Bug 5239: Using read lock where only reading from the preferences

collections

java/com.sap.sse.security.userstore.mongodb/src/com/sap/sse/security/userstore/mongodb/UserStoreImpl.java

@@ -1307,7 +1307,7 @@ public class UserStoreImpl implements UserStore {
 
     @Override
     public <T> T getPreferenceObject(String username, String key) {
-        return LockUtil.executeWithWriteLockAndResult(preferenceLock, () -> {
+        return LockUtil.executeWithReadLockAndResult(preferenceLock, () -> {
             final Object result;
             Map<String, Object> userMap = preferenceObjects.get(username);
             if (userMap != null) {