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mysql - 从 MySql 导入 Sqoop 失败，线程“main”java.lang.NoClassDefFoundError 出现异常

问题描述

从表命令将数据从 MySQL 导入sqoopdbHDFSemployee

sqoop import --connect jdbc:mysql://localhost:3306/sqoopdb --username sqoop -P --table employee

sqoop import --connect jdbc:mysql://localhost:3306/sqoopdb --username sqoop -P --table employee --m 1

两者都产生以下错误：

Warning: /usr/local/sqoop/../hbase does not exist! HBase imports will fail.
Please set $HBASE_HOME to the root of your HBase installation.
Warning: /usr/local/sqoop/../hcatalog does not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /usr/local/sqoop/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
Warning: /usr/local/sqoop/../zookeeper does not exist! Accumulo imports will fail.
Please set $ZOOKEEPER_HOME to the root of your Zookeeper installation.
2019-03-24 16:08:19,779 INFO sqoop.Sqoop: Running Sqoop version: 1.4.7
Enter password: 
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
            at org.apache.sqoop.tool.BaseSqoopTool.validateHiveOptions(BaseSqoopTool.java:1583)
            at org.apache.sqoop.tool.ImportTool.validateOptions(ImportTool.java:1178)
            at org.apache.sqoop.Sqoop.run(Sqoop.java:137)
            at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
            at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
            at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
            at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
            at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
        Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.StringUtils
            at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
            at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
            ... 8 more`

标签： mysqlimporthdfssqoop

解决方案

下载并复制commons-lang-2.6.jar到/usr/local/sqoop/lib文件夹，import将正常工作。

我正在使用Hadoop - 3.2.0和Sqoop 1.4.7

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