Synax

src/main/java/fr/xephi/authme/cache/auth/PlayerCache.java

@@ -4,7 +4,7 @@ import java.util.concurrent.ConcurrentHashMap;
 
 public class PlayerCache {
 
-    private static PlayerCache singleton = null;
+    private volatile static PlayerCache singleton = null;
     private ConcurrentHashMap<String, PlayerAuth> cache;
 
     private PlayerCache() {

src/main/java/fr/xephi/authme/cache/backup/FileCache.java

@@ -546,9 +546,9 @@ public class FileCache {
                 file = new File("cache/" + player.getName().toLowerCase() + ".cache");
             }
             if (file.exists()) {
-                if (file.isDirectory()) {
+                if (file.isDirectory() && file.listFiles() != null) {
                     for (File f : file.listFiles()) {
-                        if (f.isDirectory()) {
+                        if (f.isDirectory() && f.listFiles() != null) {
                             for (File a : f.listFiles()) {
                                 a.delete();
                             }

src/main/java/fr/xephi/authme/cache/limbo/LimboCache.java

@@ -17,7 +17,7 @@ import fr.xephi.authme.settings.Settings;
 
 public class LimboCache {
 
-    private static LimboCache singleton = null;
+    private volatile static LimboCache singleton = null;
     public ConcurrentHashMap<String, LimboPlayer> cache;
     private FileCache playerData;
     public AuthMe plugin;