Only poll for updates every 30 mins.

- Don't do GET requests on player join (bad idea, it was sync...)
 - If there's an update it will notify the player still, it just caches the update status

Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEvents.java

@@ -661,40 +661,17 @@ public class PlayerEvents extends PlotListener implements Listener {
         }, 20);
 
         if (pp.hasPermission(Captions.PERMISSION_ADMIN_UPDATE_NOTIFICATION.getTranslated())
-            && Settings.Enabled_Components.UPDATE_NOTIFICATIONS && PremiumVerification.isPremium()) {
+            && Settings.Enabled_Components.UPDATE_NOTIFICATIONS && PremiumVerification.isPremium()
-            try {
+            && UpdateUtility.hasUpdate) {
-                HttpsURLConnection connection = (HttpsURLConnection) new URL(
-                    "https://api.spigotmc.org/simple/0.1/index.php?action=getResource&id=77506")
-                    .openConnection();
-                connection.setRequestMethod("GET");
-                JsonObject result = (new JsonParser())
-                    .parse(new JsonReader(new InputStreamReader(connection.getInputStream())))
-                    .getAsJsonObject();
-                spigotVersion = result.get("current_version").getAsString();
-            } catch (IOException e) {
-                new PlotMessage(Captions.PREFIX
-                    + "Unable to check for updates, check console for further information.")
-                    .color("$13");
-                PlotSquared.log(Captions.PREFIX + "&cUnable to check for updates because: " + e);
-                return;
-            }
-
-            try {
-                if (!UpdateUtility.internalVersion.equals(spigotVersion)) {
             new PlotMessage("-----------------------------------").send(pp);
-                    new PlotMessage(
+            new PlotMessage(Captions.PREFIX + "There appears to be a PlotSquared update available!")
-                        Captions.PREFIX + "There appears to be a PlotSquared update available!")
-                        .color("$1").send(pp);
-                    new PlotMessage(Captions.PREFIX + "The latest version is " + spigotVersion)
                 .color("$1").send(pp);
+            new PlotMessage(Captions.PREFIX + "The latest version is " + spigotVersion).color("$1")
+                .send(pp);
             new PlotMessage(Captions.PREFIX + "Download at:").color("$1").send(pp);
             player.sendMessage("    https://www.spigotmc.org/resources/77506/updates");
             new PlotMessage("-----------------------------------").send(pp);
         }
-            } catch (final Exception e) {
-                e.printStackTrace();
-            }
-        }
     }
 
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)

Bukkit/src/main/java/com/plotsquared/bukkit/util/UpdateUtility.java

@@ -43,7 +43,9 @@ public class UpdateUtility implements Listener {
 
     public static String internalVersion;
     public static String spigotVersion;
+    public static boolean hasUpdate;
     public final JavaPlugin javaPlugin;
+    private boolean notify = true;
 
     public UpdateUtility(final JavaPlugin javaPlugin) {
         this.javaPlugin = javaPlugin;
@@ -73,10 +75,12 @@ public class UpdateUtility implements Listener {
                     + ", &6latest version is " + spigotVersion);
                 PlotSquared
                     .log(Captions.PREFIX + "&6https://www.spigotmc.org/resources/77506/updates");
-            } else {
+                hasUpdate = true;
+            } else if (notify) {
+                notify = false;
                 PlotSquared.log(Captions.PREFIX
                     + "Congratulations! You are running the latest PlotSquared version.");
             }
-        }, 0L, 12000L);
+        }, 0L, 36000L);
     }
 }