我正在尝试将表从 HDFS 导出到 SQOOP，但出现 java 异常。 我正在使用的查询如下:
sqoop export --connect jdbc:mysql://172.31.54.174/Database --driver com.mysql.jdbc.Driver --username user --password userpassword --table accounts --export-dir /user/pri/accounts
执行此查询时出现以下错误:
17/03/29 07:54:26 INFO mapreduce.Job: map 0% reduce 0%
17/03/29 07:54:30 INFO mapreduce.Job: Task Id : attempt_1489328678238_4886_m_000002_0, Status : FAILED
Error: java.io.IOException: Can't export data, please check failed map task logs
at org.apache.sqoop.mapreduce.TextExportMapper.map(TextExportMapper.java:112)
at org.apache.sqoop.mapreduce.TextExportMapper.map(TextExportMapper.java:39)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
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:1657)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
Caused by: java.lang.RuntimeException: Can't parse input data: '\N'
at accounts.__loadFromFields(accounts.java:691)
at accounts.parse(accounts.java:584)
at org.apache.sqoop.mapreduce.TextExportMapper.map(TextExportMapper.java:83)
... 10 more
Caused by: java.lang.IllegalArgumentException: Timestamp format must be yyyy-mm-dd hh:mm:ss[.fffffffff]
at java.sql.Timestamp.valueOf(Timestamp.java:204)
at accounts.__loadFromFields(accounts.java:643)
... 12 more
我导出的文件包含以下数据:
1,2008-10-23 16:05:05.0,\N,Donald,Becton,2275 Washburn Street,Oakland,CA,94660,5100032418,2014-03-18 13:29:47.0,2014-03-18 13:29:47.0
2,2008-11-12 03:00:01.0,\N,Donna,Jones,3885 Elliott Street,San Francisco,CA,94171,4150835799,2014-03-18 13:29:47.0,2014-03-18 13:29:47.0
我还创建了表accounts，其结构如下:
+----------------+-------------+-----+-----+---------+--------+
|领域|类型 |空 |关键|默认|额外 |
+----------------+-------------+------+-----+---------+--------+
| acct_num | varchar(20) | varchar(20)否 |优先原则 | | |
| acct_create_dt |日期时间 |否 | |空| |
| acc_close_dt |日期时间 |是 | |空| |
|名字 | varchar(20) | varchar(20)否 | |空| |
|姓氏 | varchar(20) | varchar(20)否 | |空 | |
|地址 | varchar(30) | varchar(30)否 | |空| |
|城市 | varchar(20) | varchar(20)否 | |空| |
|状态| varchar(20) | varchar(20)否 | |空| |
|邮政编码 | varchar(20) | varchar(20)否 | |空 | |
|电话号码 | varchar(20) | varchar(20)是 | |空| |
|创建|日期时间 |否 | |空| |
|修改|日期时间 |否 | |空 | |
+----------------+-------------+------+-----+---------+--------+
我还附上了错误的屏幕截图。 
最佳答案
正如您从日志中看到的那样，“\N”就像转义字符，因此它不适合 varchar。我不明白您为什么要添加相同的字符。还指出了时间戳格式问题。如果您用于主键的任何列本身重复，还要检查现有数据。
关于java - SQOOP 导出失败，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43088162/