
    at org.apache.solr.client.solrj.request.AbstractUpdateRequest.process(AbstractUpdateRequest.java:105)
    at org.apache.nutch.indexwriter.solr.SolrIndexWriter.close(SolrIndexWriter.java:155)
    ... 6 more
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:168)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
    at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78)
    at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106)
    at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116)
    at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973)
    at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735)
    at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1098)
    at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
    at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
    at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:422)

Trotzdem kann ich in meinem Browser problemlos auf Solr zugreifen. Dies ist mein erster Versuch bei Solr / Nutch - jede Hilfe von denen mit mehr Wissen wäre sehr dankbar. Vielen Dank.