我已经配置了Apache Nutch 2.3.1并抓取了一些网站。我必须将这些文档索引到在云模式下运行的Solr(6.6.3(。当我执行 solrindex 命令时，我得到以下异常
2018-05-02 13:10:40,679 INFO [main] org.apache.hadoop.mapred.MapTask: Ignoring exception during close for org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector@3bd3d05e
java.io.IOException: org.apache.solr.client.solrj.SolrServerException: Server refused connection at: http://10.11.22.156:8983/solr/collection2
at org.apache.nutch.indexwriter.solr.SolrIndexWriter.close(SolrIndexWriter.java:103)
at org.apache.nutch.indexer.IndexWriters.close(IndexWriters.java:114)
at org.apache.nutch.indexer.IndexerOutputFormat$1.close(IndexerOutputFormat.java:54)
at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.close(MapTask.java:670)
at org.apache.hadoop.mapred.MapTask.closeQuietly(MapTask.java:2019)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:797)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1754)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Caused by: org.apache.solr.client.solrj.SolrServerException: Server refused connection at: http://10.11.22.156:8983/solr/collection2
at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:559)
at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:210)
at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:206)
at org.apache.solr.client.solrj.request.AbstractUpdateRequest.process(AbstractUpdateRequest.java:124)
at org.apache.solr.client.solrj.SolrServer.add(SolrServer.java:68)
at org.apache.solr.client.solrj.SolrServer.add(SolrServer.java:54)
at org.apache.nutch.indexwriter.solr.SolrIndexWriter.close(SolrIndexWriter.java:97)
... 11 more
Caused by: org.apache.http.conn.HttpHostConnectException: Connection to http://10.11.22.156:8983 refused
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:190)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:643)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:448)
... 17 more
Caused by: java.net.ConnectException: Connection timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:127)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
问题出在哪里？如果我在没有云模式的情况下使用 solr 重复相同的工作，它可以正常工作。
该错误直接显示您有一个Apache Nutch服务器，该服务器无法访问Apache Solr http://10.11.22.156:8983/solr/collection2 的此特定节点和端口。
您需要在这两个服务器之间进行访问以使它们相互通信：
- 您需要向 solr 服务器提供出站权限，以便使用 Apache Nutch 服务器进行请求响应。
- 此外，您需要向Apache Nutch服务器提供入站权限，以访问给定的solr IP和端口。