我想通过jdbc连接到远程服务器上的cassandra 1.2.4。Apache Cassandra JDBC连接错误
package cassandraclient;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
public class CassClient {
public static void main(String[] args) {
try {
Class.forName("org.apache.cassandra.cql.jdbc.CassandraDriver");
Connection con = DriverManager.getConnection("jdbc:cassandra://<domain>:7199");
String query = "CREATE KEYSPACE CassandraClientTest WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };";
Statement statement = con.createStatement();
boolean success = statement.execute(query);
System.out.println("created keyspace " + success);
statement.close();
con.close();
}
catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
catch (SQLException ex) {
ex.printStackTrace();
}
}
}
当我尝试建立连接时,出现以下异常。
java.sql.SQLNonTransientConnectionException: org.apache.thrift.transport.TTransportException
at org.apache.cassandra.cql.jdbc.CassandraConnection.<init>(CassandraConnection.java:156)
at org.apache.cassandra.cql.jdbc.CassandraDriver.connect(CassandraDriver.java:92)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:207)
at cassandraclient.CassClient.main(CassClient.java:17)
Caused by: org.apache.thrift.transport.TTransportException
at org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:132)
at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
at org.apache.thrift.transport.TFramedTransport.readFrame(TFramedTransport.java:129)
at org.apache.thrift.transport.TFramedTransport.read(TFramedTransport.java:101)
at org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
at org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:378)
at org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:297)
at org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.java:204)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:69)
at org.apache.cassandra.thrift.Cassandra$Client.recv_describe_cluster_name(Cassandra.java:1101)
at org.apache.cassandra.thrift.Cassandra$Client.describe_cluster_name(Cassandra.java:1089)
at org.apache.cassandra.cql.jdbc.CassandraConnection.<init>(CassandraConnection.java:125)
... 4 more
还有一些我注意到的东西。 cassandra的标准端口是9160,我没有指定另一个端口。但是当我尝试再次启动cassandra时,它给了我以下例外。
Error: Exception thrown by the agent : java.rmi.server.ExportException: Port already in use: 7199; nested exception is:
java.net.BindException: Address already in use
这就是为什么我在url中我得到这个异常所使用的端口7199. 当我使用端口9160(和其他港口像9161..2)。
java.sql.SQLNonTransientConnectionException: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused: connect
at org.apache.cassandra.cql.jdbc.CassandraConnection.<init>(CassandraConnection.java:156)
at org.apache.cassandra.cql.jdbc.CassandraDriver.connect(CassandraDriver.java:92)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:207)
at cassandraclient.CassClient.main(CassClient.java:28)
Caused by: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused: connect
at org.apache.thrift.transport.TSocket.open(TSocket.java:183)
at org.apache.cassandra.cql.jdbc.CassandraConnection.<init>(CassandraConnection.java:123)
... 4 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at org.apache.thrift.transport.TSocket.open(TSocket.java:178)
... 5 more
我将不胜感激您的帮助。
老板用datastax-java驱动客户端试试。感谢您的回答,您将不会得到JDBC – abhi 2013-05-02 13:11:19