How to run hiveserver2 as a service
Hi everyone, I have a setup multi node cluster (ie 5 node) on my network that works great. now i wanted to insert and extract data from cluster using hive, so i have hive installation of latest apache-hive-0.14.0-bin.tar.gz (i.e. 0.14.0 > from here ) on my main node as stated in this .
Also I wrote a java client class that will connect jdbc to the hive and insert data into HDFS using the hive.
HiveJdbcClient.Java
public class HiveJdbcClient {
private static final String DRIVER_NAME = "org.apache.hive.jdbc.HiveDriver";
private static final String HIVE_URL = "jdbc:hive2://x.x.x.x:10000/default";
private static final String HIVE_UNAME = "";
private static final String HIVE_PWD = "";
private static Connection con;
private HiveJdbcClient() {}
public static Connection getConnection() {
try {
if (con == null) {
synchronized (HiveJdbcClient.class) {
if (con == null) {
Class.forName(DRIVER_NAME);
con = DriverManager.getConnection(HIVE_URL,
HIVE_UNAME, HIVE_PWD);
System.out.println("Successfuly Connected to database...!");
}
}// End of synchronized block.
}// End of if block.
} catch (SQLException e) {
System.out.println("Can Not able to connect to database pls check your settings \n" + e);
} catch (ClassNotFoundException e) {
System.out.println("Can Not able to connect to database pls check your settings \n" + e);
}// End of try-catch block.
return con;
}// End of getConnection() Method.
public static ResultSet executeQuery(String sql) {
ResultSet set = null;
try {
if (sql != null) {
set = getConnection().createStatement().executeQuery(sql);
}
} catch (SQLException e) {
System.out.println("Error while executing query " + e);
}// End of try-catch block.
return set;
}// End of executeQuery() Method.
public static void main(String[] args) throws ParseException, SQLException {
ResultSet res = executeQuery("SELECT * FROM mytable");
while (res.next()) {
System.out.println(String.valueOf(res.getString(1)) + '\t'
+ String.valueOf(res.getFloat(2)) + '\t'
+ String.valueOf(res.getString(3)));
}
}
}//End of HiveJdbcClient Class.
my application able to connect to the server when i run the following command in terminal
$HIVE_HOME/bin/hiveserver2
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/opt/hadoop-2.6.0/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/opt/apache-hive-0.14.0-bin/lib/hive-jdbc-0.14.0-standalone.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
OK
but when i close this terminal my application gives the following error
MISTAKE
java.sql.SQLException: Could not open client transport with JDBC Uri: jdbc:hive2://X.X.X.X:10000/default: java.net.ConnectException: Connection refused
This means that I have to run hiveserver2 as a service on my master node.
can anyone help me start this hiveserver2 as a service. or any link that can help me start hiveserver2 as a service.
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Deprecated for versions 1.2 and higher hive
and the command hiveserver2
must be used directly.
So the correct way to run hiveserver2 in the background is:
nohup hiveserver2 &
Or with output to a log file:
nohup hiveserver2 > hive.log &
Sources: https://cwiki.apache.org/confluence/display/Hive/GettingStarted#GettingStarted-BuildingHivefromSource - It says "invocation hive" is deprecated.
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