我可以使用Presto创建Hive Metastore吗？

时间：2015-02-17 17:17:01

标签： hadoop amazon-web-services hive presto

基本问题：我可以使用Presto作为我的Hive Metastore的基础吗？

我正在尝试在亚马逊aws上安装presto和hive，我在创建Hive Metastore时遇到了麻烦。 除了未能连接到Metastore之外，Presto似乎已安装并正常工作。问题是当我运行Hive时，它无法创建一个Metastore。

当我运行Hive时，我收到以下错误：

Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
    at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:444)
    at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:672)
    at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:616)
    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:483)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:212)

Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
    at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1449)
    at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:63)
    at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:73)
    at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2661)
    at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2680)
    at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:425)
    ... 7 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
    at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1447)
    ... 12 more
Caused by: MetaException(message:Could not connect to meta store using any of the URIs provided. Most recent failure: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused
        at org.apache.thrift.transport.TSocket.open(TSocket.java:185)
        at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.open(HiveMetaStoreClient.java:358)
        at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:215)
        at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.<init>(SessionHiveMetaStoreClient.java:73)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
        at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1447)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:63)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:73)
        at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2661)
        at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2680)
        at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:425)
        at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:672)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:616)
        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:483)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at org.apache.thrift.transport.TSocket.open(TSocket.java:180)
        ... 20 more
)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.open(HiveMetaStoreClient.java:404)
    at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:215)
    at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.<init>(SessionHiveMetaStoreClient.java:73)
    ... 17 more

我的conf / hive-site.xml如下：

<property>
<name>hive.metastore.uris</name>
<value>thrift://ec2..........amazonaws.com:8080</value>
<description>Thrift URI for the remote metastore. Used by metastore client to connect to remote metastore. </description>


<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:presto://ec2...........amazonaws.com:9083/hive;databaseName=metastore_db;create=true</value>
<description>JDBC connect string for a JDBC metastore</description>


<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>presto-jdbc-0.90.jar</value>
<description>Driver class name for a JDBC metastore</description>

我可以使用presto创建我的Metastore还是必须使用mySQL或derby？如果可以的话，我将非常感谢能够解决这个问题的任何帮助。

谢谢！

4 个答案:

答案 0 :(得分：1)

感谢目前为止的回复。

@Dain Sundstrom：我尝试了你对引导动作的建议，但没有真正的快乐。

在对蜂巢结构进行了更多的研究后，我不认为可以像我一样尝试使用presto。根据我现在的理解，presto使用hive作为其数据库，但是hive本身需要mySQL或derby的底层数据库，这是我出错的地方。所以我的计划是现在安装mySQL，链接配置单元，然后就这样做。该计划的第2步是祈祷它没有太多麻烦。

感谢您的帮助。

答案 1 :(得分：0)

理论上你应该能够做到这一点。但Presto需要一个后端;哪个支持Presto用于您的Metastore数据库？无论您使用哪种后端，都需要支持插入。

答案 2 :(得分：0)

EMR有一个Presto bootstrap action，可以为您处理所有设置。

答案 3 :(得分：0)

将Metastore存储到MySQL时，可以使用以下步骤：

CREATE DATABASE metastore_db;

CREATE USER 'hiveuser'@'%' IDENTIFIED BY 'hivepassword';

GRANT all on *.* to 'hiveuser'@localhost identified by 'hivepassword';

flush privileges;

完成后，将以下内容添加到$ HIVE_HOME / conf /

中的hive-site.xml 
<property>
        <name>javax.jdo.option.ConnectionURL</name>
        <value>jdbc:mysql://10.0.0.96/metastore_db?createDatabaseIfNotExist=true</value>
        <description>metadata is stored in a MySQL server</description>
        </property>

        <property>
        <name>javax.jdo.option.ConnectionDriverName</name>
        <value>com.mysql.jdbc.Driver</value>
        <description>MySQL JDBC driver class</description>
        </property>

        <property>
        <name>javax.jdo.option.ConnectionUserName</name>
        <value>hiveuser</value>
        <description>user name for connecting to mysql server </description>
        </property>

        <property>
        <name>javax.jdo.option.ConnectionPassword</name>
        <value>hivepassword</value>
        <description>password for connecting to mysql server </description>
        </property>

        <property>
        <name>hive.metastore.uris</name>
        <value>thrift://10.0.0.96:9083</value>
        <description>Hive metastore Thrift server</description>
        </property>

然后启动Metastore服务：

hive --service metabore＆amp;

如果您想了解更多内容，或者您​​遇到困难，请发表评论。

此致 德维普拉萨德。

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