diff --git a/core/src/main/scala/org/apache/spark/deploy/master/PersistenceEngine.scala b/core/src/main/scala/org/apache/spark/deploy/master/PersistenceEngine.scala index da5060778edeb8028054f5bd29346e6646229995..a03d460509e037901cf6adf3b1d06b9b2e2233e8 100644 --- a/core/src/main/scala/org/apache/spark/deploy/master/PersistenceEngine.scala +++ b/core/src/main/scala/org/apache/spark/deploy/master/PersistenceEngine.scala @@ -33,7 +33,7 @@ import scala.reflect.ClassTag * The implementation of this trait defines how name-object pairs are stored or retrieved. */ @DeveloperApi -trait PersistenceEngine { +abstract class PersistenceEngine { /** * Defines how the object is serialized and persisted. Implementation will