Foo bugfix

Change-Id: Id2db1cbf7bee61c0bd0178d62891d1f859ce31be
diff --git a/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java b/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java
index 0b0aaaf..8beed85 100644
--- a/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java
+++ b/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java
@@ -199,7 +199,11 @@
                     log.info("Write success {} -> {}", result.get().previousValue(), next);
                     break;
                 } else {
-                    log.info("Write failed trying to write{}", next);
+                    log.info("Write failed trying to write {}", next);
+                    read = dbService.read(ReadRequest.get(someTable, someKey));
+                    if (!read.valueExists()) {
+                        log.error("Shouldn't reach here");
+                    }
                 }
             } while (retry-- > 0);
         } catch (Exception e) {