[root@node ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.42 MySQL Community Server - GPL
Copyright (c) 2000, 2025, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> CREATE DATABASE weblog_db;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CREATE DATABASE weblog_db' at line 1
mysql> CREATE DATABASE weblog_db;
ERROR 1007 (HY000): Can't create database 'weblog_db'; database exists
mysql> USE weblog_db;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> DROP DATABASE IF EXISTS weblog_db;
Query OK, 2 rows affected (0.02 sec)
mysql> CREATE DATABASE weblog_db;
Query OK, 1 row affected (0.01 sec)
mysql> USE weblog_db;
Database changed
mysql> CREATE TABLE page_visits (
-> page VARCHAR(255) ,
-> visits BIGINT
-> );
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'TABLE page_visits (
page VARCHAR(255) ,
visits BIGINT
)' at line 1
mysql> CREATE TABLE page_visits (
-> page VARCHAR(255),
-> visits BIGINT
-> );
Query OK, 0 rows affected (0.02 sec)
mysql> SHOW TABLES;
+---------------------+
| Tables_in_weblog_db |
+---------------------+
| page_visits |
+---------------------+
1 row in set (0.00 sec)
mysql> ^C
mysql> q
-> quit
-> exit
-> ^C
mysql> ^C
mysql> ^C
mysql> ^DBye
[root@node ~]# hive
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Hive Session ID = 7bb79582-cc2b-49b6-abc7-020dcdc46542
Logging initialized using configuration in jar:file:/home/hive-3.1.3/lib/hive-common-3.1.3.jar!/hive-log4j2.properties Async: true
Hive-on-MR is deprecated in Hive 2 and may not be available in the future versions. Consider using a different execution engine (i.e. spark, tez) or using Hive 1.X releases.
Hive Session ID = 15d9da52-e18e-40b2-a80f-e76eda81df4c
hive> DESCRIBE FORMATTED page_visits;
OK
# col_name data_type comment
page string
visits bigint
# Detailed Table Information
Database: default
OwnerType: USER
Owner: root
CreateTime: Tue Jul 08 01:43:42 CST 2025
LastAccessTime: UNKNOWN
Retention: 0
Location: hdfs://node:9000/hive/warehouse/page_visits
Table Type: MANAGED_TABLE
Table Parameters:
COLUMN_STATS_ACCURATE {\"BASIC_STATS\":\"true\"}
bucketing_version 2
numFiles 1
numRows 4
rawDataSize 56
totalSize 60
transient_lastDdlTime 1751910222
# Storage Information
SerDe Library: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
InputFormat: org.apache.hadoop.mapred.TextInputFormat
OutputFormat: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
Compressed: No
Num Buckets: -1
Bucket Columns: []
Sort Columns: []
Storage Desc Params:
serialization.format 1
Time taken: 0.785 seconds, Fetched: 32 row(s)
hive> [root@node ~]#
[root@node ~]# sqoop export \
> --connect jdbc:mysql://localhost/weblog_db \
> --username root \
> --password Aa@123456 \
> --table page_visits \
> --export-dir hdfs://node:9000/hive/warehouse/page_visits \
> --input-fields-terminated-by '\001' \
> --num-mappers 1
Warning: /home/sqoop-1.4.7/../hcatalog does not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /home/sqoop-1.4.7/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
2025-07-08 15:28:12,550 INFO sqoop.Sqoop: Running Sqoop version: 1.4.7
2025-07-08 15:28:12,587 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
2025-07-08 15:28:12,704 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
2025-07-08 15:28:12,708 INFO tool.CodeGenTool: Beginning code generation
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
2025-07-08 15:28:13,225 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `page_visits` AS t LIMIT 1
2025-07-08 15:28:13,266 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `page_visits` AS t LIMIT 1
2025-07-08 15:28:13,280 INFO orm.CompilationManager: HADOOP_MAPRED_HOME is /home/hadoop/hadoop3.3
Note: /tmp/sqoop-root/compile/363869e21c2078b9742685122c43a3cc/page_visits.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
2025-07-08 15:28:16,377 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-root/compile/363869e21c2078b9742685122c43a3cc/page_visits.jar
2025-07-08 15:28:16,391 INFO mapreduce.ExportJobBase: Beginning export of page_visits
2025-07-08 15:28:16,391 INFO Configuration.deprecation: mapred.job.tracker is deprecated. Instead, use mapreduce.jobtracker.address
2025-07-08 15:28:16,484 INFO Configuration.deprecation: mapred.jar is deprecated. Instead, use mapreduce.job.jar
2025-07-08 15:28:17,339 INFO Configuration.deprecation: mapred.reduce.tasks.speculative.execution is deprecated. Instead, use mapreduce.reduce.speculative
2025-07-08 15:28:17,342 INFO Configuration.deprecation: mapred.map.tasks.speculative.execution is deprecated. Instead, use mapreduce.map.speculative
2025-07-08 15:28:17,343 INFO Configuration.deprecation: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps
2025-07-08 15:28:17,555 INFO client.DefaultNoHARMFailoverProxyProvider: Connecting to ResourceManager at node/192.168.196.122:8032
2025-07-08 15:28:17,782 INFO mapreduce.JobResourceUploader: Disabling Erasure Coding for path: /tmp/hadoop-yarn/staging/root/.staging/job_1751959003014_0001
2025-07-08 15:28:26,026 INFO input.FileInputFormat: Total input files to process : 1
2025-07-08 15:28:26,029 INFO input.FileInputFormat: Total input files to process : 1
2025-07-08 15:28:26,495 INFO mapreduce.JobSubmitter: number of splits:1
2025-07-08 15:28:26,528 INFO Configuration.deprecation: mapred.map.tasks.speculative.execution is deprecated. Instead, use mapreduce.map.speculative
2025-07-08 15:28:26,619 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1751959003014_0001
2025-07-08 15:28:26,620 INFO mapreduce.JobSubmitter: Executing with tokens: []
2025-07-08 15:28:26,805 INFO conf.Configuration: resource-types.xml not found
2025-07-08 15:28:26,805 INFO resource.ResourceUtils: Unable to find 'resource-types.xml'.
2025-07-08 15:28:27,226 INFO impl.YarnClientImpl: Submitted application application_1751959003014_0001
2025-07-08 15:28:27,264 INFO mapreduce.Job: The url to track the job: http://node:8088/proxy/application_1751959003014_0001/
2025-07-08 15:28:27,264 INFO mapreduce.Job: Running job: job_1751959003014_0001
2025-07-08 15:28:34,334 INFO mapreduce.Job: Job job_1751959003014_0001 running in uber mode : false
2025-07-08 15:28:34,335 INFO mapreduce.Job: map 0% reduce 0%
2025-07-08 15:28:38,374 INFO mapreduce.Job: map 100% reduce 0%
2025-07-08 15:28:38,381 INFO mapreduce.Job: Job job_1751959003014_0001 failed with state FAILED due to: Task failed task_1751959003014_0001_m_000000
Job failed as tasks failed. failedMaps:1 failedReduces:0 killedMaps:0 killedReduces: 0
2025-07-08 15:28:38,448 INFO mapreduce.Job: Counters: 8
Job Counters
Failed map tasks=1
Launched map tasks=1
Data-local map tasks=1
Total time spent by all maps in occupied slots (ms)=2061
Total time spent by all reduces in occupied slots (ms)=0
Total time spent by all map tasks (ms)=2061
Total vcore-milliseconds taken by all map tasks=2061
Total megabyte-milliseconds taken by all map tasks=2110464
2025-07-08 15:28:38,456 WARN mapreduce.Counters: Group FileSystemCounters is deprecated. Use org.apache.hadoop.mapreduce.FileSystemCounter instead
2025-07-08 15:28:38,457 INFO mapreduce.ExportJobBase: Transferred 0 bytes in 21.1033 seconds (0 bytes/sec)
2025-07-08 15:28:38,462 WARN mapreduce.Counters: Group org.apache.hadoop.mapred.Task$Counter is deprecated. Use org.apache.hadoop.mapreduce.TaskCounter instead
2025-07-08 15:28:38,462 INFO mapreduce.ExportJobBase: Exported 0 records.
2025-07-08 15:28:38,462 ERROR mapreduce.ExportJobBase: Export job failed!
2025-07-08 15:28:38,463 ERROR tool.ExportTool: Error during export:
Export job failed!
at org.apache.sqoop.mapreduce.ExportJobBase.runExport(ExportJobBase.java:445)
at org.apache.sqoop.manager.SqlManager.exportTable(SqlManager.java:931)
at org.apache.sqoop.tool.ExportTool.exportTable(ExportTool.java:80)
at org.apache.sqoop.tool.ExportTool.run(ExportTool.java:99)
at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:81)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
[root@node ~]# sqoop export \
> --connect jdbc:mysql://localhost/weblog_db \
> --username root \
> --password Aa@123456 \
> --table page_visits \
> --export-dir hdfs://node:9000/hive/warehouse/page_visits \
> --input-fields-terminated-by ',' \
> --num-mappers 1
Warning: /home/sqoop-1.4.7/../hcatalog does not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /home/sqoop-1.4.7/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
2025-07-08 15:30:31,174 INFO sqoop.Sqoop: Running Sqoop version: 1.4.7
2025-07-08 15:30:31,218 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
2025-07-08 15:30:31,333 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
2025-07-08 15:30:31,336 INFO tool.CodeGenTool: Beginning code generation
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
2025-07-08 15:30:31,771 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `page_visits` AS t LIMIT 1
2025-07-08 15:30:31,814 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `page_visits` AS t LIMIT 1
2025-07-08 15:30:31,821 INFO orm.CompilationManager: HADOOP_MAPRED_HOME is /home/hadoop/hadoop3.3
Note: /tmp/sqoop-root/compile/ab00e36d1f5084a0f7d522b4e9a975e5/page_visits.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
2025-07-08 15:30:33,116 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-root/compile/ab00e36d1f5084a0f7d522b4e9a975e5/page_visits.jar
2025-07-08 15:30:33,129 INFO mapreduce.ExportJobBase: Beginning export of page_visits
2025-07-08 15:30:33,129 INFO Configuration.deprecation: mapred.job.tracker is deprecated. Instead, use mapreduce.jobtracker.address
2025-07-08 15:30:33,212 INFO Configuration.deprecation: mapred.jar is deprecated. Instead, use mapreduce.job.jar
2025-07-08 15:30:33,877 INFO Configuration.deprecation: mapred.reduce.tasks.speculative.execution is deprecated. Instead, use mapreduce.reduce.speculative
2025-07-08 15:30:33,880 INFO Configuration.deprecation: mapred.map.tasks.speculative.execution is deprecated. Instead, use mapreduce.map.speculative
2025-07-08 15:30:33,880 INFO Configuration.deprecation: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps
2025-07-08 15:30:34,097 INFO client.DefaultNoHARMFailoverProxyProvider: Connecting to ResourceManager at node/192.168.196.122:8032
2025-07-08 15:30:34,310 INFO mapreduce.JobResourceUploader: Disabling Erasure Coding for path: /tmp/hadoop-yarn/staging/root/.staging/job_1751959003014_0002
2025-07-08 15:30:39,127 INFO input.FileInputFormat: Total input files to process : 1
2025-07-08 15:30:39,131 INFO input.FileInputFormat: Total input files to process : 1
2025-07-08 15:30:39,995 INFO mapreduce.JobSubmitter: number of splits:1
2025-07-08 15:30:40,022 INFO Configuration.deprecation: mapred.map.tasks.speculative.execution is deprecated. Instead, use mapreduce.map.speculative
2025-07-08 15:30:40,532 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1751959003014_0002
2025-07-08 15:30:40,532 INFO mapreduce.JobSubmitter: Executing with tokens: []
2025-07-08 15:30:40,689 INFO conf.Configuration: resource-types.xml not found
2025-07-08 15:30:40,689 INFO resource.ResourceUtils: Unable to find 'resource-types.xml'.
2025-07-08 15:30:40,746 INFO impl.YarnClientImpl: Submitted application application_1751959003014_0002
2025-07-08 15:30:40,783 INFO mapreduce.Job: The url to track the job: http://node:8088/proxy/application_1751959003014_0002/
2025-07-08 15:30:40,784 INFO mapreduce.Job: Running job: job_1751959003014_0002
2025-07-08 15:30:46,847 INFO mapreduce.Job: Job job_1751959003014_0002 running in uber mode : false
2025-07-08 15:30:46,848 INFO mapreduce.Job: map 0% reduce 0%
2025-07-08 15:30:50,893 INFO mapreduce.Job: map 100% reduce 0%
2025-07-08 15:30:51,905 INFO mapreduce.Job: Job job_1751959003014_0002 failed with state FAILED due to: Task failed task_1751959003014_0002_m_000000
Job failed as tasks failed. failedMaps:1 failedReduces:0 killedMaps:0 killedReduces: 0
2025-07-08 15:30:51,973 INFO mapreduce.Job: Counters: 8
Job Counters
Failed map tasks=1
Launched map tasks=1
Data-local map tasks=1
Total time spent by all maps in occupied slots (ms)=2058
Total time spent by all reduces in occupied slots (ms)=0
Total time spent by all map tasks (ms)=2058
Total vcore-milliseconds taken by all map tasks=2058
Total megabyte-milliseconds taken by all map tasks=2107392
2025-07-08 15:30:51,979 WARN mapreduce.Counters: Group FileSystemCounters is deprecated. Use org.apache.hadoop.mapreduce.FileSystemCounter instead
2025-07-08 15:30:51,980 INFO mapreduce.ExportJobBase: Transferred 0 bytes in 18.0828 seconds (0 bytes/sec)
2025-07-08 15:30:51,983 WARN mapreduce.Counters: Group org.apache.hadoop.mapred.Task$Counter is deprecated. Use org.apache.hadoop.mapreduce.TaskCounter instead
2025-07-08 15:30:51,983 INFO mapreduce.ExportJobBase: Exported 0 records.
2025-07-08 15:30:51,983 ERROR mapreduce.ExportJobBase: Export job failed!
2025-07-08 15:30:51,984 ERROR tool.ExportTool: Error during export:
Export job failed!
at org.apache.sqoop.mapreduce.ExportJobBase.runExport(ExportJobBase.java:445)
at org.apache.sqoop.manager.SqlManager.exportTable(SqlManager.java:931)
at org.apache.sqoop.tool.ExportTool.exportTable(ExportTool.java:80)
at org.apache.sqoop.tool.ExportTool.run(ExportTool.java:99)
at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:81)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
[root@node ~]#
6.2 Sqoop导出数据
6.2.1从Hive将数据导出到MySQL
6.2.2sqoop导出格式
6.2.3导出page_visits表
6.2.4导出到ip_visits表
6.3验证导出数据
6.3.1登录MySQL
6.3.2执行查询
本文详细解释了在Python中尝试导入Redis模块时遇到的常见错误：ImportError: No module named 'redis'。文章提供了错误发生的原因，即Python默认不包含Redis支持，并指导读者如何通过访问GitHub上的redis-py项目来正确安装Redis库。
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