使用HiveMetaStoreClient（因此，HiveConf）来检索Hive元数据

时间：2017-11-23 15:03:31

标签： hadoop hive hive-metastore

Kerberized HDP-2.6.3.0。

我可以使用Hive JDBC驱动程序从我的Windows机器连接到Hive，但是，我需要使用HiveMetaStoreClient的一些方法。我翻阅api并编写了一个测试代码，我正在从IDE执行。

private static void connectHiveMetastore() throws MetaException, MalformedURLException {
        //System.setProperty("javax.security.auth.useSubjectCredsOnly","false");
        //System.setProperty("java.security.krb5.conf","C:\\kerb5.conf");
        Configuration configuration = new Configuration();
        //configuration.addResource("E:\\hdp\\client_config\\HDFS_CLIENT\\core-site.xml");
        //configuration.addResource("E:\\hdp\\client_config\\HDFS_CLIENT\\hdfs-site.xml");
        HiveConf hiveConf = new HiveConf(configuration,Configuration.class);
        //URL url = new File("E:\\hdp\\client_config\\HDFS_CLIENT\\hive-site.xml").toURI().toURL();
        //hiveConf.setHiveSiteLocation(url);
        //hiveConf.setVar(HiveConf.ConfVars.METASTOREURIS,"thrift://l4283t.sss.com:9083,thrift://l4284t.sss.com:9083");
        HiveMetaStoreClient hiveMetaStoreClient = new HiveMetaStoreClient(hiveConf);
    }

pom文件中的依赖项：

</dependencies>
<dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.hive/hive-metastore -->
    <dependency>
        <groupId>org.apache.hive</groupId>
        <artifactId>hive-metastore</artifactId>
        <version>2.3.2</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.hive/hive-exec -->
    <dependency>
        <groupId>org.apache.hive</groupId>
        <artifactId>hive-exec</artifactId>
        <version>2.3.2</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-common -->
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-common</artifactId>
        <version>2.9.0</version>
    </dependency>
</dependencies>

无论我是否评论或取消注释与配置和Kerberos相关的行，我都会收到以下Hive wiki中解释的异常：

15:35:27.139 [main] ERROR org.apache.hadoop.hive.metastore.RetryingHMSHandler - MetaException(message:Version information not found in metastore. )
at org.apache.hadoop.hive.metastore.ObjectStore.checkSchema(ObjectStore.java:7564)
at org.apache.hadoop.hive.metastore.ObjectStore.verifySchema(ObjectStore.java:7542)
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.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:101)
at com.sun.proxy.$Proxy8.verifySchema(Unknown Source)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMSForConf(HiveMetaStore.java:591)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:584)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:651)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:427)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:148)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:107)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:79)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:92)
at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6893)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:164)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:129)
at com.my.App.connectHiveMetastore(App.java:58)
at com.my.App.main(App.java:37)
15:35:27.141 [main] ERROR org.apache.hadoop.hive.metastore.RetryingHMSHandler - HMSHandler Fatal error: MetaException(message:Version information not found in metastore. )
at org.apache.hadoop.hive.metastore.ObjectStore.checkSchema(ObjectStore.java:7564)
at org.apache.hadoop.hive.metastore.ObjectStore.verifySchema(ObjectStore.java:7542)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:101)
at com.sun.proxy.$Proxy8.verifySchema(Unknown Source)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMSForConf(HiveMetaStore.java:591)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:584)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:651)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:427)
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.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:148)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:107)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:79)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:92)
at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6893)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:164)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:129)
at com.my.App.connectHiveMetastore(App.java:58)
at com.my.App.main(App.java:37)
Exception in thread "main" MetaException(message:Version information not found in metastore. )
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:83)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:92)
at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6893)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:164)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:129)
at com.my.App.connectHiveMetastore(App.java:58)
at com.my.App.main(App.java:37)
Caused by: MetaException(message:Version information not found in metastore. )
at org.apache.hadoop.hive.metastore.ObjectStore.checkSchema(ObjectStore.java:7564)
at org.apache.hadoop.hive.metastore.ObjectStore.verifySchema(ObjectStore.java:7542)
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.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:101)
at com.sun.proxy.$Proxy8.verifySchema(Unknown Source)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMSForConf(HiveMetaStore.java:591)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:584)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:651)
at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:427)
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.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:148)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:107)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:79)
... 6 more
Process finished with exit code 1

我有以下问题/疑虑：

  1. 我正在考虑和连接HiveMetaStoreClient的方式是否正确？如果没有，我如何检索HiveMetaStoreClient 方法提供的元数据信息？
  2. 代码当然不是“到达”群集。以上是与依赖版本有关的异常吗？如果不是，可能是根本原因？

1 个答案:

答案 0 :(得分：0)

按照@Samson提供的线索（在评论中），我给出了Maven方法，并且只是继续复制群集中所需的jar。是的，这需要很长时间才能完成整理，但我确实取得了一些进展。 下面是我正在使用的类，我仍然得到与SASL相关的异常，但至少请求到达服务器。

private static void connectHiveMetastore() throws MetaException, MalformedURLException {

        System.setProperty("hadoop.home.dir", "E:\\Software\\Virtualization");

        /*Start : Commented or un-commented, immaterial ...*/
        System.setProperty("javax.security.auth.useSubjectCredsOnly","false");
        System.setProperty("java.security.auth.login.config","E:\\lib\\hdp\\loginconf.ini");
        System.setProperty("java.security.krb5.conf","E:\\lib\\hdp\\krb5.conf");
        /*End : Commented or un-commented, immaterial ...*/

        Configuration configuration = new Configuration();
        /*Start : Commented or un-commented, immaterial ...*/
        configuration.addResource("E:\\lib\\hdp\\client_config\\HDFS_CLIENT\\core-site.xml");
        configuration.addResource("E:\\lib\\hdp\\client_config\\HDFS_CLIENT\\hdfs-site.xml");
        configuration.addResource("E:\\lib\\hdp\\client_config\\HIVE_CLIENT\\hive-site.xml");
        configuration.set("hive.server2.authentication","KERBEROS");
        configuration.set("hadoop.security.authentication", "Kerberos");
        /*End : Commented or un-commented, immaterial ...*/

        HiveConf hiveConf = new HiveConf(configuration,Configuration.class);
        URL url = new File("E:\\lib\\hdp\\client_config\\HIVE_CLIENT\\hive-site.xml").toURI().toURL();
        HiveConf.setHiveSiteLocation(url);
        hiveConf.setVar(HiveConf.ConfVars.METASTOREURIS,"thrift://l4283t.sss.se.com:9083,thrift://l4284t.sss.se.com:9083");
        /*Start : Commented or un-commented, immaterial ...*/
        hiveConf.setVar(HiveConf.ConfVars.HIVE_SERVER2_AUTHENTICATION,"KERBEROS");
        /*End : Commented or un-commented, immaterial ...*/

        HiveMetaStoreClient hiveMetaStoreClient = new HiveMetaStoreClient(hiveConf);

        System.out.println("Metastore client : "+hiveMetaStoreClient);
        System.out.println("Is local metastore ? "+hiveMetaStoreClient.isLocalMetaStore());
        System.out.println(hiveMetaStoreClient.getAllDatabases());

        hiveMetaStoreClient.close();
    }
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