Discriminator query cache error

src/test/java/org/tests/inheritance/TestInheritanceDiscriminatorQueryCache.java

@@ -0,0 +1,45 @@
+package org.tests.inheritance;
+
+import io.ebean.BaseTestCase;
+import io.ebean.Ebean;
+import io.ebean.EbeanServer;
+import org.junit.Test;
+import org.tests.inheritance.model.GroupConfiguration;
+import org.tests.inheritance.model.ProductConfiguration;
+
+import java.util.List;
+
+public class TestInheritanceDiscriminatorQueryCache extends BaseTestCase {
+
+  @Test
+  public void testDiscriminatorQueryCache() {
+    EbeanServer server = Ebean.getDefaultServer();
+
+    ProductConfiguration pc1 = new ProductConfiguration();
+    pc1.setName("PC1");
+    server.save(pc1);
+
+    ProductConfiguration pc2 = new ProductConfiguration();
+    pc1.setName("PC2");
+    server.save(pc2);
+
+    GroupConfiguration gc1 = new GroupConfiguration();
+    gc1.setName("GC1");
+    server.save(gc1);
+
+    GroupConfiguration gc2 = new GroupConfiguration();
+    gc1.setName("GC2");
+    server.save(gc2);
+
+    List<ProductConfiguration> list1 = server.createQuery(ProductConfiguration.class).setUseQueryCache(true).findList();
+    List<GroupConfiguration> list2 = server.createQuery(GroupConfiguration.class).setUseQueryCache(true).findList();
+
+    for(ProductConfiguration pc : list1) {
+      System.out.print(pc.getProductName());
+    }
+    for(GroupConfiguration gc : list2) {
+      System.out.print(gc.getGroupName());
+    }
+  }
+
+}

src/test/java/org/tests/inheritance/model/Configuration.java

@@ -1,18 +1,13 @@
 package org.tests.inheritance.model;
 
+import io.ebean.annotation.Cache;
 import io.ebean.annotation.ChangeLog;
 
-import javax.persistence.Column;
-import javax.persistence.DiscriminatorColumn;
-import javax.persistence.DiscriminatorType;
-import javax.persistence.Entity;
-import javax.persistence.Id;
-import javax.persistence.Inheritance;
-import javax.persistence.InheritanceType;
-import javax.persistence.ManyToOne;
+import javax.persistence.*;
 
 @ChangeLog
 @Entity
+@Cache(enableQueryCache = true)
 @Inheritance(strategy = InheritanceType.SINGLE_TABLE)
 @DiscriminatorColumn(name = "type", discriminatorType = DiscriminatorType.STRING)
 public class Configuration extends AbstractBaseClass {