I am trying to retrieve records from the Hive tables. For that I have written the following connection in Java.
public static Connection getHiveConnection() throws IOException, SQLException {
System.out.println("Preparing Hive connection1");
Configuration conf = new Configuration();
conf.set("hadoop.security.authentication", "Kerberos");
System.setProperty("java.security.krb5.kdc", "ip-x-x-x-x.bc9.internal");
System.setProperty("java.security.krb5.realm", "ABCDEV.COM");
UserGroupInformation.loginUserFromKeytab("[email protected]", "/home/username/username.keytab");
// UserGroupInformation.setConfiguration(conf);
System.out.println("Kerberos Connected");
// Hive Connection
try {
Class.forName("org.apache.hive.jdbc.HiveDriver");
if((hiveConnection == null) || hiveConnection.isClosed()) {
hiveConnection = DriverManager.getConnection("jdbc:hive2://x.x.x.x.x:10500/schema;principal=hive/[email protected]", "user", "pwd");
return hiveConnection;
} else {
return hiveConnection;
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
return null;
} catch (SQLException e) {
e.printStackTrace();
return null;
}
}When I try to use the connection from this class, in other class like below:
Connection hiveCon = (Connection) DbManager.getHiveConnection();
PreparedStatement hive_pstmnt = hiveCon.prepareStatement(hiveCountQuery);
ResultSet hiveRs = hive_pstmnt.executeQuery();
I am getting the exception:
Preparing Hive connection1
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.
Kerberos Connected
java.sql.SQLException: Could not open client transport with JDBC Uri: jdbc:hive2://x.x.x.x.x:10500/schema;principal=hive/[email protected]: GSS initiate failed
Caused by: org.apache.thrift.transport.TTransportException: GSS initiate failed
In the code, I have commented the line: UserGroupInformation.setConfiguration(conf); and if I remove the comments and execute the code, I get a different exception:
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
Caused by: java.lang.IllegalArgumentException: Invalid attribute value for hadoop.security.authentication of Kerberos
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:200)
at org.apache.hadoop.security.UserGroupInformation.setConfiguration(UserGroupInformation.java:227)
at com.dbconnections.gphive.DbManager.getHiveConnection(DbManager.java:24)I have done kinit and generated the ticket just to make sure the ticket has valid time period. Could anyone let me know what is the mistake I am doing here so that can correct the code.
