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FAQ

Where is the org.apache.hadoop.mapred.JobConf class?

For HiveServer2 JDBC Driver org.apache.hive:hive-jdbc:4.0.1 or org.apache.hive:hive-jdbc:4.0.1 with classifier as standalone, there is actually no additional dependency on org.apache.hadoop:hadoop-mapreduce-client-core:3.3.6.

In some cases, users may need to do this.

import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.metastore.HiveMetaStoreClient;
import org.apache.hadoop.hive.metastore.api.MetaException;
public class ExampleTest {

    void test() throws MetaException {
        HiveConf hiveConf = new HiveConf();
        hiveConf.set("hive.metastore.uris", "thrift://metastore:9083");
        HiveMetaStoreClient storeClient = new HiveMetaStoreClient(hiveConf);
        storeClient.close();
    }
}

Using org.apache.hadoop.hive.conf.HiveConf specifically requires a dependency on the org.apache.hadoop.mapred.JobConf class. This class belongs to org.apache.hadoop:hadoop-mapreduce-client-core:3.3.6.

When users need to use org.apache.hadoop.hive.conf.HiveConf directly in business code, they can additionally introduce the following dependencies. Since only the org.apache.hadoop.mapred.JobConf class is needed, excluding all sub-dependencies is no problem.

<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-mapreduce-client-core</artifactId>
    <version>3.3.6</version>
    <exclusions>
        <exclusion>
            <groupId>*</groupId>
            <artifactId>*</artifactId>
        </exclusion>
    </exclusions>
</dependency>