java - 运行 Nutch 2 时出现连接拒绝错误

Question

我试图在我的系统上运行 Nutch 2 爬虫，但出现以下错误:

Exception in thread "main" org.apache.gora.util.GoraException: java.io.IOException: java.sql.SQLTransientConnectionException: java.net.ConnectException: Connection refused
at org.apache.gora.store.DataStoreFactory.createDataStore(DataStoreFactory.java:167)
at org.apache.gora.store.DataStoreFactory.createDataStore(DataStoreFactory.java:135)
at org.apache.nutch.storage.StorageUtils.createWebStore(StorageUtils.java:69)
at org.apache.nutch.crawl.InjectorJob.run(InjectorJob.java:243)
at org.apache.nutch.crawl.Crawler.runTool(Crawler.java:68)
at org.apache.nutch.crawl.Crawler.run(Crawler.java:136)
at org.apache.nutch.crawl.Crawler.run(Crawler.java:250)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.nutch.crawl.Crawler.main(Crawler.java:257)
Caused by: java.io.IOException: java.sql.SQLTr
ansientConnectionException: java.net.ConnectException: Connection refused
    at org.apache.gora.sql.store.SqlStore.getConnection(SqlStore.java:747)
    at org.apache.gora.sql.store.SqlStore.initialize(SqlStore.java:160)
    at org.apache.gora.store.DataStoreFactory.initializeDataStore(DataStoreFactory.java:102)
    at org.apache.gora.store.DataStoreFactory.createDataStore(DataStoreFactory.java:161)
    ... 8 more
Caused by: java.sql.SQLTransientConnectionException: java.net.ConnectException: Connection refused
    at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
    at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source)
    at org.hsqldb.jdbc.JDBCDriver.getConnection(Unknown Source)
    at org.hsqldb.jdbc.JDBCDriver.connect(Unknown Source)
    at java.sql.DriverManager.getConnection(DriverManager.java:620)
    at java.sql.DriverManager.getConnection(DriverManager.java:200)
    at org.apache.gora.sql.store.SqlStore.getConnection(SqlStore.java:739)
    ... 11 more
Caused by: org.hsqldb.HsqlException: java.net.ConnectException: Connection refused
    at org.hsqldb.ClientConnection.openConnection(Unknown Source)
    at org.hsqldb.ClientConnection.initConnection(Unknown Source)
    at org.hsqldb.ClientConnection.<init>(Unknown Source)
    ... 17 more
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
    at java.net.Socket.connect(Socket.java:546)
    at java.net.Socket.connect(Socket.java:495)
    at java.net.Socket.<init>(Socket.java:392)
    at java.net.Socket.<init>(Socket.java:206)
    at org.hsqldb.server.HsqlSocketFactory.createSocket(Unknown Source)
    ... 20 more

问题是什么？我的互联网连接是直接的。

Answer 1

我有同样的错误。我更改了连接 U​​RL 从

<property name="connection.url">jdbc:hsqldb:hsql://localhost</property>

到

<property name="connection.url">jdbc:hsqldb:mem://localhost</property>

它成功了。