【发布时间】：2019-09-27 08:29:54
【问题描述】：
我正在尝试将 MySQL 数据导入 HDFS，但出现异常。
I have a table(products) in MYSQL and I am using the following command to import data into HDFS.
bin/sqoop-import --connect jdbc:mysql://localhost:3306/test --username root --password root --table products --target-dir /user/nitin/products
I am getting the following exception:
Error: java.io.IOException: SQLException in nextKeyValue
at org.apache.sqoop.mapreduce.db.DBRecordReader.nextKeyValue(DBRecordReader.java:277)`enter code here`
at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:553)
at org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80)
at org.apache.hadoop.mapreduce.lib.`enter code here`map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:784)
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:1642)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
Caused by: java.sql.SQLException: Unknown type '246 in column 2 of 3 in binary-encoded result set.
at com.mysql.jdbc.MysqlIO.extractNativeEncodedColumn(MysqlIO.java:3710)
at com.mysql.jdbc.MysqlIO.unpackBinaryResultSetRow(MysqlIO.java:3620)
at com.mysql.jdbc.MysqlIO.nextRow(MysqlIO.java:1282)
at com.mysql.jdbc.RowDataDynamic.nextRecord(RowDataDynamic.java:335)
at com.mysql.jdbc.RowDataDynamic.<init>(RowDataDynamic.java:68)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:416)
at com.mysql.jdbc.MysqlIO.readResultsForQueryOrUpdate(MysqlIO.java:1899)
at com.mysql.jdbc.MysqlIO.readAllResults(MysqlIO.java:1347)
at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1393)
at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:958)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1705)
at org.apache.sqoop.mapreduce.db.DBRecordReader.executeQuery(DBRecordReader.java:111)
at org.apache.sqoop.mapreduce.db.DBRecordReader.nextKeyValue(DBRecordReader.java:235)
... 12 more
我也用这个命令将数据导入HDFS：
bin/sqoop-import --connect jdbc:mysql://localhost:3306/test?zeroDateTimeBehavior=convertToNull --username root --password root --table products --target-dir /user/nitin/product
MapReduce 作业失败。
【问题讨论】：