KaimingChen created SQOOP-3002:
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Summary: Sqoop Merge Tool support composite merge-key
Key: SQOOP-3002
URL: https://issues.apache.org/jira/browse/SQOOP-3002
Project: Sqoop
Issue Type: Improvement
Components: hive-integration
Affects Versions: 1.99.7, 1.99.5, 1.4.6, 1.4.5
Reporter: KaimingChen
When i use sqoop merge tool, i can just specify one column using --merge-key
arguement. But when my table has composite keys, i got a Exception:
16/08/22 15:54:15 INFO mapreduce.Job: Task Id :
attempt_1470135750174_2508_m_000004_2, Status : FAILED
Error: java.io.IOException: Cannot join values on null key. Did you specify a
key column that exists?
at
org.apache.sqoop.mapreduce.MergeMapperBase.processRecord(MergeMapperBase.java:79)
at
org.apache.sqoop.mapreduce.MergeTextMapper.map(MergeTextMapper.java:58)
at
org.apache.sqoop.mapreduce.MergeTextMapper.map(MergeTextMapper.java:34)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162)
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:1491)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)
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