Cassandra CQL JDBC Exception : java.lang.ClassNotFoundException: org.apache.thrift.TEnum - jdbc

Question

I have tried with the following code to connect CASSANDRA Database on my local system.
package com.prm.cassandra;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
public class CassandraUserManager {
public static void connectToCassandra(){
DataBaseConnection dbCon = new DataBaseConnection();
Connection con = null;
PreparedStatement pstmt = null;
ResultSet rs = null;
try{
con = dbCon.getConnection();
String query = "SELECT * from users";
pstmt = con.prepareStatement(query);
rs = pstmt.executeQuery();
System.out.println("The Details are printed below.");
ResultSetMetaData rmd = rs.getMetaData();
while(rs.next()){
for(int i=0; i<rmd.getColumnCount(); i++)
System.out.print(" "+rs.getString(i));
}
}catch(Exception ex){
ex.printStackTrace();
}finally{
dbCon.closeResources(con, pstmt, rs);
}
}
}
And used the following lines to get the database connection
Class.forName("org.apache.cassandra.cql.jdbc.CassandraDriver");
Connection con = DriverManager.getConnection("jdbc:cassandra://127.0.0.1:9160/demo");
But got the below runtime exception.
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Jul 16, 2013 1:08:39 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet connectCassandra threw exception
java.lang.ClassNotFoundException: org.apache.thrift.TEnum
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1360)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1206)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1819)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:872)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1327)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1206)
at org.apache.cassandra.cql.jdbc.Utils.<clinit>(Utils.java:62)
at org.apache.cassandra.cql.jdbc.CassandraDriver.connect(CassandraDriver.java:85)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:207)
at com.prm.cassandra.DataBaseConnection.getConnection(DataBaseConnection.java:14)
at com.prm.cassandra.CassandraUserManager.connectToCassandra(CassandraUserManager.java:15)
at com.prm.cassandra.CassandraServlet.doGet(CassandraServlet.java:28)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:680)
I have used the below mentioned jars as suggested by CASSANDRA-JDBC Example
apache-cassandra-clientutil-1.2.6.jar
apache-cassandra-thrift-1.2.6.jar
cassandra-jdbc-1.2.5.jar
and the below one for logging
slf4j-api-1.6.1.jar
Please help me out in resolving this. Waiting for an useful answer. Thanks in advance.

Answer 1

Please try using the following code below.... and the procedure given in the site... you will be able to solve the same.
http://www.bigdataplanet.info/2013/08/How-to-use-Cassandra-CQL-in-your-Java-Application.html
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class CqlConnection {
public static void main(String[] args) throws Exception{
Connection con = null;
try {
Class.forName("org.apache.cassandra.cql.jdbc.CassandraDriver");
con =
DriverManager.getConnection("jdbc:cassandra://localhost:9160/Keyspace");
String query = "SELECT * FROM column_family where gender=f ";
Statement stmt = con.createStatement();
ResultSet result = stmt.executeQuery(query);
while (result.next()) {
System.out.println(result.getString("user_name"));
System.out.println(result.getString("gender"));
System.out.println(result.getString("password"));
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (con != null) {
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
con = null;
}
}
}

Answer 2

Please add the dependency below in pom.xml......
<dependency>
<groupId>org.apache.thrift</groupId>
<artifactId>libthrift</artifactId>
<version>0.9.3</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.5</version>
</dependency>