Generating splits for a textual index column allowed only in case of "-Dorg.apache.sqoop.splitter.

使用Sqoop命令进行数据库导入HDFS时报错：

命令如下：

sqoop import \
--connect jdbc:mysql://master:3306/duanjc \
--username root \
--password 123456 \
--split-by id \
--table vehicle_name --m 2

报错信息:“Generating splits for a textual index column allowed only in case of “-Dorg.apache.sqoop.splitter.allow_text_splitter=true” property passed as a parameter”。

2022-02-12 18:38:13,930 ERROR tool.ImportTool: Import failed: java.io.IOException: Generating splits for a textual index column allowed only in ca
se of "-Dorg.apache.sqoop.splitter.allow_text_splitter=true" property passed as a parameter
        at org.apache.sqoop.mapreduce.db.DataDrivenDBInputFormat.getSplits(DataDrivenDBInputFormat.java:204)
        at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:310)
        at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:327)
        at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:200)
        at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1565)
        at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1562)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1762)
        at org.apache.hadoop.mapreduce.Job.submit(Job.java:1562)
        at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1583)
        at org.apache.sqoop.mapreduce.ImportJobBase.doSubmitJob(ImportJobBase.java:200)
        at org.apache.sqoop.mapreduce.ImportJobBase.runJob(ImportJobBase.java:173)
        at org.apache.sqoop.mapreduce.ImportJobBase.runImport(ImportJobBase.java:270)
        at org.apache.sqoop.manager.SqlManager.importTable(SqlManager.java:692)
        at org.apache.sqoop.manager.MySQLManager.importTable(MySQLManager.java:127)
        at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:520)
        at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:628)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
        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)
Caused by: Generating splits for a textual index column allowed only in case of "-Dorg.apache.sqoop.splitter.allow_text_splitter=true" property pa
ssed as a parameter
        at org.apache.sqoop.mapreduce.db.TextSplitter.split(TextSplitter.java:67)
        at org.apache.sqoop.mapreduce.db.DataDrivenDBInputFormat.getSplits(DataDrivenDBInputFormat.java:201)
        ... 23 more

问题分析：

导出表主键为文本类型导致。

主要问题是“–​​split​​-by id”这个参数指定的id是一个文本格式，所以需要在命令中加入选项"-Dorg.apache.sqoop.splitter.allow_text_splitter=true"，补齐命令：

sqoop import "-Dorg.apache.sqoop.splitter.allow_text_splitter=true" \
--connect jdbc:mysql://master:3306/duanjc \
--username root \
--password 123456 \
--split-by id \
--table vehicle_name --m 2

​