sqoop：【error】mysql导出数据到hive报错HiveConfig:无法加载org.apache.hadoop.hive.conf.HiveConf。确保HIVE_CONF_DIR设置正确

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当尝试使用sqoop从mysql导出数据到hive时遇到错误，提示无法加载HiveConf。检查发现HiveConf.class确实在hive-common-1.1.0-cdh5.7.0.jar中存在，问题出在环境配置上。通过添加环境变量HADOOP_CLASSPATH，包括hadoop和hive库路径，成功解决了问题。

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19/06/05 10:03:38 ERROR hive.HiveConfig: Could not load org.apache.hadoop.hive.conf.HiveConf. Make sure HIVE_CONF_DIR is set correctly.
19/06/05 10:03:38 ERROR tool.CreateHiveTableTool: Encountered IOException running create table job: java.io.IOException: java.lang.ClassNotFoundException: org.apache.hadoop.hive.conf.HiveConf
        at org.apache.sqoop.hive.HiveConfig.getHiveConf(HiveConfig.java:50)
        at org.apache.sqoop.hive.HiveImport.getHiveArgs(HiveImport.java:392)
        at org.apache.sqoop.hive.HiveImport.executeExternalHiveScript(HiveImport.java:379)
        at org.apache.sqoop.hive.HiveImport.executeScript(HiveImport.java:337)
        at org.apache.sqoop.hive.HiveImport.importTable(HiveImport.java:241)
        at org.apache.sqoop.tool.CreateHiveTableTool.run(CreateHiveTableTool.java:57)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        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.hadoop.hive.conf.HiveConf
        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)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:264)
        at org.apache.sqoop.hive.HiveConfig.getHiveConf(HiveConfig.java:44)
        ... 11 more