Got it. Problem solved by changing the "map"
val pldIndex = GraphUtils.readVertices(PLDIndexFile).map { vertex =>
AnnotatedVertex(vertex.annotation, vertex.id) } -- View this message in context: http://apache-flink-incubator-user-mailing-list-archive.2336050.n4.nabble.com/IDE-indicates-the-data-type-error-of-my-Filter-operator-in-Scala-tp820p821.html Sent from the Apache Flink (Incubator) User Mailing List archive. mailing list archive at Nabble.com.
