Add debug..

client/src/main/java/dev/snowdrop/buildpack/docker/ImageUtils.java

@@ -19,6 +19,7 @@
 import com.github.dockerjava.api.command.PullImageResultCallback;
 import com.github.dockerjava.api.model.Image;
 import com.github.dockerjava.api.exception.DockerClientException;
+import com.github.dockerjava.api.exception.NotFoundException;
 
 import dev.snowdrop.buildpack.config.DockerConfig;
 import dev.snowdrop.buildpack.BuildpackException;
@@ -76,20 +77,24 @@ public static void pullImages(DockerConfig config, String... imageNames) {
     }
 
     // wait for pulls to complete.
-    DockerClientException lastSeen = null;
+    RuntimeException lastSeen = null;
     boolean allDone = true;
     while(!allDone && retriesRemaining>=0){
       allDone = true;
       for (Entry<String, PullImageResultCallback> e : pircMap.entrySet()) {
         boolean done = false;
         try {
           if(e.getValue()==null) continue;
+          log.debug("waiting on image "+e.getKey());
           done = e.getValue().awaitCompletion(config.getPullTimeout(), TimeUnit.SECONDS);
+          log.debug("success for image "+e.getKey());
         } catch (InterruptedException ie) {
           throw BuildpackException.launderThrowable(ie);
         } catch (DockerClientException dce) {
           //error occurred during pull for this pirc, need to pause & retry the pull op
           lastSeen = dce;
+        } catch (NotFoundException nfe) {
+          lastSeen = nfe;
         }
         if(!done){
           String imageName = e.getKey();