diff --git a/impl/src/main/java/org/opencord/olt/driver/OltPipeline.java b/impl/src/main/java/org/opencord/olt/driver/OltPipeline.java
index bb52bce..bbf1ba7 100644
--- a/impl/src/main/java/org/opencord/olt/driver/OltPipeline.java
+++ b/impl/src/main/java/org/opencord/olt/driver/OltPipeline.java
@@ -431,6 +431,12 @@
 
     }
 
+    @Override
+    public void purgeAll(ApplicationId appId) {
+        log.warn("Purge All not implemented by OLT Pipeliner");
+        //TODO not used by OLT app, only by trellis
+    }
+
     private GroupBucket buildBucket(TrafficTreatment treatment) {
         return DefaultGroupBucket.createAllGroupBucket(treatment);
     }