nutch-1.3使用solrindex出现 Invalid UTF-8 character ...

     用nutch-1.3抓取了大量的页面后，最后用solrindex索引到solr中，发现出现了如下错误：

LinkDb: finished at 2011-08-10 06:14:32, elapsed: 03:13:16
SolrIndexer: starting at 2011-08-10 06:14:32
java.io.IOException: Job failed!
SolrDeleteDuplicates: starting at 2011-08-10 09:37:59
SolrDeleteDuplicates: Solr url: http://10.42.31.96:880
SolrDeleteDuplicates: finished at 2011-08-10 09:41:38, elapsed: 00:03:38
crawl finished: test
       查看logs\ hadoop.log文件，错误提示如下：

 2011-08-10 09:37:58,888 WARN  mapred.LocalJobRunner - job_local_0020
org.apache.solr.common.SolrException: [was class java.io.CharConversionException] Invalid UTF-8 character 0xffff at char #1021643, byte #2821736)  java.lang.RuntimeException: [w
as class java.io.CharConversionException] Invalid UTF-8 character 0xffff at char #1021643, byte #2821736)       at com.ctc.wstx.util.ExceptionUtil.throwRuntimeException(Exceptio
nUtil.java:18)  at com.ctc.wstx.sr.StreamScanner.throwLazyError(StreamScanner.java:731)         at com.ctc.wstx.sr.BasicStreamReader.safeFinishToken(BasicStreamReader.java:3657)
        at com.ctc.wstx.sr.BasicStreamReader.getText(BasicStreamReader.java:809)        at org.apache.solr.handler.XMLLoader.readDoc(XMLLoader.java:266)        at org.apache.sol
r.handler.XMLLoader.processUpdate(XMLLoader.java:126)   at org.apache.solr.handler.XMLLoader.load(XMLLoader.java:77)    at org.apache.solr.handler.ContentStreamHandlerBase.handl
eRequestBody(ContentStreamHandlerBase.java:67)  at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)        at org.apache.solr.core.SolrCore.
execute(SolrCore.java:1310)     at org.rivu.web.servlet.RivuUpdateServlet.doPost(RivuUpdateServlet.java:49)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)    a
t org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)     at org.rivu.web.servlet.RivuFilter.doFilter(RivuFilter.java:294)        at org.ap
ache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChai
n.java:206)     at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)        at org.springframework.web.filter
.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.ap
ache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncod
ingFilter.java:96)      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)   at org.apache.catalina.core.ApplicationFilterChain.intern
alDoFilter(ApplicationFilterChain.java:235)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.apache.catalina.core.Stand
ardWrapperValve.invoke(StandardWrapperValve.java:233)   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)  at org.apache.catalina.core.Stand
ardHostValve.invoke(StandardHostValve.java:128)         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)        at org.apache.catalina.core.Stand
ardEngineValve.invoke(StandardEngineValve.java:109)     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)  at org.apache.coyote.http11.Http11Process
or.process(Http11Processor.java:844)    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)     at org.apache.tomcat.util.net.JIo
Endpoint$Worker.run(JIoEndpoint.java:447)       at java.lang.Thread.run(Thread.java:662) Caused by: java.io.CharConversionException: Invalid UTF-8 character 0xffff at char #1021
643, byte #2821736)     at com.ctc.wstx.io.UTF8Reader.reportInvalid(UTF8Reader.java:335)        at com.ctc.wstx.io.UTF8Reader.read(UTF8Reader.java:249)         at com.ctc.wstx.i
o.MergedReader.read(MergedReader.java:101)      at com.ctc.wstx.io.ReaderSource.readInto(ReaderSource.java:84)  at com.ctc.wstx.io.BranchingReaderSource.readInto(BranchingReader
Source.java:57)         at com.ctc.wstx.sr.StreamScanner.loadMore(StreamScanner.java:992)       at com.ctc.wstx.sr.BasicStreamReader.readTextSecondary(BasicStreamReader.java:462
8)      at com.ctc.wstx.sr.BasicStreamReader.readCoalescedText(BasicStreamReader.java:4126)     at com.ctc.wstx.sr.BasicStreamReader.finishToken(BasicStreamReader.java:3701)   a
t com.ctc.wstx.sr.BasicStreamReader.safeFinishToken(BasicStreamReader.java:3649)        ... 33 more

       solrindex的功能是将从nutch抓取的页面内容及相关信息，并生成xml格式，通过update方式，参数为wt=javabin&version=2提交给solr索引库中。从错误提示看，因xml格式为UTF-8字符集，在生成xml过程中，因数据中存在0xffff等非法字符，而无法生成xml。

    通过google搜索，找到https://issues.apache.org/jira/browse/NUTCH-1016，发现是nutch-1.3的一个Bug，该页面提供了补丁NUTCH1016-1.4-4.patch，解决了这一问题，下载该补丁，并给 SolrWrite.java打上该补丁即可。

 

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package org.apache.nutch.indexer.solr;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map.Entry;
//Commons Logging imports

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.hadoop.mapred.JobConf;
import org.apache.nutch.indexer.NutchDocument;
import org.apache.nutch.indexer.NutchField;
import org.apache.nutch.indexer.NutchIndexWriter;
import org.apache.solr.client.solrj.SolrServer;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.impl.CommonsHttpSolrServer;
import org.apache.solr.common.SolrInputDocument;
import org.apache.solr.common.util.DateUtil;

public class SolrWriter implements NutchIndexWriter {

public static Logger LOG = LoggerFactory.getLogger(SolrWriter.class);

  private SolrServer solr;
  private SolrMappingReader solrMapping;

  private final List<SolrInputDocument> inputDocs =
    new ArrayList<SolrInputDocument>();

  private int commitSize;

  public void open(JobConf job, String name) throws IOException {
    solr = new CommonsHttpSolrServer(job.get(SolrConstants.SERVER_URL));
    commitSize = job.getInt(SolrConstants.COMMIT_SIZE, 1000);
    solrMapping = SolrMappingReader.getInstance(job);
  }

  public void write(NutchDocument doc) throws IOException {
    final SolrInputDocument inputDoc = new SolrInputDocument();
    for(final Entry<String, NutchField> e : doc) {
      for (final Object val : e.getValue().getValues()) {
        // normalise the string representation for a Date
        Object val2 = val;
        
        if (val instanceof Date){
          val2 = DateUtil.getThreadLocalDateFormat().format(val);
        }
        
            
      if (e.getKey().equals("content")||e.getKey().equals("title")||
    		  e.getKey().equals("anchor")||e.getKey().equals("url")) {
           val2 = stripNonCharCodepoints((String)val);               
      }
        

        
        inputDoc.addField(solrMapping.mapKey(e.getKey()), val2, e.getValue().getWeight());
        String sCopy = solrMapping.mapCopyKey(e.getKey());
        if (sCopy != e.getKey()) {
        	inputDoc.addField(sCopy, val);	
        }
      }
    }
    inputDoc.setDocumentBoost(doc.getWeight());
    inputDocs.add(inputDoc);
    if (inputDocs.size() >= commitSize) {
      try {
        LOG.info("Adding " + Integer.toString(inputDocs.size()) + " documents");
        solr.add(inputDocs);
      } catch (final SolrServerException e) {
        throw makeIOException(e);
      }
      inputDocs.clear();
    }
  }

  public void close() throws IOException {
    try {
      if (!inputDocs.isEmpty()) {
        LOG.info("Adding " + Integer.toString(inputDocs.size()) + " documents");
        solr.add(inputDocs);
        inputDocs.clear();
      }
      // solr.commit();
    } catch (final SolrServerException e) {
      throw makeIOException(e);
    }
  }

  public static IOException makeIOException(SolrServerException e) {
    final IOException ioe = new IOException();
    ioe.initCause(e);
    return ioe;
  }

  public static String stripNonCharCodepoints(String input) {
    StringBuilder retval = new StringBuilder();
    char ch;

    for (int i = 0; i < input.length(); i++) {
      ch = input.charAt(i);

      // Strip all non-characters http://unicode.org/cldr/utility/list-unicodeset.jsp?a=[:Noncharacter_Code_Point=True:]
      // and non-printable control characters except tabulator, new line and carriage return
      if (ch % 0x10000 != 0xffff && // 0xffff - 0x10ffff range step 0x10000
          ch % 0x10000 != 0xfffe && // 0xfffe - 0x10fffe range
          (ch <= 0xfdd0 || ch >= 0xfdef) && // 0xfdd0 - 0xfdef
          (ch > 0x1F || ch == 0x9 || ch == 0xa || ch == 0xd)) {

        retval.append(ch);
      }
    }

    return retval.toString();
  }

}