Sqoop2入门之导入关系型数据库数据到HDFS上(sqoop2-1.99.4版本)

sqoop2-1.99.4和sqoop2-1.99.3版本操作略有不同：新版本中使用link代替了老版本的connection，其他使用类似。

sqoop2-1.99.4环境搭建参见：Sqoop2环境搭建

sqoop2-1.99.3版本实现参见：Sqoop2入门之导入关系型数据库数据到HDFS上

启动sqoop2-1.99.4版本客户端：

$SQOOP2_HOME/bin/sqoop.sh client
set server --host hadoop000 --port  --webapp sqoop

查看所有connector：

show connector --all

 connector(s) to show:
        Connector with id 1:
            Name: hdfs-connector
            Class: org.apache.sqoop.connector.hdfs.HdfsConnector
            Version: 1.99.-cdh5.3.0

        Connector with id 2:
            Name: generic-jdbc-connector
            Class: org.apache.sqoop.connector.jdbc.GenericJdbcConnector
            Version: 1.99.-cdh5.3.0

查询所有link:

show link

删除指定link:

delete link --lid x

查询所有job:

show job

删除指定job:

delete job --jid 1

创建generic-jdbc-connector类型的connector

create link --cid 2
    Name: First Link
    JDBC Driver Class: com.mysql.jdbc.Driver
    JDBC Connection String: jdbc:mysql://hadoop000:3306/hive
    Username: root
    Password: ****
    JDBC Connection Properties:
    There are currently  values in the map:
    entry# protocol=tcp
    There are currently  values in the map:
    protocol = tcp
    entry#
    New link was successfully created with validation status OK and persistent id 3

show link

+----+-------------+-----------+---------+
| Id |    Name     | Connector | Enabled |
+----+-------------+-----------+---------+
| 3  | First Link  | 2         | true    |
+----+-------------+-----------+---------+

创建hdfs-connector类型的connector：

create link -cid 1
    Name: Second Link
    HDFS URI: hdfs://hadoop000:8020
    New link was successfully created with validation status OK and persistent id 4

show link
+----+-------------+-----------+---------+
| Id |    Name     | Connector | Enabled |
+----+-------------+-----------+---------+
|   | First Link  |          | true    |
|   | Second Link |          | true    |
+----+-------------+-----------+---------+

show link -all
     link(s) to show:
    link with id  and name First Link (Enabled: true, Created by null at -- ??:, Updated by null at -- ??:)
    Using Connector id
      Link configuration
        JDBC Driver Class: com.mysql.jdbc.Driver
        JDBC Connection String: jdbc:mysql://hadoop000:3306/hive
        Username: root
        Password:
        JDBC Connection Properties:
          protocol = tcp
    link with id  and name Second Link (Enabled: true, Created by null at -- ??:, Updated by null at -- ??:)
    Using Connector id
      Link configuration
        HDFS URI: hdfs://hadoop000:8020

根据connector id创建job:

create job -f 3 -t 4
    Creating job for links with from id  and to id
    Please fill following values to create new job object
    Name: Sqoopy

    From database configuration

    Schema name: hive
    Table name: TBLS
    Table SQL statement:
    Table column names:
    Partition column name:
    Null value allowed for the partition column:
    Boundary query: 

    ToJob configuration

    Output format:
       : TEXT_FILE
       : SEQUENCE_FILE
    Choose: 
    Compression format:
       : NONE
       : DEFAULT
       : DEFLATE
       : GZIP
       : BZIP2
       : LZO
       : LZ4
       : SNAPPY
       : CUSTOM
    Choose: 
    Custom compression format:
    Output directory: hdfs://hadoop000:8020/sqoop2/tbls_import_demo_sqoop1.99.4

    Throttling resources

    Extractors:
    Loaders:
    New job was successfully created with validation status OK  and persistent id 2

查询所有job:

show job
+----+--------+----------------+--------------+---------+
| Id |  Name  | From Connector | To Connector | Enabled |
+----+--------+----------------+--------------+---------+
|   | Sqoopy |               |             | true    |
+----+--------+----------------+--------------+---------+

启动指定的job:  该job执行完后查看HDFS上的文件(hdfs fs -ls hdfs://hadoop000:8020/sqoop2/tbls_import_demo_sqoop1.99.4/)

start job --jid 

查看指定job的执行状态:

status job --jid 

停止指定的job:

stop job --jid 

在start job(如：start job --jid 2)时常见错误：

Exception has occurred during processing command
Exception: org.apache.sqoop.common.SqoopException Message: CLIENT_0001:Server has returned exception

在sqoop客户端设置查看job详情：

set option --name verbose --value true
show job --jid