add debug log messages for scheduling

Author: csviri

operator-framework/src/main/java/com/github/containersolutions/operator/processing/EventScheduler.java

@@ -114,8 +114,10 @@ void scheduleEvent(CustomResourceEvent event) {
     void eventProcessingFinishedSuccessfully(CustomResourceEvent event) {
         try {
             lock.lock();
+            log.debug("Even processing successful for event: {}", event);
             eventStore.removeEventUnderProcessing(event.resourceUid());
             if (eventStore.containsNotScheduledEvent(event.resourceUid())) {
+                log.debug("Scheduling not yet scheduled after previous successful processing: {}", event);
                 scheduleEvent(eventStore.removeEventNotScheduledYet(event.resourceUid()));
             }
         } finally {
@@ -128,8 +130,12 @@ void eventProcessingFailed(CustomResourceEvent event) {
             lock.lock();
             eventStore.removeEventUnderProcessing(event.resourceUid());
             if (eventStore.containsNotScheduledEvent(event.resourceUid())) {
-                scheduleEvent(eventStore.removeEventNotScheduledYet(event.resourceUid()));
+                CustomResourceEvent notScheduledEvent = eventStore.removeEventNotScheduledYet(event.resourceUid());
+                log.debug("Even processing failed. Scheduling the most recent event. Failed event: {}," +
+                        " Most recent event: {}", event, notScheduledEvent);
+                scheduleEvent(notScheduledEvent);
             } else {
+                log.debug("Even processing failed. Attempting to re-schedule the event: {}", event);
                 scheduleEvent(event);
             }
         } finally {