hvanhovell commented on a change in pull request #28223: [SPARK-31450][SQL] 
Make ExpressionEncoder thread-safe
URL: https://github.com/apache/spark/pull/28223#discussion_r409397024
 
 

 ##########
 File path: sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
 ##########
 @@ -57,10 +57,6 @@ import org.apache.spark.sql.types._
  *   Encoders.bean(MyClass.class);
  * }}}
  *
- * == Implementation ==
- *  - Encoders are not required to be thread-safe and thus they do not need to 
use locks to guard
- *    against concurrent access if they reuse internal buffers to improve 
performance.
- *
 
 Review comment:
   I think it should be thread-safe.

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