fixes event recorder worker thread leakage

Author: yue9944882

extended/src/main/java/io/kubernetes/client/extended/event/legacy/LegacyEventBroadcaster.java

@@ -110,6 +110,8 @@ public void startRecording() {
               }
             } catch (InterruptedException e) {
               logger.info("shutdown signaled");
+            } catch (Throwable t) {
+              logger.error("failed recording event", t);
             }
           }
         });