[GitHub] [hudi] satishkotha commented on pull request #1809: [HUDI-1080] Fix backward compatibility for com.uber inputformats

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satishkotha commented on pull request #1809:
URL: https://github.com/apache/hudi/pull/1809#issuecomment-655652601


   > @satishkotha I have COW tables with data written by hoodie 0.4.6, I've now followed https://cwiki.apache.org/confluence/display/HUDI/Migration+Guide+From+com.uber.hoodie+to+org.apache.hudi steps and have done successful writes/reads with hudi 0.5.3 Without your PR where would I face issue?
   
   Hi, have you been using HoodieCombineHiveInputFormat for your use cases? As you can see in the diff, the fixes are specific to combine input format.
   
   When we ran queries after upgrading to new version(0.5.1), we got below errors 
   1) `Caused by: org.apache.hudi.exception.HoodieException: Unexpected input format : com.uber.hoodie.hadoop.HoodieInputFormat
   	at org.apache.hudi.hadoop.hive.HoodieCombineHiveInputFormat.getRecordReader(HoodieCombineHiveInputFormat.java:522)`
   
   2) `org.apache.hudi.exception.HoodieException: Unexpected input format : org.apache.hadoop.hive.ql.io.orc.OrcInputFormat
   	at org.apache.hudi.hadoop.hive.HoodieCombineHiveInputFormat.getRecordReader(HoodieCombineHiveInputFormat.java:533)`
   
   With 0.4.x version same queries ran fine.  


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