无法从 Brew 安装中使用 Derby 初始化 hive

Question

据我了解，Derby 在当前目录中创建文件。但是那里没有。

所以我曾尝试使用Derby 进行hive 初始化：但是.. 似乎是 derby 数据库已经存在。

 schematool --verbose -initSchema -dbType derby


Starting metastore schema initialization to 2.1.0
Initialization script hive-schema-2.1.0.derby.sql
Connecting to jdbc:derby:;databaseName=metastore_db;create=true
Connected to: Apache Derby (version 10.10.2.0 - (1582446))
Driver: Apache Derby Embedded JDBC Driver (version 10.10.2.0 - (1582446))
Transaction isolation: TRANSACTION_READ_COMMITTED
0: jdbc:derby:> !autocommit on
Autocommit status: true
0: jdbc:derby:> CREATE FUNCTION "APP"."NUCLEUS_ASCII" (C CHAR(1)) RETURNS INTEGER LANGUAGE JAVA PARAMETER STYLE JAVA READS SQL DATA CALLED ON NULL INPUT EXTERNAL NAME 'org.datanucleus.store.rdbms.adapter.DerbySQLFunction.ascii'
Error: FUNCTION 'NUCLEUS_ASCII' already exists. (state=X0Y68,code=30000)

Closing: 0: jdbc:derby:;databaseName=metastore_db;create=true
org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization FAILED! Metastore state would be inconsistent !!
Underlying cause: java.io.IOException : Schema script failed, errorcode 2
org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization FAILED! Metastore state would be inconsistent !!
    at org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:291)
    at org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:264)
    at org.apache.hive.beeline.HiveSchemaTool.main(HiveSchemaTool.java:505)
    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.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.io.IOException: Schema script failed, errorcode 2
    at org.apache.hive.beeline.HiveSchemaTool.runBeeLine(HiveSchemaTool.java:390)
    at org.apache.hive.beeline.HiveSchemaTool.runBeeLine(HiveSchemaTool.java:347)
    at org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:287)

那么……它在哪里？

更新我已经从头开始重新安装配置单元使用

  brew reinstall hive

同样的错误发生了。

另一个更新鉴于此错误的新方向，现在在另一个问题中回答：

找到了一个非 os/x 的答案——但其他方面类似——问题可以在这里提供：

https://stackoverflow.com/a/40017753/1056563

I installed hive with HomeBrew(MacOS) at /usr/local/Cellar/hive and afer running schematool -dbType derby -initSchema I get the following error message:

Starting metastore schema initialization to 2.0.0 Initialization script hive-schema-2.0.0.derby.sql Error: FUNCTION 'NUCLEUS_ASCII' already exists. (state=X0Y68,code=30000) org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization FAILED! Metastore state would be inconsistent !!

However, I can't find either metastore_db or metastore_db.tmp folder under install path, so I tried:

find /usr/ -name hive-schema-2.0.0.derby.sql
vi /usr/local/Cellar/hive/2.0.1/libexec/scripts/metastore/upgrade/derby/hive-schema-2.0.0.derby.sql
comment the 'NUCLEUS_ASCII' function and 'NUCLEUS_MATCHES' function
rerun schematool -dbType derby -initSchema, then everything goes well!

Answer 1

Homebrew 安装未配置的 Hive（版本 2.3.1）。默认设置是使用进程内 Derby 数据库（Hive 已经包含所需的库）。

您唯一需要做的（立即在brew install hive之后）就是初始化数据库：

schematool -initSchema -dbType derby

然后你可以运行hive，它就会工作。但是，如果您在初始化数据库之前尝试运行hive，Hive 实际上会半创建一个不完整的数据库并且将无法工作：

show tables;
FAILED: SemanticException org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient

由于数据库是半创建的，schematool 现在也会失败：

Error: FUNCTION 'NUCLEUS_ASCII' already exists. (state=X0Y68,code=30000)
org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization FAILED! Metastore state would be inconsistent !!

要解决这个问题，您必须删除数据库：

rm -Rf metastore_db

然后再次运行初始化命令。

注意到我从当前目录中删除了 metastore_db？这是另一个问题：Hive 被配置为在当前工作目录中创建和使用 Derby 数据库。这是因为它具有以下“javax.jdo.option.ConnectionURL”的默认值：

jdbc:derby:;databaseName=metastore_db;create=true

要解决这个问题，请创建文件 /usr/local/opt/hive/libexec/conf/hive-site.xml 为

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<configuration>
  <property>
    <name>javax.jdo.option.ConnectionURL</name>
    <value>jdbc:derby:/usr/local/var/hive/metastore_db;create=true</value>
  </property>
</configuration>

然后像以前一样重新创建数据库。现在数据库在/usr/local/var/hive，所以如果你在初始化数据库之前再次意外运行hive，删除它：

rm -Rf /usr/local/var/hive

Answer 2

您可能需要查看 hive 配置文件。这应该告诉你它在哪里被初始化。