Hi，I want to know what's specific version your hadoop is，My Hadoop
version is 2.6.0-cdh5.4.4. I got a error at Extract Fact Table Distinct
Columns step, mr job failed. The error info is :java.io.IOException:
Initialization of all the collectors failed. Error in last collector was
:Cannot find serializer for
org.apache.kylin.engine.mr.steps.SelfDefineSortableKey at
org.apache.hadoop.mapred.MapTask.createSortingCollector.
It seems you did not meet this problem. Did you change anything, such
as maven dependency. Thank you very much!
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