Error log added for serialization and throw exception before serializing other sort objects

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/SortJsonComponent.java

@@ -29,7 +29,11 @@ import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.node.ArrayNode;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 
+import org.springframework.core.convert.ConversionFailedException;
+import org.springframework.core.convert.TypeDescriptor;
 import org.springframework.data.domain.Sort;
 
 /**
@@ -39,6 +43,8 @@ import org.springframework.data.domain.Sort;
  */
 public class SortJsonComponent {
 
+	private static final Log LOG = LogFactory.getLog(SortJsonComponent.class);
+
 	public static class SortSerializer extends JsonSerializer<Sort> {
 
 		@Override
@@ -50,7 +56,14 @@ public class SortJsonComponent {
 					gen.writeObject(v);
 				}
 				catch (IOException e) {
-					e.printStackTrace();
+					String message = "Couldn't serialize Sort object for " + v;
+					if (LOG.isErrorEnabled()) {
+						LOG.error(message, e);
+					}
+					else {
+						throw new ConversionFailedException(TypeDescriptor.valueOf(Sort.class),
+							TypeDescriptor.valueOf(String.class), v, e);
+					}
 				}
 			});
 			gen.writeEndArray();