基本问题：我可以使用presto作为我的hive元存储的基础吗？
我正在尝试在amazonaws上安装presto和hive，但是在创建hive元存储时遇到了问题。除了无法连接到metastore之外，presto似乎已经安装并正常工作。问题是，当我运行配置单元时，它无法创建元存储。
运行配置单元时，出现以下错误：

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来创建我的metastore还是必须使用mysql或derby？如果可以的话，我将非常感谢任何能帮我解决这个问题的人。
谢谢！

将元存储存储到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\u home/conf中的hive-site.xml中/

<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：
配置单元—服务元存储&
如果你想知道更多或者你被什么东西困住了，就发表评论吧。
你好，德维·普拉萨德。

4条答案

按热度按时间

bis0qfac1#

emr有一个presto bootstrap操作，可以为您处理所有的设置。

赞(0）回复(0）举报 2021-06-04

igsr9ssn2#

理论上你应该能做到。但是presto需要一个后端；哪个备份在presto中用于您的metastore db？无论您使用哪种后端，它都需要支持插入。

赞(0）回复(0）举报 2021-06-03

px9o7tmv3#

谢谢你的回复。
@丹·桑德斯特罗姆：我试过你建议的引导行动，但没有真正的乐趣。
在对Hive结构做了更多的研究之后，我认为不可能像我尝试的那样使用presto。据我现在所知，presto使用hive作为它的数据库，但是hive本身需要一个mysql或derby的底层数据库，这正是我出错的地方。所以我的计划是现在安装mysql，将hive链接到它，然后这样做。这个计划的第二步是祈祷它不会有太多麻烦。
谢谢你的帮助。

yftpprvb4#

我可以使用presto创建一个配置单元元存储吗？

4条答案

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