我成功地将clob数据类型的数据从db2导入到hive。在hive中的表上进行一些处理之后，我想将表加载回db2。
用于导入的命令：
$SQOOP_HOME/bin/sqoop import --connect jdbc:db2://192.168.145.64:50000/one --table clobtest --username db2inst1 --password dbuser --hive-import --map-column-hive CLOBB=STRING --inline-lob-limit 155578 --target-dir /tmp/1 --m 1
用于导出的命令：
$SQOOP_HOME/bin/sqoop export --connect jdbc:db2://192.168.145.64:50000/one --username db2inst1 --password dbuser --export-dir /user/hive/warehouse/clobtest --table clobtest --input-fields-terminated-by '\0001' --input-null-string '\\N' --input-null-non-string '\\N' --m 1
在导出时，我收到以下错误：
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:145)
at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
Caused by: java.io.IOException: Could not buffer record
at org.apache.sqoop.mapreduce.AsyncSqlRecordWriter.write(AsyncSqlRecordWriter.java:218)
at org.apache.sqoop.mapreduce.AsyncSqlRecordWriter.write(AsyncSqlRecordWriter.java:46)
at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.write(MapTask.java:635)
at org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)
at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)
at org.apache.sqoop.mapreduce.TextExportMapper.map(TextExportMapper.java:84)
... 10 more
Caused by: java.lang.CloneNotSupportedException: com.cloudera.sqoop.lib.ClobRef
at java.lang.Object.clone(Native Method)
at org.apache.sqoop.lib.LobRef.clone(LobRef.java:109)
at clobtest.clone(clobtest.java:222)
at org.apache.sqoop.mapreduce.AsyncSqlRecordWriter.write(AsyncSqlRecordWriter.java:213)
... 15 more
有关此错误的任何想法？
感谢。