ilooner commented on a change in pull request #1408: DRILL-6453: Resolve 
deadlock when reading from build and probe sides simultaneously in HashJoin
URL: https://github.com/apache/drill/pull/1408#discussion_r208445485
 
 

 ##########
 File path: 
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/join/HashJoinBatch.java
 ##########
 @@ -248,95 +257,134 @@ protected void buildSchema() throws 
SchemaChangeException {
     }
   }
 
 
 Review comment:
   Thanks for catching this. I have removed the sniff schema methods and used 
prefetchFirstBatchFromBothSides() instead. Please see latest commit.

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